DENTAL COMPONENT, DENTAL FIXATION FOR INSERTION IN A JAW BONE, AND DENTAL IMPLANT SET

专利摘要:
dental component, dental fixation, dental implant set and dental implant system. the invention relates to a dental component, which can only be connected in an indexing position in one type of dental fixation, but in any one of a plurality of indexing positions with another dental type. the dental component is provided with primary projections which are not completely uniformly distributed around the circumference of the coupling portion of the dental component. the invention also relates to a dental fixation, a dental implant assembly and a dental implant system.
公开号:BR112013009294B1
申请号:R112013009294-7
申请日:2011-10-19
公开日:2020-09-08
发明作者:Johan Holmström；Mats Wendel；Mattias Marklund
申请人:Dentsply Ih Ab；
IPC主号:

专利说明:

[0001] [0001] The present invention relates to a dental component, which comprises a coupling portion for coupling the dental component with a dental fixation adapted to be inserted into a jaw bone. The present invention also relates to a dental fixation for insertion into a jaw bone. Also, the present invention relates to a dental implant assembly that comprises a dental component connected to or to be connected to a dental fixation. Furthermore, the present invention relates to a dental implant system that comprises a dental component, a first dental fixation and a second dental fixation. BACKGROUND OF THE INVENTION
[0002] [0002] A common way today to restore a damaged or lost tooth is to install a dental implant that comprises a fixation on the adjacent jaw bone tissue (jaw or jaw) and replace the damaged or lost tooth with a dental prosthesis. A superstructure, such as a support, can be used as a connection between the dental prosthesis and the installed fixation.
[0003] [0003] There are several fixation configurations. For example, a fixation may have a coronal head portion with a flat top, which can be installed in any rotational position with respect to a jaw bone. Another type of fixation configuration is a fixation that has an inclined coronal end portion, as described in US 6,655,961, in which the fixation length is longer on the lingual side than on the buccal side in order to correspond with the contour of the jaw bone. Since the fixations are quite small, approximately 10 mm, it can be quite difficult for a dentist to see the orientation of the fixation inclination during the process of inserting the fixation into the jaw bone. It follows that there is a risk that, when the fixation is in its installed position within the jaw bone, the tipped coronal end portion is not oriented correctly and does not follow the contours of the jaw bone as intended. Thus, it would be desirable to ensure that the dentist installs the inclined fixation in a correct orientation, without restricting his freedom to manipulate / install other fixations, such as flat top fixations, which do not have a designated rotational orientation with respect to the jaw bone. .
[0004] [0004] Similarly, for the fixation / jaw bone interface described above, for a superstructure, such as a support, there may be a support / fixation interface in which the support can be positioned in various rotational positions in relation to the fixation, and there may be a support / fixation interface in which the support should only be positioned in a manner relative to the fixation (for example, a support that has an inclined portion that matches the inclined head portion of a fixture). Thus, also with respect to this interface, it would be desirable to ensure that the dentist connects the superstructure with a correct rotational orientation relative to certain fixations, without restricting its freedom of action when connecting the superstructure to other fixations that do not have a designated mutual rotational orientation with respect to each other. SUMMARY OF THE INVENTION
[0005] [0005] The present invention is based on the perception that one and the same dental component can be used to restrict freedom of action in connection with a first type of fixation, while not restricting freedom of action when used in connection with a second type fastening.
[0006] [0006] According to at least one first aspect of the invention, a dental component is provided. The dental component comprises a coupling portion for coupling the dental component with a dental fixation adapted to be inserted into a jaw bone, the coupling portion being provided with at least two primary radial projections which are distributed along the circumference of the portion coupling and which are adapted to be received within corresponding recesses provided in the fixation, in which, following the circumference of the coupling portion, a first distance separates a first primary radial projection and a second primary radial projection from said primary projections, and a second distance separates said second primary radial projection and a subsequent primary radial projection from said primary projections, wherein said first distance is greater than said second distance, and in which the coupling portion area covered by said first distance is either free of projections or provided with a secondary radial projection which in at least one direction is less than one of the said primary radial projections.
[0007] [0007] Thus, having this distribution displaced from primary projections, the dental component may have a single possible rotational orientation / position with one type of fixation, but several rotational orientations / positions possible with another type of fixation. For example, a fixation that has recesses which can receive said projections and which are circumferentially distributed in correspondence with said projections, can only receive the dental component in a designated rotational position. On the other hand, a fixation which has one or more additional recesses for receiving said primary projections can receive the dental component in any one of a plurality of rotational positions. A fixture having said additional recesses may suitably, although not necessarily, have its recesses symmetrically spaced along the internal perimeter of the socket wall.
[0008] [0008] It should be noted that said primary projections can be equally sized projections. Alternatively, one or more of said primary projections may have different dimension (s) compared to other primary projections. In fact, all primary projections have their own individual configuration. However, in all alternatives, if a secondary projection is present, its extension in one direction is less than the extension of any of the primary extensions in the corresponding direction. As the projections are spaced from each other around the circumference of the coupling portion, the above expression "extension in one direction" must be understood to be related to a coordinate system that has radial, circumferential (angular) and longitudinal coordinates. For example, the secondary projection may have a shorter radial extension than the primary projections, or a shorter extension in the circumferential direction, or even a shorter extension in a direction perpendicular to the radial direction, etc.
[0009] [0009] It should be noted that the dual functionality of the dental component can be achieved with two or more primary projections, in which a first distance separates a first projection and a second direction from said primary projections, and a second distance separates said second projection and the subsequent projection of said primary projections. In the case of the dental component which only has two such primary projections, the so-called "first projection" and the so-called "subsequent projection" is one and the same projection. In the case of the dental component that has three or more such primary projections, the so-called "subsequent projection" is a third projection, that is, not the first projection.
[0010] [00010] According to at least one exemplary embodiment, the coupling portion is provided with at least three of said primary radial projections, one of which is interposed between the other two and separated by the same distance from the other two.
[0011] [00011] According to at least one exemplary embodiment, the coupling portion is provided with a set of primary radial projections, which are equidistantly distributed around the circumference of the coupling portion and at least one additional primary radial projection which is interposed between two neighboring projections of said set of primary radial projections equidistantly distributed.
[0012] [00012] Both distributions just described would include, for example, a set of six projections equidistantly distributed, and a seventh projection interposed between two neighboring projections of said set of projections. Thus, the seventh projection will form, together with the two surrounding projections, a triple located closer to each other than any other triple of projections.
[0013] [00013] According to at least one exemplary embodiment, the coupling portion has an external wall portion, in which the primary (and any secondary) projections project from the wall portion and in a direction away from a central longitudinal geometric axis of the dental component. In such a case, the coupling portion can be inserted into a socket which apically extends from a coronal end of a dental fixation. The dental fixation can be of a submerged type, that is, substantially the entire fixation is destined to be inserted in the jaw bone. Thus, the socket will be mainly located below the level of the bone crest. Alternatively, the dental fixation may be of the non-submerged type, for example, a head portion of the fixation extends above the bone crest in the installed state of the fixation, in which case the socket will be located at least above the bone crest (and possibly also extending apically in the fixation to a level below the bone crest). Furthermore, in the case of a type of non-submerged fixation, the fixation can be a transgingival dental fixation, that is, extending through the soft gingival tissue. Although some fixations of the non-submerged type may have a socket to receive the coupling portion, others may have a head portion with an external wall portion to be surrounded by the dental component. The latter alternative is reflected in the following modality.
[0014] [00014] According to at least one exemplary embodiment, the coupling portion has an internal wall portion, in which the primary (and any secondary) projections project from the wall portion in the direction of a central longitudinal geometric axis of the dental component. Thus, the projections are distributed along an internal perimeter of the coupling portion. The coupling portion is adapted to embrace the head portion of the non-submerged dental fixation (e.g., transgingival).
[0015] [00015] A dental component comprising three or more primary projections is reflected in at least one exemplary embodiment, according to which the coupling portion is provided with a plurality of said primary radial projections distributed along the circumference (internal perimeter or of the coupling portion, wherein said first distance separates a first pair of neighboring primary projections, and said second distance separates any other pair of neighboring primary projections, wherein, between said first pair of neighboring projections, the portion of coupling is either exempt from projections or provided with a secondary radial projection which in at least one direction is smaller than said primary radial projections.
