• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SCREW AND SCREW WRENCH. The invention relates to a screw and a corresponding screwdriver for inserting the screw into a dental implant at an angle to the longitudinal axis of the implant. The screw has a polygonal interface and the screwdriver has an adaptation interface to make the screw rotate.
    公开号:BR112014000245B1
    申请号:R112014000245-2
    申请日:2012-07-05
    公开日:2020-10-13
    发明作者:Haus Adrian
    申请人:Nobel Biocare Services Ag；
    IPC主号:
    专利说明:

    The present invention relates to methods and devices for fixing dental implant components to a patient's jaw bone. More specifically, the invention relates to the manipulation of screws in dental components with corresponding screw channels, in order to protect the dental component for the dental implant.
    Figure 1 shows an arrangement for replacing a single tooth prosthesis with angled screw channels. The dental implant (110) comprises a screw channel (130) which has an internal thread configured to match the screw thread (160) in such a way that the screw (160) can be attached to the implant. The prosthesis (120) is attached to the dental implant, using the screw (160). The prosthesis passes through the gingival tissue to the dental implant (110). The prosthesis has a screw channel (190), through which the screw (160) is inserted. The screw channel (190) has a screw channel outlet (180) and a screw seat (140) at the base of the prosthesis, where the head (170) of the screw (160) is engaged when the prosthesis is attached to the implant with the screw. According to the present invention, the axis of the screw channel (190) (i.e., the line defined by the radial center point of the channel at any time) does not follow the axis of the channel (130). In fact, the screw channel (190) can be straight, but mainly oriented at a different angle to the channel (130). Alternatively, the axis of the screw channel (190) can be curved or S-shaped. As a result, the axis of the screw channel (190) at the outlet of the channel (180) does not coincide with the axis of the channel (130) , or the seat of the screw seat 140.
    The problem that arises from this arrangement is how to insert the screw through the angled screw channel and, since the screw is coupled with the dental implant, how to drive the screw to rotate using an angled screwdriver at a significant angle with the longitudinal axis of the screw. What is needed is a means of interface between the screw and a screwdriver in a way that allows the screw to be manipulated during insertion into the prosthesis and driven to rotate from an angle to the longitudinal axis of the screw.
    US 2010167240 describes a screwdriver for operating a screw to rotate from an angle by 10 with respect to the screw axis. A ball screw head wrench is described, in which the ball head wrench apparently provides an interface between the screw wrench and the screw, even when the screw wrench is presented at an angle to the 15-axis screw.
    According to a first aspect of the invention, a screw is provided for a dental application (in other words, a dental screw), the screw having a coronal end and an apical end and 20 comprising a hole extending from the coronal end of the screw to the along a portion of the screw towards the apical end of the screw, a first series of equally spaced recesses arranged circumferentially around an internal surface of the hole, each recess extending a length from the coronal end of the hole in towards the apical end of the orifice. The length of each recess is inclined with respect to the longitudinal axis of the screw such that the recess is further away from the longitudinal axis of the screw at a point parallel to the coronal end of the hole than at a point below the coronal end of the screw. hole. Each pair of adjacent recesses is connected by a contact surface on the inner surface of the hole, each contact surface 35 extending a length from the coronal end of the hole to the apical end of the screw.
    Each contact surface is inclined from the longitudinal axis of the screw in such a way that the surface is further away from the longitudinal axis of the screw at a point parallel to the coronal end of the orifice than at a point 5 below the coronal end of the orifice.
    At least a portion of the inner surface of the orifice comprises a layer of titanium nitride. The apical end of the orifice may be tapered, having a wider portion at the apical end of the recesses. In one embodiment, the screw is adapted to attach a dental component to a dental implant. In another embodiment, the screw (itself) is a dental component directly attachable to a dental implant, in which the dental component can be selected from group 15 which comprises: a cover screw, a healing abutment, a hood, etc.