[0016] [00016] If a dental component has a minor secondary projection present in the coupling portion area covered by said first distance, then a fixation in relation to which only a rotational position is desired must have a corresponding smaller recess which can only receive the minor secondary projection, but not the other major primary projections. A fixation in which the dental component is allowed to be positioned in several rotational positions will have instead of the said lower recess a large recess which can also receive the major primary projections. A minor secondary projection means that at least a portion of the projection is smaller in at least one direction, for example, in the radial direction, in the circumferential direction, in the axial direction.
[0017] [00017] The first distance and the second distance mentioned above must be measured in the circumferential direction. Thus, if the coupling portion is circular, then the distance will be an arc length s = air, where a is the angle in radians (rad) between the measurement points seen from the center of the circle and r is the radius of the circle. Also, the first distance and the second distance mentioned above must be measured at the same level along the geometric axis of fixation (that is, the same level in the coronal - apical direction). The measurement is made from the edge of the primary projections, that is, where the space that separates the primary projections begins and ends, respectively.
[0018] [00018] The possibly circular geometry is reflected in at least one exemplary embodiment, according to which the coupling portion comprises a wall portion suitably having a circular, polygonal cross section, such as square or hexagonal, or another suitable cross section from which said primary projections project radially, in which, following the circumference of the wall portion, a first geometry axis extending from the center of the coupling portion to said first projection forms a first angle with respect to a second geometry axis extending from the center of the coupling portion to said second projection, whereas said second geometric axis forms a second angle with respect to a subsequent geometric axis that extends from the center of the coupling portion to said subsequent projection, wherein the first angle is an integer multiple of said second angle.
[0019] [00019] For example, the first projection and the second projection may be provided diametrically opposite each other, that is, they will be at a first 180 ° angle (180 / π rad), and a subsequent projection may be arranged in the middle path around the circumference, that is, at 90 ° (90 / π rad). The first and second angles are properly measured from one point in one projection to a corresponding point in the other projection (for example, from center to center). It should be noted that there may be additional ones from said primary projections. For example, an additional projection may be provided between the subsequent exemplified projection and the first projection, such as at an angle of 30 ° (30 / π rad) with respect to said first projection. In other words, there may be several "second distances" or "second angles" which meet the relational criteria with respect to "first distance" and "first" angle ".
[0020] [00020] Said wall portion may be an external wall portion of a coupling portion to be inserted into a socket of a dental fixation. Alternatively, said wall portion may be an internal wall portion with an internal perimeter from which the projections project, wherein the coupling portion is adapted to be mounted on / around a head portion of a dental fixation.
[0021] [00021] The geometry of the dental component can vary between different modalities. For example, the geometry and configuration of the coupling portion can be incorporated in different modes. Also, there are numerous configurations, geometries and conceivable locations of the projections.
[0022] [00022] According to at least one exemplary embodiment, the coupling portion comprises a substantially cylindrical section, wherein said projections are provided in said substantially cylindrical section.
[0023] [00023] According to at least one exemplary embodiment, the coupling portion comprises an apically tuning section, wherein said projections are provided in said apically tuning section. The apically tuning section can be advantageous to provide a conical seal with a corresponding tuning section of a fixing socket.
[0024] [00024] According to at least one exemplary modality, said primary projections (and optionally also any secondary projection) have a thickness in a radial direction of the dental component, in which said thickness is apically thinning. These apically tuning projections may be arranged on a cylindrical coupling portion or on a thinning coupling portion, and may provide a wedge effect with a fixing socket.
[0025] [00025] The dental component can be any component selected from the group consisting of a support, a support replica, a trigger, a dressing cover and an impression grip element.
[0026] - a dita porção de acoplamento, - uma porção de recebimento de prótese a qual estende coronalmente da fixação, e - um furo vazado que estende através da parte de corpo, - em que a parte de parafuso está adaptada para ser inserida no furo vazado e acoplar uma rosca interna da fixação de modo a prender a parte de corpo na fixação. [00026] According to at least one exemplary embodiment, the dental component is in the form of a holder comprising a body part and a screw part, wherein the body part comprises - said coupling portion, - a prosthesis receiving portion which extends coronally from the fixation, and - a hollow hole that extends through the body part, - where the screw part is adapted to be inserted in the hollow hole and to engage an internal thread of the fixture in order to secure the body part in the fixture.
[0027] [00027] Thus, one and the same support can be used in either a determined rotational position, unique relative to a fixation or in one of a plurality of rotational positions relative to another fixation. It should be noted that in this order, a prosthesis receiving portion is not limited to receiving a prosthetic crown, but can also work with a bridge support.
[0028] [00028] According to at least one exemplary embodiment, the dental component is in the form of an inclined support in which the coupling portion has a first longitudinal geometric axis and the prosthesis receiving portion has a second longitudinal geometric axis, in which the first and second longitudinal geometric axes are inclined at a non-zero angle to each other. Said angle can, for example, be in the range of 5 ° -60 °, such as 10 ° -50 °, for example, 15 ° -45 °. For a fixation having an inclined top portion, it may be desirable to have a similarly inclined portion of the coupling bracket so that such an inclined portion follows the contour of the gingiva. Thus, in this case it is desirable to only have an indexing position for the support. However, to compensate for a disadvantageous extension direction of the support, the portion carrying the prosthesis can be inclined with respect to the fixing coupling portion.
[0029] [00029] According to at least one exemplary modality, the dental component is in the form of a trigger to trigger the fixation into the jaw bone, in which the trigger is provided with a distinctive mark to indicate to the user the rotational position of the fixation in relation to the jaw bone as the fixation is being activated into the jaw bone. Despite a limited advantage in connection with, for example, a flat top fixation which does not need to be inserted in a specific rotational position in the jaw bone, the biggest advantage in connection with, for example, an inclined top fixation which must be aligned with the inclination of the jaw bone. Thus, the driver can be properly connected to such an inclined top fixture in a rotational position, so that when the driver is connected to the fixture, the distinctive visible mark has a predetermined position in relation to the inclination direction of the fixture. Thus, even if the user cannot see the small inclination on the attachment, he / she will be able to infer the orientation of the inclination of the distinctive marking visible on the actuator.
[0030] [00030] According to at least one exemplary modality, each of the said primary projections is located in an extension direction of a respective radius that extends from a center of the component towards the periphery of the component, in which each of said projections is asymmetric with respect to such a radius extension direction. This can be advantageous for a driver who has not only said primary projections, but also one or more minor secondary projections. The asymmetry must suitably also be present in a corresponding internal fixation socket or external wall portion, which means that an asymmetric recess can be coupled to at least one side wall even by an undersized projection. Due to the asymmetric displacement of the recesses in the fixation socket, all projections will be allowed to couple a recess wall, thereby allowing the fixation to be efficiently activated into the jaw bone. This will be further illustrated in connection with the description of the accompanying drawings.
[0031] [00031] According to at least a second aspect of the invention, a dental fixation for insertion into a jaw bone is provided. The dental fixation comprises a wall provided with a set of at least two radially extending recesses, in which the recesses are arranged along the circumference of the wall, each recess being configured to receive any one of at least two primary radial projections provided on a coupling portion of a dental component, wherein, following the circumference of the wall, a first distance separates a first recess and a second recess from said set of recesses, and a second distance separates a second recess from a subsequent recess of said set of recesses, wherein said first distance is greater than the said second distance, wherein the wall area covered by said first distance is either without recesses or provided with a different radially extending recess which in at least one direction is smaller than each of said recesses in said recess set. The dental fixation according to this second aspect of the invention may suitably be in the form of a fixation that has a designated orientation with respect to the jaw bone, for example, an inclined top fixation. Although the recesses can substantially coincide with the geometry of said primary projections, as an alternative they can also be substantially larger, as long as they can receive the projections. Furthermore, the recesses in said set do not necessarily need to be of equal size, as long as each of said set can receive said primary projections of the dental component. In spite of everything, according to at least one exemplary modality, the recesses in said set of recesses are equally dimensioned.
[0032] [00032] Said wall provided with the recesses can form part of a socket which apically extends from a coronal end of the fixation. Thus, the recesses will be distributed along the internal perimeter of such socket wall. Alternatively, said wall may form part of an external boundary, such as the outside of a head portion, in which the recesses are distributed along an external perimeter.