    According to another aspect of the invention, a screwdriver is provided for driving a screw for fixing a dental component to a dental implant, the screwdriver comprising a screwdriver head having an apical and coronal end , the key head comprising at least a first and a second portion having a polygonal cross section in a radial plane of the longitudinal axis of the key, a first portion having a substantially rounded cross section in the axial plane of the longitudinal axis of the key, a second portion apically linked with respect to the first portion, the second portion having a substantially triangular tapered shape towards the apical end of the key head in the axial plane of the longitudinal axis of the key.
    The screw wrench head may comprise a tip portion at the apical end of the wrench head having a polygonal cross section in a radial plane of the longitudinal axis of the wrench and a curved apical end.
    At least a portion of the key head surface may comprise a layer of titanium nitride.
    According to another aspect of the invention, a method of attaching a dental component to a dental implant comprises the steps of inserting the key head of a screwdriver described above into the hole of any of the screws described above in such a way that the edges of the wrench head defined by the polygonal cross section fit within the screw recesses, apply sufficient force to the wrench so that the wrench head grips the screw by means of a transport function, manipulate the screw through of a screw channel of the dental component using the transport function until the screw is received in a threaded hole in the 15 dental implant, make the screw rotate using the screwdriver, such that the edges of the wrench head defined by the polygonal cross section of the key head portions smoothly transmit rotational force to the screw, regardless of the angle of the key's longitudinal axis in relative to the longitudinal axis of the screw.
    Aspects of the present invention will now be described by way of example with reference to the accompanying drawings, in which:
    Figure 1 shows a prosthesis having an angled screw channel and a corresponding screw.
    Figures 2A and 2B show the angle of the key (not shown in scale) from the longitudinal axis of the screw, during the process of inserting a screw into a prosthesis in Figure 1.
    Figures 3A to 3D show an embodiment of the screw according to the invention.
    Figures 4A to 4C show an embodiment of a screwdriver according to the invention.
    Figures 5A to 5C show the screw in cooperation with the screwdriver head.
    Figures 6A and 6B show an embodiment of a cover screw according to the invention.
    Specific embodiments of the invention will now be described with reference to the accompanying drawings. This invention can, however, be realized in many different ways and should not be interpreted as being limited to the embodiments presented herein; conversely, these embodiments are provided for this disclosure to be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. The terminology used in the detailed description of the embodiments illustrated in the accompanying drawings is not intended to limit the invention. In the drawings, the same numbers refer to similar elements. Screw
    The present invention provides a method and apparatus for inserting a screw into a dental component that has an angled screw channel and screw fixation within a dental implant, thereby fixing the dental component to the dental implant.
    A screw with a screw interface according to the preferred embodiment of the present invention is shown in Figures 3A to 3D. Screw (160) comprises screw head (310) having a screw interface (300). The screw interface (300) comprises a hole in the screw head with an internal polygonal shape configured to cooperate with the key head (400), described later in this report. As shown in figure 3A, screw interface (300) comprises conical inner walls (320), conical section (330), beveled or rounded interface edges (340) and recesses (350).
    In the preferred embodiment, the screw interface (300) comprises six equally spaced recesses (350) arranged circumferentially on the internal surface of the screw interface. An equivalent screw head with a number greater or less than six recesses is also provided. Each recess extends from the top surface of the screw head with a small angle (for example, 2.5 degrees) inward, from the longitudinal axis of the screw towards the tapered section (330). Between the recesses are sloping flat surfaces (320), tapered out towards the mouth of the screw interface. As a consequence, the inner surfaces (350) and (320) describe a slightly tapered inner space such that the largest diameter of the screw interface mouth is greater than the largest diameter, at the point where the tapered surfaces (320) meet. meet with the lower conical section. In one embodiment, the tapered surfaces (320) are inclined 2.5 ° with respect to the longitudinal axis of the screw.
    The conical section (330) comprises the lower portion of the screw interface (300). At the widest point of the cone, the conical section (330) meets the recesses (350) and the internal conical surfaces (320). The cone shape of the section (330) then narrows towards the truncated head (360) at the inner end of the screw interface. The cone (330) provides extra support for the edges of the screw head (310) when the screw is inserted firmly into a screw seat. While a flat bottom surface (e.g., truncated portion (360) having the width of the interface) can allow the edges to deform plastically, inwardly while the screw is screwed tightly into a screw seat, the conical shape (330) provides greater support for the edges (310).