[0033] [00033] If said set consists only of two recesses, the "subsequent recess" will be the "first recess". Thus, there will be two courses to follow between the first and the second steps, one course having a longer distance than the other.
[0034] [00034] Three or more recesses are reflected in at least one exemplary embodiment, according to which said set of recesses comprises a plurality of recesses which extend radially distributed along the circumference of the wall, wherein said first distance separates one first pair of neighboring recesses, and said second distance separates any other pair of neighboring recesses, wherein, between said first pair of neighboring recesses, the wall is either free of recesses or provided with a different recess which extends radially which in at least one direction is smaller than any recess in said set of recesses.
[0035] [00035] As previously explained with respect to the first aspect of the invention, two projections of the dental component can be provided at an angle which can be an integer multiple of one or more other angles among other projections. The corresponding angular relationship can also be present in a fixture socket or on an external fixation wall. Thus, according to at least one exemplary modality, following the circumference of the wall, a first radial geometry axis extending from a central longitudinal geometry axis to said first recess forms a first angle with respect to a second radial geometry axis extending from the central longitudinal geometry axis to said second recess, whereas said second radial geometry axis forms a second angle with respect to a subsequent radial geometry axis extending from the central geometry axis to said subsequent recess, wherein said first angle is an integer multiple of said second angle.
[0036] [00036] Said wall can be in the form of an internal wall of a fixing socket. The inner wall may suitably have a circular, polygonal cross-section, such as square or hexagonal, from which said recesses project radially. Said central longitudinal geometric axis can coincide with the center of the socket. Alternatively, said wall is an outer wall of a clamping head portion, wherein the outer wall can have any of the aforementioned cross sections.
[0037] [00037] Said dental fixation wall, as well as recesses, can have various configurations, geometries and locations. According to at least one exemplary embodiment, said wall comprises a substantially cylindrical wall section, wherein said recesses are provided in said substantially cylindrical wall section. According to at least one other exemplary embodiment, said wall comprises a wall section that is apically tuned, wherein said recesses are provided in said wall section that is apically tuned. The thin wall section can provide a conical seal with a corresponding thin section of the dental component (such as a bracket).
[0038] [00038] According to at least one exemplary embodiment, each recess in said set of recesses is located in an extension direction of a respective radius that extends from a central longitudinal geometric axis towards the wall, where each such recess is asymmetrical with respect to such a radius extension direction. This displacement or removal of the recess also allows undersized projections to engage at least one side wall of the recesses.
[0039] [00039] According to at least one exemplary embodiment, said wall is provided with a set of at least three recesses extending radially, one of which is interposed between the other two and separated by the same distance from the other two.
[0040] [00040] According to at least one exemplary embodiment, said wall is provided with a set of recesses extending radially, which are equidistantly distributed around the circumference of the wall and at least one recess extending radially further which is interposed between two neighboring recesses of said set equidistantly distributed of recesses extending radially.
[0041] [00041] Both distributions just described would include, for example, a set of six recesses equidistantly distributed, and a seventh recess interposed between two neighboring recesses of said set of recesses. Thus, the seventh recess together with the two surrounding recesses will form a triple located closer to each other than any other recess triple. A dental component that has a corresponding distribution of radial projections would only be receivable in an indexing position in relation to the fixation.
[0042] [00042] According to at least a third aspect of the invention, a dental implant assembly is provided. The dental implant assembly comprises a dental component according to the first aspect of the invention, which is connected to or which must be connected in a fixture according to the second aspect of the invention, in which the dental component has only one position indexing (ie, rotational) possible in relation to fixation.
[0043] [00043] Suitably, the fixation comprises a buccal side and a lingual side, in which, in the implanted state, the area of the coupling portion covered by said first distance is adapted to be arranged in a predetermined rotational position in relation to the buccal side. If said dental component is an actuator, it can be provided with a distinctive visual marking to indicate the relative position with respect to the buccal side. This helps the user to insert the fixation in an appropriate rotational position in relation to the jaw bone. At the coronal end, the fixation may suitably have a longer extension on the lingual side compared to the buccal side.
[0044] [00044] According to at least a fourth aspect of the invention, a dental implant assembly is provided. The dental implant assembly comprises a dental component according to the first aspect of the invention, which is connected to or which must be connected in a fixture comprising a wall provided with a plurality of radially extending recesses, in which the recesses they are arranged sequentially along the circumference of the wall, each recess being formed to receive one of said plurality of primary projections provided on the coupling portion of the dental component, wherein the number of said recesses is greater than the number of said primary projections . This can allow the dental component to be positioned in any one of a plurality of indexing (rotational) positions in relation to the fixation. For example, a dental component that has three primary projections can have four indexing positions relative to a fixation that has four of said recesses, if properly distributed. Five recesses can provide five possible index positions, etc.
[0045] - uma primeira fixação dental para inserção em um osso de maxilar, - uma segunda fixação dental para inserção em um osso de maxilar, e - um componente dental, tal como um suporte, uma réplica de suporte, um acionador, uma capa de curativo ou um elemento de pega de impressão, que compreende uma porção de acoplamento para acoplar com qualquer uma da dita primeira ou segunda fixação, - em que a primeira fixação permite que a porção de acoplamento seja assentada em qualquer uma de uma pluralidade de posições de indexação em relação à primeira fixação, enquanto que a segunda fixação permite que a porção de acoplamento seja assentada em menos posição de indexação em relação à segunda fixação do que o número de posições de indexação permissíveis em relação à primeira fixação. [00045] According to at least a fifth aspect of the invention, a dental implant system is provided. The system comprises - a first dental fixation for insertion into a jaw bone, - a second dental fixation for insertion into a jaw bone, and - a dental component, such as a support, a support replica, a driver, a dressing layer or an impression grip element, comprising a coupling portion for coupling with any of said first or second fixation, - wherein the first fixture allows the coupling portion to be seated in any one of a plurality of indexing positions with respect to the first fixation, while the second fixation allows the coupling portion to be seated in less indexing position with respect to to the second fixation than the number of permissible indexing positions in relation to the first fixation.
[0046] [00046] For example, a standard flat top fixture can be said fixation that allows the coupling portion to be seated in, for example, three, four or more indexing positions, while an inclined top fixation can be the said second fixation that allows only one indexing position of the coupling portion of the dental component. Alternatively, the second fixation can be in the form of a fixture that has a saddle-shaped top portion, like a wave or cutout which allows the dental component to be arranged in only two indexing positions (for example, rotating the dental component 180 °). Thus, if opposite surfaces of a saddle-like top portion, such as wave or indented, are substantially symmetrical, it does not matter which of the two indexing positions is chosen.
[0047] [00047] It should be understood that in the present description, a dental implant can comprise a dental fixation and a superstructure, such as a support.
[0048] [00048] A dental fixation is for use as the anchoring member of a dental prosthesis. For this purpose, dental fixation is inserted into a pre-prepared hole in the bone tissue of a jaw bone (jaw or mandible) at a location where dental prosthesis is required. The dental fixation is usually rotated inside the hole.
[0049] [00049] For screw type dental fixings, the hole may be provided with internal threads in advance or it may be left unthreaded with the dental fixation provided with a self-tapping capability, for example, by the provision of one or more recesses , cutting edges or notches that extend axially, etc., on the fixing thread. For example, an apical end portion of the attachment may be provided with 2-4 cut-outs, such as 3 cut-offs. Another number of cutting recesses are readily conceivable.
[0050] [00050] A superstructure to connect a prosthetic part of the fixation can comprise a support, a spacer or other transmucosal component which couples the dental fixation to cover the gingiva that overlaps the maxilla or mandible. The prosthetic part, for example, a crown, bridge, or denture can be attached to the support. There are several other forms that the superstructure can take. For example, the prosthetic part can be attached directly to the dental fixation. A dental implant can thus comprise a support connected to the dental fixation, or to the dental fixation without a support.