    The mouth of the screw interface (300) comprises six beveled or rounded edges (360) that connect the upper surface of the screw head (310) and tapered internal surfaces (320).
    Figure 6A is a cross-sectional side view, and Figure 6B is a perspective view of an embodiment of a cover screw (160 ') according to the invention. The cover screw (160 ') is generally adapted to completely cover the upper portion (i.e., the coronal end) of a dental implant, for example, the dental implant (110). The cover screw (160 ') comprises a screw head (310)'. The screw head (310 ') comprises an apical flat circumferential surface (370'). The surface (370 ') is orthogonal to the longitudinal axis of the cover screw (160'). The surface 15 (370 ') is adapted to rest on the dental implant and cover the top of the dental implant.
    The screw head (310 ') further comprises a screw interface (300). The screw interface (300) is of the same type as the screw interface (160) described 20 with respect to figures 3A to 3D. Therefore, the same wrench or tool can be used to manipulate both the screw (160) and the cover screw (160 '). The description of the screw interface (300) will not be repeated here. 25 At the apex of the surface (370 '), the cover screw (160') comprises a conical section (380 "), which narrows towards the apical end of the cover screw (160 '). The conical section (380' ) is adapted to lean against a corresponding tapered section of the dental implant (internal tapered connection), when the cover screw (160 ') is screwed into the implant.
    At the apex of the conical section (380 '), the cover screw (160') comprises a portion with external thread (390 ') for engagement with a corresponding threaded portion 35 internally of the dental implant, so that the cover screw (160 ') can be attached to the dental implant.
    The screw interface (300) can also be applied to other dental components in addition to the cover screws, such as healing abutments, impression copings, etc. Screw wrench
    According to the preferred embodiment of the invention shown in Figures 4A to 4C, the screwdriver head (400) comprises a polygonal shape in the radial plane (i.e., the plane perpendicular to the longitudinal axis of the key) and a spherical shape in the axial plane.
    In particular, the preferred embodiment of the key head (400) has a polygonal cross section, as shown in Figure 4A. In the preferred embodiment, the polygonal cross section has six sides. However, an equivalent wrench head with more or less than six sides (corresponding to the number of recesses in the screw interface) is provided. The sides of the polygons form surfaces (410) that extend between the edges (420)
    In Figure 4B, the screwdriver head is shown in a side perspective. To describe the screwdriver head, it is divided into portions (430), (440), (450), (460), and (470).
    The edges (410) of the apical end portion (470) describe a circular curve, where all edges (410) meet. The circular curve of the edges at the apical end portion (470) describes a rounded head in the axial plane.
    The edges (410) of the portion (460) describe a straight line, so that the portion (460) comprises the shape of a truncated polygonal pyramid, truncated towards the apical end (470) in such a way that the surfaces of the portion ( 460) smoothly meet the surfaces of the portion (470).
    The edges (410) of the apical end portion (450) describe a circular curve connecting the edges of the portion (460) to the portion (440). The circular curve is that which gives the portion (450) a truncated sphere shape in the axial plane.
    The edges (410) of the portion (440) describe a straight line, so that the portion (460) comprises the shape of a truncated polygonal pyramid, narrowing away from the apical end (470) in such a way that the surfaces of the portion (450) smoothly meet the surfaces of the portion (430).
    The portion (430) is the place where the surfaces (420) meet the cylindrical axis of the screwdriver. Cooperation between the key head and the screw interface
    As shown in Figures 5A to 5C, the characteristics of the key head and the corresponding screw interface are configured to allow the key head to be inserted into the screw interface and the screw to be driven by the key to rotate at an angle in relative to the longitudinal axis of the screw.
    After the initial insertion of the key head into the screw interface, chamfered (or rounded) edges (340) of the mouth of the screw interface guide the tip of the screw key head into the screw hole. This makes the process of loading the screwdriver head into the screw simpler and requires less precise spatial coordination of the person handling the screwdriver / screwdriver.
    The screwdriver head is then rotated until the edges (410) align with the recesses (330). At this point, the edges (410) fit into the recesses (330) and the screwdriver head will obtain rotation adhesion with the screwhead. The recesses allow the wrench head to be smoothly rotated at an angle to the longitudinal axis of the screw without a locking collision between the surfaces of the wrench head and the screw interface causing the wrench head to be rotationally locked. on the screw.
    As shown in Figure 5A, if the screw head is inserted into the screw interface at a corresponding angle, or close to it, the longitudinal axis of the screw, the conical portion (460) will rest against the inner cone (330) to provide an adjustment comfortable and the key can be activated to turn the screw.
    If, as shown in Figures 5B and 5C, the screw head is inserted into the screw interface at a significant angle from the longitudinal axis of the screw (that is, greater than 5 degrees), the rounded apical end (470) meets the inner cone (330) at a point above the truncated end (360) of the inner cone. This prevents the screw head from entering the screw interface as deeply as when the screw head is inserted into the screw interface at an angle close to the longitudinal axis of the screw. At the same time, the rounded edges (410) of the portion (450) fit into the recesses (350). In the preferred embodiment, the angle of inclination of the inner cone (330) is chosen to ensure that the depth at which the wrench head enters the screw head is dependent on the angle with respect to the longitudinal axis of the screw at which the key is inserted. By controlling the depth at which the screw head enters the screw interface, the rounded edges (410) of the portion (450) can be controlled to contact the recesses (350) within an ideal range of the length of the recesses (350), that is, not too close to the mouth of the screw interface in such a way that the screwdriver head slides out of the rotation constriction with the screw, and not so close to the inner end of the screw interface that the rounded portion (450 ) contact the inner tapered portion (330) and introduce extra friction or force the screw head back out of the screw interface. In one embodiment, the optimal contact range for the round portion (450) in the recesses (350) is between the points describing 25% and 75% of the length of the recess. By ensuring that a portion of the rounded edges contacts the tapered portion (330) within this range, an optimal play is achieved between the screw and the screwdriver to allow angled rotation of the screw. Once the wrench head is moved to rotate, the rounded shape of the portion (450) in the recesses (350) allows the screw to be rotated at an angle to the longitudinal axis of the wrench.
    The surface (460) of the key also provides extra contact surface during the driving process. For a round wrench head, each end in the recess curves out of the recess, after the point where the edge and surface of the recess were in contact. The straight surface does not curve out of the recess and provides a degree of contact with the surface to the end of the recess.
    In the preferred embodiment of the invention, the slight angulation of the recesses (350) and the surface (320) from the longitudinal axis of the screw provides a transport function for the key head. The small angle means that if the screw head is pushed into the screw interface with a certain force, the edges (450) are pushed into the recesses (350) with an increasingly tight fit. After a certain point is reached, the surfaces of the key head are pressed against the inner surface of the screw interface so tightly that the resulting friction adjustment allows the screw to be picked up by the key head and transported without any screw support. This is called the transport function and can be vital to simplify the process of installing the screw on a dental implant. In the preferred embodiment, the preferred configuration of the key head and the interface allows the transport function to exist, even when the key head is inserted at an angle to the longitudinal axis of the screw. This is particularly advantageous when inserting a screw into an angled screw channel (as shown in figures 2A and 2B). In addition, the preferred configuration of the switch head and interface allows the contact position of the rounded portion 10 (450) to be controlled to be within the optimum range, and thus the ideal amount of friction to achieve the transport function can also be controlled.
    In a preferred embodiment of the invention, one or both surfaces of the wrench head or the internal surface of the screw interface are coated with a coating, such as titanium nitride, which increases the friction between the components. This provides an enhanced transport function between the key head and the screw interface and reduces the risk that the screw will loosen.
    In an alternative embodiment of the invention, the number of recesses in the screw interface is greater than six. An increase in the number of recesses provides a smoother action between the cooperation surfaces of the screw interface during rotation of the screw by the wrench head.