[0051] [00051] The term "coronal" is here and throughout this application used to indicate a direction towards the front or rear end of the dental implant. For example, in a situation where a support is connected to a dental fixation, the coronal direction of the support would be a direction towards the part of the support that is being directed away from the fixation. In contrast, the term "apical" indicates a direction towards an insertion end of the component. Thus, apical and coronal are opposite directions. But still, the term "axial direction" or "axially" is used throughout this application to indicate a direction taken from the coronal end to the apical end, or vice versa. The term "radial direction" or "radially" indicates a direction perpendicular to the axial direction.
[0052] [00052] A blind hole or socket can extend apically into the coronal end fixation body to an end surface between the apical and coronal ends of the fixation body for a support to be attached to the fixation. The socket can comprise an internally threaded section for a screw connection of the bracket in the fixation. A section of the socket, such as the coronal section, can be thinned towards the apical end. The tuned section is properly arranged coronal to the internally threaded section.
[0053] [00053] The above exemplified modalities taught that the recesses which project radially can be provided on an internal wall within a fixation socket, in which the coupling portion of a dental component is adapted to be received within said socket. Exemplified alternatives have taught that the recesses can be provided on an external wall of a head portion which must be contained by a dental component connectable in the fixation. Although this internal / external distinction has been made between the socket and the head portion, it should be noted that a head portion does not necessarily have an external wall to receive the coupling portion. In contrast, the head portion may be provided with an internal socket. Thus, any of the above exemplified modalities that discuss a socket can be in the form of a socket within a head portion of a dental fixation.
[0054] [00054] Fixation can be used in a one-stage procedure or a two-stage procedure. In a one-stage procedure, a dressing or temporary support is attached to the fixation to form the gingival tissue, and after a period of healing the dressing or temporary support is replaced by a permanent support. For a two-stage procedure the fixation is provided with a cover screw and the gingival tissue is sutured over the fixation and the cover screw, and after a period of healing the tissue is opened and a support is attached to the fixation after removal cover screw.
[0055] [00055] The fixation may have a conically tuning end portion which tapers towards the coronal end. The axial extension of this coronal end portion is small compared to the total length of the fixation, as an example no more than 4% of the total length, such as in the range of 1.5% - 3.7%. The coronal end portion may be provided without a threaded surface, for example, having a smooth or rough surface (such as sandblasted).
[0056] [00056] As previously discussed with respect to the various aspects of the invention, the fixation can have a substantially flat coronal end surface which is perpendicular to the longitudinal geometric axis of the fixation. Alternatively, the coronal end surface may have an inclined contour in relation to the longitudinal geometric axis of the fixation, for example, so that when positioned within the jaw bone the fixation length is longer on one lingual side and shorter on one side fixation mouthpiece. Another alternative is a coronal end surface in the form of a saddle or as a wave.
[0057] [00057] The length of the dental fixation can be in the range of 519 mm, depending on the clinical situation. The outside diameter of the dental fixation can suitably be in the 2-6 mm range, such as 35 mm.
[0058] [00058] The fixation can be substantially cylindrical or slightly tapered from the coronal end towards the apical end. If the fixation has a slight thinning, the fixing core and the outer periphery defined, for example, by screw tops can have the same or a different thinning angle. Furthermore, the fastening core can be cylindrical while the threaded tops describe a taper or, conversely, the fastening core can be tuned while the threaded tops describe a generally cylindrical geometry. Alternatively, the fixation may comprise a combination of one or more cylindrical portions and / or one or more tuned ones. Thus, one or more portions of the fixation may, for example, have screw tops that are on a common imaginary cylindrical surface, the cylindrical surface of which is parallel to the longitudinal geometric axis of the fixation. Alternatively, or in addition, one or more portions of the fixation may have screw tops that are on an imaginary conical surface which in the apical direction is tapering in the direction of the longitudinal geometric axis.
[0059] [00059] The externally threaded fixation may comprise one or more thread spirals.
[0060] [00060] The term "pitch" is used to indicate the axial distance between adjacent tops of a thread, the term "feed" is used to indicate the advanced distance parallel to the longitudinal geometric axis when the fixture is rotated by a revolution, ie that is, this corresponds to the step multiplied by the number of thread spirals. For a single thread spiral that has a constant pitch, the feed is equal to the pitch; for a double-threaded spiral, the feed is twice the pitch.
[0061] [00061] The term "micro-screw" is used to indicate a thread that has a height which is not greater than 0.2 mm. According to at least one exemplary embodiment, the fixation is provided with micro-crusts that have a height in the range of 0.02-0.2 mm, such as 0.050.15 mm, for example, 0.1 mm. The term "macrorescence" is used to indicate a thread that has a height that is greater than 0.2 mm. According to at least one exemplary embodiment, the fixation is provided with macroscrews that have a height in the range of 0.25-0.35 mm, such as 0.3 mm.
[0062] [00062] Suitably, the micro-threads can be located coronal to the micro-threads. For example, the micro-threads may be arranged to couple the dense cortical bone and the micro-threads may be arranged to couple the spongy / porous bone. The advance of a micro-thread appropriately corresponds to the advance of a micro-thread. The macro-screw step can, as an example, be 2-4 times, as well as 3 times, the micro-screw step. The pitch (spacing from top to top) in a fixation portion provided with micro-threads can be approximately 0.200 mm. The pitch (spacing from top to top) in a fixing portion provided with macroscrews can be approximately 0.60-072 mm.
[0063] [00063] The micro-threads can be considered as a defined, oriented roughness. A non-oriented roughness that has smaller dimensions, for example, obtained by blasting, corrosion, etc., can be superimposed on the micro-threads as well as the micro-threads.
[0064] [00064] A thread profile comprises two flanks, a top radius R, at the vertex formed between the intersection of said two flanks, a bottom radius r formed between two adjacent threads, said flanks forming an angle v with a plane o which is perpendicular to a cross section of said thread and perpendicular to a plane which is tangent to the surface of the fixing body, said profile still having a height D. Suitably for 10 ° ≤ v <35 °, R is greater than than 0.4 x D and, for 35 ° ≤v <55 °, R is greater than 0.2 x D. BRIEF DESCRIPTION OF THE DRAWINGS
[0065] [00065] Figures 1 and 2 illustrate an implant set according to at least one exemplary embodiment of the invention.
[0066] [00066] Figure 3 illustrates an implant set according to at least one other exemplary embodiment of the invention.
[0067] [00067] Figure 4 illustrates a driver coupling a fixture.
[0068] [00068] Figures 5a-5c illustrate three different conceivable cross sections of the driver / fixture interface in Figure 4, according to at least some exemplary embodiments of the invention.
[0069] [00069] Figure 6a illustrates a cross section of a dental component according to at least one exemplary embodiment of the invention.
[0070] [00070] Figure 6b illustrates, according to at least one exemplary embodiment of the invention, a cross section of a fixation which can receive the dental component of Figure 6a in eight different indexing positions.
[0071] [00071] Figure 6c illustrates, according to at least one exemplary embodiment of the invention, a cross section of a fixation which can receive the dental component of Figure 6a in only one indexing position.
[0072] [00072] Figure 7 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention.
[0073] [00073] Figure 8 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention.
[0074] [00074] Figure 9 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention.
[0075] [00075] Figure 10 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention.
[0076] [00076] Figure 11 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention.
[0077] [00077] Figures 12a and 12b illustrate, according to at least one exemplary embodiment of the invention, a fixation which can receive the dental component in only one indexing position.
[0078] [00078] Figure 13a schematically illustrates an indexing portion of a dental fixation according to at least one exemplary embodiment of the invention.
[0079] [00079] Figure 13b illustrates in cross section, according to at least one exemplary embodiment of the invention, a dental component connected to the fixation of Figure 13a. The dental component can only be arranged in an indexing position.
[0080] [00080] Figure 13c illustrates in cross section, according to at least one exemplary embodiment of the invention, another dental component connected to the fixation of Figure 13a. The dental component can be arranged in a plurality of indexing positions.
[0081] [00081] Figure 13d illustrates in cross section, according to at least one exemplary embodiment of the invention, yet another dental component connected in the fixation of Figure 13a. The dental component can only be arranged in an indexing position. DETAILED DESCRIPTION OF THE DRAWINGS
[0082] [00082] Figures 1 and 2 illustrate an implant set according to at least one exemplary embodiment of the invention. The implant assembly comprises a dental fixation 2 and a dental component 4, shown here as a two-piece support.
[0083] [00083] The fixation 2 illustrated here has a coronal portion 6 that apically extends from a coronal end 12 of the fixation 2, and an apical portion 10 that extends coronally from an apical end 14 of the fixation. An intermediate portion 8 extends between the coronal portion 6 and the apical portion 10.
[0084] [00084] The apical portion 10 has a taper that tapers towards the apical end 14 of the fixation 2 to facilitate the insertion of fixation 2 in a hole 16 in the jaw bone 18. The angle of tapering in relation to the longitudinal geometric axis of fixation 2 can, for example, be approximately 10 ° -20 °, such as 15 °. Although Figures 1 and 2 illustrate a non-threaded apical portion 10, in an alternative embodiment the apical portion of the fixation may be provided with an external thread. Whether provided with a thread or not, the apical portion 10 may optionally, similar to coronal 6 and / or the intermediate portion 8, still be provided with a sandblasted, corroded or otherwise roughened surface structure.
[0085] [00085] Fixture 2 has a core from which a surface structure projects, in the example shown being in the form of threads.
[0086] [00086] The coronal portion 6 is illustrated here as being at least partially provided with micro-threads 20, which have three thread spirals, although another number is conceivable, such as 1, 2, 4 or more spirals. Although micro-threads 20 have been illustrated, according to at least one alternative exemplary embodiment, the coronal portion is at least partially provided with macroscrews 22, similarly to the intermediate portion 8, either as a separate screw spiral or as a continuation of the screw spiral. thread on the intermediate portion 8. According to at least one other alternative exemplary embodiment, instead of micro-threads, the coronal portion may be provided with a plurality of annular ridges, which to the naked eye could give the same visual appearance as micro-threads. Other conceivable alternatives are circumferential lines of strands or projections that are not oriented / randomly provided such as a shoulder.
[0087] [00087] In the exemplary embodiment illustrated, the macroscrews 22 in the intermediate portion 8 have the same advance as the microscrews 20 in the coronal portion 6. However, the macroscrews step 22 is three times the microscrews step 20, since the microscrews 20 comprise three thread spirals.
[0088] [00088] The length of the coronal portion 6 illustrated here can be approximately 1-2 mm, such as 1.5 mm. However, shorter or longer lengths are readily conceivable. The relative length of the coronal portion 6 can also be selected from a wide range, such as 5-50% of the total length of fixation 2, for example, 10-20%.
[0089] [00089] The coronal portion 6 comprises a tapered end portion 24, which tapers towards the coronal end 12 of the fixture 2. The tapered end portion 24 is no more than 4% of the total length of the fixture 2. The surface the tapered end portion 24 may be non-threaded, or smooth, or sandblasted (or otherwise roughened).
[0090] [00090] The intermediate portion 8 comprising the macroscrews 22 is illustrated here as having a thread spiral, however, the intermediate portion 8 may alternatively have two or more thread spirals. Similarly, although illustrated as having a substantially straight cylindrical shape, the intermediate portion 8 may be slightly tapered in the direction of the apical portion 10, in which case the thinning angle may, for example, be 3 ° or less, such as approximately 1 ° -2 °.
[0091] [00091] Cut recesses 26 or grooves extend from the apical end into the intermediate portion. The number of cut recesses 26 can be one or more, such as two, three or four cut recesses, suitably symmetrically positioned around the circumference of the apical end 14 of fixation 2 for a self-threading of fixation 2 when being screwed / turned in. the hole 16 provided in the maxilla or mandible.
[0092] [00092] A socket 28 having an open end is provided at the coronal end 12 of the fixture 2. The socket 28 extends apically into the fixture 2. The socket 28 is for receiving a dental component such as the illustrated support 4 which it will cover the gum superimposed on the hole and will support / present a prosthetic part 30. However, it can also receive other dental components such as a support replica, a driver, a dressing cover and an impression grip element.
[0093] [00093] Although several alternative configurations are conceivable, socket 28 is here illustrated as having a conical coronal section 32 and a substantially cylindrical middle wall section 34. Four radially extending recesses 36 are provided in the intermediate wall section 34. The recesses 36 are here illustrated as continuations of the conical coronal section 32 and are thus apically tuning. As an alternative, the recesses can be un-tuned. In addition, as an alternative, the intermediate wall section 34 can be substantially conical.
[0094] [00094] Socket 28 is also provided with an internally threaded apical section 38.
[0095] [00095] The dental component 4 is illustrated here as a two-piece holder consisting of a body part 40 and a screw part 42. The body part 40 comprises an coupling portion 44, which is illustrated here as having a generally cylindrical envelope surface, despite other envelope surfaces, such as thinned, would be conceivable alternatives. Body part 40 further comprises a crown receiving or dental prosthesis receiving portion 46 which extends coronally from fixation 2 above the gingiva. An extension portion 48, here illustrated as extending coronal to a shoulder 50, is intended to extend through the gingiva and is provided between the coupling portion 44 and the prosthesis receiving portion 46.
[0096] [00096] Three primary radial projections 52 are provided sequentially in the circumferential direction of the cylindrical envelope surface of the coupling portion 44. The primary projections 52, which in other embodiments may be present in other numbers, are here illustrated as wedge-shaped and apically tuning, that is, its radial extension is greater at its coronal end. Although the primary projections 52 are illustrated here as being equally sized projections, one or more of the primary projections may have different dimensions compared to one or more of the other primary projections.
[0097] [00097] Reference is now made to Figure 2 and the cross-sectional illustration of the support / fixation interface in its assembled state. Following the circumference of the coupling portion 44, a first distance L1 separates a first primary projection 52a and a second primary projection 52b, while a second distance L2 separates said second primary projection 52b and a subsequent or third primary projection 52c. Said second distance L2 is also present between the third primary projection 52c and the first primary projection 52a. Said first distance L1 is greater than said second distance L2. The area 54 covered by the first distance L1, that is, opposite the third primary projection 52c, is here illustrated as being free from projections. However, an alternative would be to provide said area 54 with a secondary radial projection which in at least one direction is smaller than the three primary projections. The angle between the first pair of neighboring primary projections, that is, the first 52a and the second 52b primary projections (from center to center) is 180 °, which is an integer multiple of the angle (90 °) between any other neighboring pair of primary projections, that is, the third 52c or any of the first 52a or second 52b primary projections.
[0098] [00098] The body part 40 of the support 4 is provided with a hollow hole 56, in which the screw part 42 is adapted to be inserted into the hollow hole 56 and to couple an internal thread 38 of the fixation 2 in order to secure the part body 40 in fixation 2.
[0099] [00099] In use, fixation 2 is inserted into a hole 16 in a jaw bone 18, as schematically illustrated in Figure 2. Since the coronal end 12 of fixation 2 is flat, fixation 2 has no preferred rotational installed position with respect to the jaw bone 18. Next, body part 40 of the support 4 is inserted into the installed fixation 2, allowing the recesses 36 in the socket to receive the primary projections 52a-52c of the coupling portion. As illustrated in the support / fixation interface in cross section in Figure 2, as there are four recesses 36, only one will be left empty. As the four recesses 36 are equally sized, or at least none of these are smaller than any of the three primary projections 52a-52c, the body part 40 of the support 4 can be inserted in any of four rotational indexing positions . The receiving portion of prosthesis 46 can be tilted in relation to the geometric axis of the hollowed hole 56. In such a case, the user, like a dentist, is able to select which of the four indexing positions provides the best orientation for the inclined prosthesis receiving 46. Likewise, if the prosthesis receiving portion is designed for custom assembly and has a specific patient configuration, the user will be able to arrange support 4 in a desired indexing position with respect to fixation. Although four recesses in the socket can be quite sufficient in many surgical applications, it is conceivable to provide a socket with more recesses to allow for additional indexing positions.
[0100] [000100] After the body part 40 has been arranged in the desired rotational indexing position in relation to fixation 2, and the projection / recess interface provided a rotational lock, the screw part 42 is inserted in the internally threaded apical section 38 of the fixation 2 and is tight. Finally, a prosthetic tooth 30 is attached to the support 4.