    权利要求:
    Claims (8)
    [0001]
    1. Combination of a screw (160; 160 ') for a dental application, and a screwdriver for driving the screw (160; 160') for fixing a dental component to a dental implant, characterized by the fact that the screw has a coronal end and an apical end and comprises: a hole extending from the coronal end of the screw along a portion of the screw towards the apical end of the screw, a first number of equidistant recesses (350) arranged circularly in around an internal surface of the orifice, each recess extending a length from the coronal end of the orifice towards the apical end of the orifice; where the length of each recess is inclined with respect to the longitudinal axis of the screw such that the recess (350) is further from the longitudinal axis of the screw at a point parallel to the coronal end of the hole than at a point below the coronal end of the orifice, where each pair of adjacent recesses (350) is connected by a contact surface (320) on the inner surface of the orifice, each contact surface (320) extending a length from the coronal end of the orifice towards the apical end of the screw, and where each of the contact surfaces (320) is angled away from the longitudinal axis of the screw such that the surface is farthest from the longitudinal axis of the screw at a point parallel to the coronal end orifice than at a point below the coronal end of the orifice, the key comprising a key head (400) having an apical end and a coronal end, the key head and comprising at least a first and a second portion having a polygonal cross section in a radial plane of the longitudinal axis of the key, the first portion (450) having a rounded cross section, in the axial plane of the longitudinal axis of the key, the second portion (460) being apically linked with respect to the first portion, the second portion having a triangular shape that tapers towards the apical end of the wrench head (400) in the axial plane of the longitudinal axis of the wrench.
    [0002]
    2. Combination according to the fact that the internal surface of the titanium nitride orifice. according to claim 1, at least a portion of the comprises a layer of
    [0003]
    Combination according to claim 1 or 2, characterized by the fact that the apical end of the orifice is conical (330), having a wider portion at the apical end of the recesses (350).
    [0004]
    4. Combination according to any one of the preceding claims, characterized in that the screw (160; 160 ') is adapted to fix a dental component to a dental implant.
    [0005]
    Combination according to any one of claims 1 to 3, characterized in that the screw (160; 160 ') is a dental component directly coupled to a dental implant.
    [0006]
    6. Combination according to claim 5, characterized by the fact that the dental component is selected from the group comprising: a cover screw, a healing abutment, and an impression cap.
    [0007]
    Combination according to claim 1 characterized in that the key head (400) comprises a tip portion at the apical end of the key head with a polygonal cross section in a radial plane of the longitudinal axis of the key and one end apical curve.
    [0008]
    Combination according to claim 1 or 7, characterized in that at least a portion of the key head surface comprises a layer of titanium nitride.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3005975B1|2020-06-17|
    KR20140061377A|2014-05-21|
    CN103648431A|2014-03-19|
    US20180028288A1|2018-02-01|
    EP3005975A1|2016-04-13|
    CN106937887A|2017-07-11|
    KR102044794B1|2019-11-14|
    ZA201308760B|2015-09-30|
    AU2020201077B2|2021-05-27|
    AU2020201077A1|2020-03-05|
    US9763754B2|2017-09-19|
    EP2729085A1|2014-05-14|
    BR112014000245A2|2017-06-13|
    AU2012280708A1|2014-01-23|
    CN103648431B|2017-05-17|
    US20140186797A1|2014-07-03|
    CN106937887B|2020-02-11|
    JP2014520578A|2014-08-25|
    EP2729085B1|2015-09-16|
    JP5980323B2|2016-08-31|
    AU2017200860A1|2017-03-02|
    ES2551863T3|2015-11-24|
    AU2018253625B2|2019-11-14|
    AU2018253625A1|2018-11-22|
    WO2013004386A1|2013-01-10|
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    法律状态:
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-31| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-07-21| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-10-13| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/07/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    GBGB1111561.5A|GB201111561D0|2011-07-06|2011-07-06|Driver tool|
    GB1111561.5|2011-07-06|
    GB1117590.8A|GB2495513A|2011-10-12|2011-10-12|Dental screw and driver|
    GB1117590.8|2011-10-12|
    PCT/EP2012/002826|WO2013004386A1|2011-07-06|2012-07-05|Screw and driver tool|
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