[0101] [000101] Figure 3 illustrates an implant set according to at least one other exemplary embodiment of the invention. The implant assembly comprises a support 4 which is identical to the support illustrated in Figures 1 and 2. However, the fixation 102 in Figure 3 is different. This has a sloping coronal end 112, where a lingual side 113 has a longer extension than a buccal side 115. When the fixation has been installed inside a hole 16 in the jaw bone 118, the coronal end 112 must follow the contour slant of the jaw bone 118. Thus, a fixation 102 has a desired rotational position in relation to the jaw bone 118. A driver 200, as shown in Figure 4, can be provided with a distinctive visual marking 201 and be received in only an indexing position in relation to fixation 102. The marking 201 will thus indicate to the user the direction of the inclined coronal end 112 as fixation 102 is being driven into the jaw bone 118 and the final rotational position of fixation 102 can be easily adjusted when looking at the distinctive marking 201.
[0102] [000102] Continuing with Figure 3, as illustrated in the cross section showing the support / fixture interface, fixture 102 has only three recesses 136, one for each primary projection 52a-52c on the coupling portion 44 of support 4. Thus, the body part 40 of the support 4 can only be received inside the socket in a rotational position.
[0103] [000103] If the coupling portion 44 had a minor secondary projection in addition to the three primary projections, then the fixing socket would have been provided with a fourth recess large enough to receive said minor secondary projection, but small enough to be unable to receive the three major primary projections 52a-52c. Thus, in this case too, there would be only one possible rotational alignment of the support / fixation interface. Thus, the user is prevented from selecting a support orientation which would be less appropriate in relation to the specific configuration of the jaw bone and gum.
[0104] [000104] Figure 4 illustrates a driver 200 coupling a fixation 202. The driver 200 is used to rotate the fixation 200 inside a hole in the jaw bone. The driver 200 can be a part which can be used by itself, or alternatively, at its coronal end (not shown), the driver 200 can be connected to a cable, a key (such as a ratchet wrench), a motorized driving machine, etc.
[0105] [000105] The driver 200 is provided with a visually distinctive marking 201, here illustrated as an axial line, aligned with one of the primary projections 252 on the coupling portion 244 of the driver 200. The distinctive marking 201 may have a color which is different from the rest of the driver 200, it may have a different texture, or be slightly protruding, or any other appropriate visible distinction compared to the rest of the driver 200. Although the distinctive marking 201 is of limited use in connection with a fixation without rotational limitation within of the jaw bone (such as the fixation in Figures 1 and 2), this is most useful in connection with a fixation that has a designated rotational orientation in the jaw bone (such as the fixation in Figure 3). With the last type of fixation, the actuator 200 can only be positioned in a single position of rotational indexing, meaning that each time the actuator engages such fixation, the rotational position of the distinctive marking 201 in relation to the fixation will always be the same. Thus, seeing the axial line, a user will be able to deduce the rotational position of the fixation 202 within the jaw bone. Although a trigger / clamp interface can be configured in the same way as the support / clamp interfaces illustrated in cross section in Figures 2 and 3, some alternative trigger / clamp interfaces will now be discussed.
[0106] [000106] Figures 5a-5c illustrate three different conceivable cross sections (along line V-V) of the driver / attachment interface in Figure 4, according to at least some exemplary embodiments of the invention.
[0107] [000107] In Figure 5a, the coupling portion of the driver is provided with three primary projections (illustrated here as equally dimensioned) 252 and a minor secondary projection 253. The minor secondary projection 253 is symmetrically arranged with respect to an extension direction of the radius of the coupling portion (and also with respect to the radius of the fixation). Each of the three primary projections 252 is, however, asymmetrically arranged with respect to a radius extension direction. Thus, in the exemplary mode illustrated, each of the three primary projections has a greater extension 255 in the counterclockwise direction with respect to the radius and a smaller extension 257 in the clockwise direction in relation to the radius. This could, of course, be vice versa, that is, the longest in the clockwise direction and the smallest in the counterclockwise direction.
[0108] [000108] This displacement or removal of projections is also reflected in the location of the recesses 236, 237 in the fixation. The recesses 236, 237 in the attachment are arranged in positions that substantially correspond to the locations of the projections 252, 253. Thus, three large recesses 236 are asymmetrically arranged with respect to the radius, while a small recess 237 is arranged symmetrically.
[0109] [000109] As the small recess 237 can only receive the small secondary projection 253 of the four projections of the coupling portion, there is only one rotational coupling position for the driver 200 in the fixing socket. Thus, this interface would be suitable for, for example, an inclined top fixation. It should be noted, that the only rotational position would also be obtainable without the small secondary projection and the small recess, thus only having the three primary projections 252 coinciding with the three large recesses 236, similar to the support / fixation interface shown in Figure 3. However, the presence of a fourth secondary projection 253 coinciding with another recess 237 provides the advantage that one more projection submits a driving force on the fixation 202 when the fixation 202 is being inserted into the jaw bone.
[0110] [000110] It should additionally be noted that the three primary projections 252 with or without the smallest secondary projection 253, should not be uniformly distributed around the circumference of the coupling portion 244. Thus, the distance between a pair of neighboring primary projections 252 is greater than the distance between any other pair (two other possible pairs) of neighboring primary projections.
[0111] [000111] In Figure 5b, the same driver 200 is used as in Figure 5a, however, the coupling fixture 202 'is different. The fixture 202 'in Figure 5b has four larger recesses 236, illustrated here as equally sized recesses, and can suitably be present in, for example, a flat top fixture. Each recess 236 is asymmetrically arranged with respect to a respective direction of extension of the radius of the fixation 202 '. The presence of four large recesses 236 means that a support can subsequently be connected to the fixture 202 'in any one of four rotational positions, and in the same way the driver 200 can engage the fixture 202' in any rotational position. Due to the displacement of the recesses 236, the smallest secondary projection 253 of the driver 200 will touch a side wall 239 of its receiving recess and thereby contribute to the transmission of a driving force for fixation.
[0112] [000112] It is assumed that for the interface in Figure 5b the driver 200 is rotated clockwise when inserting the fixation 202 'in the jaw bone. Thus, the thread spiral of fixation 202 'must be arranged so that following the spiral in a counterclockwise direction around fixation 202' would result in a spiral path going in the coronal direction.
[0113] [000113] In Figure 5c, the same fixation 202 is used as in Figure 5a, that is, three large displaced recesses 236 and a small symmetrical recess 237. Figure 5c illustrates that this fixation can also be used with a dental component such as a driver or support that has projections uniformly distributed (illustrated here as equally sized) 259. As shown, due to the displacement of the large recesses 236, all projections 259 of the driver will engage a side wall of a respective recess, even if the projections 259 be undersized in relation to the large recesses 236.
[0114] [000114] Figures 6a-6c exemplify one of numerous variations in projection and recess positions.
[0115] [000115] Figure 6a illustrates a cross section of a dental component according to at least one exemplary embodiment of the invention. Although the dental component is illustrated here as a support with a hollow hole, the projection arrangement is also applicable to other suggested dental components such as actuators, replicas, dressing covers and impression handles.
[0116] [000116] The coupling portion of the support comprises three primary projections radially extending 352a-352c. Following a course (clockwise) in the circumferential direction of the support coupling portion, a first projection 352a is provided at a first angle a1 of 225 ° with respect to a second neighboring projection 352b (measured center to center of the projections). The first and second projections are separated by a first distance D1. The second projection 352b is provided at a second angle a2 of 45 ° with respect to a third neighbor projection 352c. This pair of neighboring projections is separated by a second distance D2. The first distance D1 is greater than the second distance D2, and the first angle a1 is an integer multiple of the second angle a2. Finally, the third projection 352c is provided at a third angle a3 of 90 ° with respect to the first neighboring projection 352a. This pair of neighboring projections is separated by a third distance D3 which is smaller than the said first distance D1.
[0117] [000117] Figure 6b illustrates, according to at least one exemplary embodiment of the invention, a cross section of a fixture 302 which can receive the dental component of Figure 6a in eight different indexing positions. Eight equally sized recesses 336 are evenly distributed around the internal perimeter of the socket. Thus, the number of indexing positions available is, in this case, dependent on the number of recesses.
[0118] [000118] Figure 6c illustrates, according to at least one exemplary embodiment of the invention, a cross section of a fixture 302 'which can receive the dental component of Figure 6a in only one indexing position. The fixation socket has three recesses that project radially 336 'which mirror the projections of the dental component.
[0119] [000119] Figure 7 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention. The dental component has only two (illustrated here as equally sized) primary radial projections 452a-452b. Although illustrated here as being circumferentially displaced, that is, asymmetrically arranged with respect to a respective radius extension direction, an alternative would be non-displaced, that is, symmetrical. Following the path (hourly) around the circumference, the first projection 452a is separated from the second projection 452b at a first distance d1. Continuing the route, a second distance d2 separates the second projection 452b from a "subsequent projection", which is actually the first projection 452a. The first distance d1 is greater than the second distance d2. Optionally, one or more smaller projections 453 can be present on the area of the coupling portion covered by said first distance d1.
[0120] [000120] Figure 8 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention. The dental component has four radial projections 552a-552c, 553, each having a different size than the others. Of these four radial projections the three largest projections 552a-552c are considered as primary projections, while the smallest projection 553 is considered as a secondary projection. Secondary projection 553 is thus located in an area that has the greatest distance d1 'between two neighboring primary projections 552a and 552c. A fixture that has four corresponding matching recesses will only allow the dental component to be received in an indexing position. A fixture that has four properly distributed recesses matching the size of the largest projection 552c will allow the dental component to be received at any of four indexing positions. There are other alternatives as well. For example, a fixture that has a cut-out or saddle-shaped head can be suitably designed to allow the dental component to be received in either of two indexing positions (i.e., rotatable by 180 °). The two indexing positions can be achieved by having two large recesses which can receive the largest projection 552c and which are located opposite each other. The other two recesses are slightly smaller and are only able to receive the three smaller projections 552a, 552b and 553.
[0121] [000121] Figure 9 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention. The dental component has in addition to the four projections as illustrated in Figure 8, an additional fifth smaller 652d projection. However, in this modality, all five projections 652a-652e can be considered as primary projections. A first distance d1 "separates a first primary projection 652a and a second primary projection 652b. Said first distance d1" is greater than any other distance between neighboring projections, and the coupling portion area covered by said first distance d1 "is exempt from projections.
[0122] [000122] Figure 10 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention. Three primary projections 752a-752c are provided. No secondary projection is present. The greater distance d1 "'between the neighboring primary projections 752a and 752c is exempt from any additional projections.
[0123] [000123] Figure 11 illustrates a cross section of a dental component according to at least one other exemplary embodiment of the invention. The dental component has a generally square cross section from which three primary projections 852 and a minor secondary projection 853 are projecting radially. The dental component would mount on a correspondingly square-shaped fixing socket with recesses projecting radially. Similar to modalities that have a generally round or circular cross section, there are many alternative modalities conceivable also for the generally square cross section, or other polygonal shapes.
[0124] [000124] Figures 12a and 12b illustrate, according to at least one exemplary embodiment of the invention, a fixture 902 which can receive a dental component 900, 904 in only one indexing position. In this example, a transgingival fixation 902 is illustrated. Thus, similarly to the fixations previously illustrated, the present fixation has a bone apposition portion 907 adapted to be submerged within the bone tissue. In addition, the present fixation has a top portion 909 adapted to be located outside the bone. The dental component is illustrated here in the form of an actuator 900 (Figure 12a) or an inclined support 904 (Figure 12b). Similar to the dental component discussed in connection with Figure 7, the dental components in Figures 12a and 12b have only two (illustrated here as equally sized) primary radial projections 911, 913. However, unlike Figure 7, in which the projections radial projections are located on an external perimeter of the dental component, in Figures 12a and 12b, the radial projections 911, 913 are located on an internal perimeter of the dental component, the internal perimeter defining an internal space of the dental component which is adapted to mount on the top portion 909 of the fixture 902. The top portion 909 of the fixture 902 has two recesses 915 configured and sized to match the radial projections 911, 913.
[0125] [000125] The inclined support 904 in Figure 12b comprises a coupling portion 944 that has a first longitudinal geometric axis and a prosthesis receiving portion 946 that has a second longitudinal geometric axis. The first and second longitudinal geometric axes are inclined at a non-zero angle to each other. The radial projections 913 are located on the inner side of the coupling portion 944. It should be understood that properly configured inclined supports can be used in connection with other types of fixation as well, such as those illustrated in Figures 1-3.
[0126] [000126] As can be seen in Figure 12a, the actuator 900 has a distinctive marking 901 which can be useful, specifically when the fixation 902 is installed obliquely within the bone. In such a case an inclined support can be connected to the fixation, to ensure that the prosthesis receiving portion of the support will be correctly arranged within the jaw bone, thus allowing correct alignment of the prosthetic tooth with the surrounding teeth or correct alignment with a bridge structure. A dental professional can have a whole set of different angled supports, each having primary radial projections in different rotational locations in relation to the inclination of the prosthesis receiving portion. Thus, if the fixation is installed obliquely within the bone, the dental professional will notice by observing the distinctive marking 901, the rotational position of the recesses 915, and this will help him / her choose an inclined support from said set of supports which will provide the inclination correct inside the oral cavity.
[0127] [000127] Figure 13a schematically illustrates an indexing portion of a dental fixation 950 according to at least one exemplary embodiment of the invention. The fixture 950 comprises a wall 960 provided with a set of seven recesses radially extending 962a-962g. Following the circumference of the wall 960, a first distance separates a first recess 962a and a second recess 962b. A second distance separates the second recess 962b and a subsequent third recess 962c, wherein said first distance is greater than said second distance. The wall area covered by said first distance is free of recesses.
[0128] [000128] In this exemplary embodiment, continuing along the circumference of the wall, the distance between the third recess 962c and a fourth recess 962d corresponds to said second distance. Similarly, the respective distance between the following consecutive recesses (962d-962e; 962e-962f; 962f-962g; 962g-962a) corresponds to said first distance. In other words, the first, second, fourth, fifth, sixth and seventh recesses are evenly distributed around the wall, while the third recess 962c is interposed between the second recess 962b and the fourth recess 962d.
[0129] [000129] Figure 13b illustrates in cross section, according to at least one exemplary embodiment of the invention, a dental component 970 connected to the fixation 950 of Figure 13a. The dental component 970 can only be arranged in an index position. This has three radial primary projections 972a-972c which can only be mounted within said second, third and fourth recesses 962b-962d of the fixation. In other words, dental component 970 can be considered to have a first distance that separates a first primary radial projection 972a and a second primary radial position 972b, and a second distance that separates said second primary radial projection 972b and a third radial position primary 972c, in which said first distance is greater than said second distance, and in which the area covered by said first distance is exempt from projections. Thus, as illustrated in Figure 13b, the first projection 972a coincides with the fourth recess 962d, the second projection 972b coincides with the second recess 962b, and the third projection 972c coincides with the third recesses 962c. It can also be noted that, in this embodiment, the third primary radial projection 962c is interposed between the other two primary radial projections 972a, 972b and separated by the same distance from the other primary radial projections 972a, 972b.
[0130] [000130] Figure 13c illustrates in cross section another dental component 980 connected to fixation 950 of Figure 13a. The dental component 980 can be arranged in a plurality of (namely, six) indexing positions. The dental component 980 has six projections radially extending 982, which can match any of the recesses except for the third recess 962c.
[0131] [000131] Figure 13d illustrates in cross section, according to at least one exemplary embodiment of the invention, yet another dental component 990 connected in fixation 950 of Figure 13a. The dental component 990 can only be arranged in an index position. This has a set of six primary radial projections 992a, 992b, 992d, 992e, 992f, 992g, which are equidistantly distributed around the circumference of the coupling portion and at least one additional primary projection 992c which is interposed between two neighboring projections 992b, 992d, of said set of six primary radial projections equidistantly distributed. Thus, dental component 990 comprises a total of seven primary radial projections 992a-992g. Following the circumference of the coupling portion, a first distance separates a first primary radial projection 992a and a second primary radial projection 992b. A second distance separates the second primary radial projection 992b and a subsequent third primary radial projection 992c (i.e., said additional interposed projection), wherein said first distance is greater than said second distance. The coupling portion area covered by said first distance is free from secondary radial projections. In this exemplary embodiment, continuing along the circumference of the coupling portion, the distance between the third primary radial projection 992c and a fourth primary radial projection 992d corresponds to said second distance. Similarly, the respective distance between consecutive primary radial projections (992d-992e; 992e-992f; 992f-992g; 992g-992a) corresponds to said first distance. In other words, the first, second, fourth, fifth, sixth and seventh primary radial projections 992a, 992b, 992d, 992e, 992f, 992g are evenly distributed around the wall, while the third primary radial projection 992c is interposed between the second primary radial projection 992b and fourth primary radial projection 992d.
[0132] [000132] In the drawings of this specification, the primary projections and the secondary projections of the dental components, as well as the corresponding recesses in the fixings, were illustrated as being substantially rectangular. However, it must be understood that such projections and drawdowns can take other alternative forms. For example, these can be slanted, trapezoidal, triangular, curved, rounded, etc.

权利要求:
Claims (14)
[0001]
Dental component (4, 200, 990), which comprises a coupling portion (44, 244) for coupling the dental component to a dental fixation (2, 202) adapted to be inserted into a jaw bone, the coupling portion being provided with at least two equally sized primary radial projections (52, 252, 852, 992a-992g), which are distributed along the circumference of the coupling portion and which are adapted to be received within corresponding recesses (36, 136 , 236, 962a-962g) provided in the fixation, wherein, following the circumference of the coupling portion, a first distance (L1) separates a first primary radial projection (52a) and a second primary radial projection (52b), and a second distance (L2) separates said second primary radial projection (52b) and a subsequent primary radial projection (52c), in which said first distance is greater than said second distance, and wherein the area of the coupling portion (54) covered by said first distance is free of projections or provided with a secondary radial projection (253, 853) which, in at least one direction, is smaller than each of said primary radial projections , characterized by the fact that the coupling portion is provided with a set of primary radial projections (52a, 52b, 252, 992a, 992b, 992d, 992e, 992f, 992g), which are evenly distributed around the circumference of the portion coupling and at least one additional primary radial projection (52c, 252, 992c) which is interposed between two neighboring projections of said set of primary radial projections equidistantly distributed.
[0002]
Dental component (4, 200, 990) according to claim 1, characterized in that the coupling portion (44, 244) is provided with a plurality of said primary radial projections (52, 252, 852, 992a-992g ) distributed along the circumference of the coupling portion, wherein said first distance separates a first pair of neighboring primary projections, and said second distance separates any other pair of neighboring primary projections, where, between said first pair of projections neighboring parts, the coupling portion is free of projections or provided with a secondary radial projection (253, 853) which, in at least one direction, is smaller than said primary radial projections.
[0003]
Dental component (4, 200, 990) according to claim 1 or 2, characterized in that the coupling portion (44, 244) comprises a wall portion of which said primary projections (52, 252, 852, 992a-992g) project radially, in which, following the circumference of the wall portion, a first geometry axis extending from the center of the coupling portion to said first projection forms a first angle with respect to a second geometry axis extending from the center of the coupling portion to said second projection, whereas said second geometric axis forms a second angle with respect to a subsequent geometric axis that extends from the center of the coupling portion to said subsequent projection, wherein the first angle is an integer multiple of said second angle.
[0004]
Dental component (4, 200, 990) according to any one of claims 1 to 3, characterized in that the coupling portion (44, 244) is provided with at least three of said primary radial projections (52, 252, 852, 992a-992g), one (52c, 252, 992c) of which is interposed between the other two and separated by the same distance from the other two.
[0005]
Dental component (4, 990) according to any one of claims 1 to 4, characterized in that a component selected from the group consisting of a support, a replica support, a blank support (abutment blank), an actuator , a dressing cover and an impression grip element.
[0006]
Dental component (4, 990) according to any one of claims 1 to 5, characterized in that it is in the form of a support comprising a body part (40) and a screw part (42), wherein the body part comprises - said coupling portion (44), - a prosthesis receiving portion (46) which extends coronally from the fixation, and - a hollow hole (56) that extends through the body part, wherein the screw part is adapted to be inserted into the hollow hole and to engage an internal thread (38) of the fixture (2) in order to secure the body part in the fixture.
[0007]
Dental component according to claim 5 or 6, characterized in that it is in the form of an inclined support in which the coupling portion has a first longitudinal geometric axis and the prosthesis receiving portion has a second longitudinal geometric axis, in that the first and second longitudinal geometry axes are inclined at a non-zero angle to each other.
[0008]
Dental component according to any one of claims 1 to 5, characterized in that it is in the form of a driver (200) for driving the fixation (202) into the jaw bone, in which the driver is provided with a mark distinctive (201) to indicate to a user the rotational position of the fixation in relation to the jaw bone as the fixation is being driven into the jaw bone.
[0009]
Dental fixation (2, 202, 950) for insertion in a jaw bone, which comprises a wall provided with a set of at least two recesses that extend radially equally dimensioned (36, 136, 236, 962a-962g), in which the recesses are arranged along the circumference of the wall, each recess being configured to receive any one of at least two primary radial projections (52, 252, 852, 992a-992g) provided on a coupling portion of a dental component (4, 200, 990), wherein, following the circumference of the wall, a first distance separates a first recess and a second recess from said set of recesses, and a second distance separates said second recess and a subsequent recess from said set of recesses, wherein said first recess distance is greater than the said second distance, wherein the wall area covered by said first distance is either free of recesses or provided with a different recess which extends radially which in at least one direction is smaller than each of the recesses in said recess set, characterized by the fact that said wall is provided with a set of recesses which extend radially (36, 136, 236, 962a, 962b, 962d, 962e, 962f, 962g), which are distributed equidistantly around the circumference of the wall and at least one recess which extends radially further (136, 962c) which is interposed between two adjacent recesses of said set of recesses which extend radially distributed equidistantly.
[0010]
Dental fixation (2, 202, 950) according to claim 9, characterized in that said set of recesses (36, 136, 236, 962a-962g) comprises a plurality of recesses that extend radially distributed along the circumference of the wall, wherein said first distance separates a first pair of neighboring recesses, and said second distance separates any other pair of neighboring recesses, wherein, between said first pair of neighboring recesses, the wall is either free of recesses or provided with a different radially extending recess which in at least one direction is smaller than any recess in said recess set.
[0011]
Dental fixation (2, 202, 950) according to claim 9 or 10, characterized by the fact that, following the circumference of the wall, a first radial geometry axis extending from a central longitudinal geometry axis to said first recess forms a first angle with respect to a second radial geometry axis extending from the central geometry axis to said second recess, whereas said second radial geometry axis forms a second angle with respect to a subsequent radial geometry axis extending from the central geometry axis to said subsequent recess, wherein the first angle is an integer multiple of said second angle.
[0012]
Dental fixation (2, 202, 950) according to any of claims 9 to 11, characterized in that said wall is provided with a set of at least three radially extending recesses (36, 136, 236, 962a -962g), one of which is interposed between the other two and separated by the same distance from the other two.
[0013]
Dental implant assembly, characterized in that it comprises a dental component (4, 200, 990) as defined in any one of claims 1 to 8, connected to or to be connected to a fixation (2, 202, 950) as defined in any of claims 9 to 13, wherein the dental component has only one possible indexing position in relation to the fixation.
[0014]
Dental implant assembly, characterized by the fact that it comprises a dental component (4, 200, 990) as defined in any one of claims 1 to 8, connected to or to be connected in a fixation (2, 202, 950) comprising a wall provided with a plurality of radially extending recesses, wherein the recesses are arranged sequentially along the circumference of the wall, each recess being formed to receive one of said plurality of primary projections provided on the coupling portion of the dental component, wherein the number of said recesses is greater than the number of said primary projections, hereby allowing the dental component to be positioned in any one of a plurality of indexing positions in relation to the fixation.

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CN109223210A|2019-01-18|

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WO2012052480A3|2012-06-21|

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JP6139407B2|2017-05-31|

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WO2012052480A2|2012-04-26|

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RU2576605C2|2016-03-10|

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RU2013122635A|2014-11-27|

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法律状态:
2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-09-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-06-30| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2020-09-08| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/10/2011, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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EP10188218A|EP2444023A1|2010-10-20|2010-10-20|A dental component, a dental fixture, a dental implant assembly and a dental implant system|

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