• 专利附录
  • 专利说明
  • 权利要求
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    • 专利摘要:
    SUMMARY The invention relates to a helical implant for anchoring in bone and having an anchoring end and an application end. The application end has socket means (4, 5) for cooperating with a screw-in instrument (101) and application means for applying a prosthesis-related element. According to the invention, the socket means (4, 5) comprises an internal (4) and an external (5) socket part for unison co-operation with the screw-in instrument (101) during screw-in. The internal socket part (4) has an axial recess limited by a profile which in a section perpendicular to the longitudinal axis of the implant deviates from a circle. The external socket part (5) is formed by the outside of the application spirit and has a profile which in a section perpendicular to the longitudinal axis of the implant deviates from a circle. The invention also relates to a screw-in instrument (101) with mounting means (104, 105) for applying torque to socket means of an implant in accordance with the invention. Furthermore, the invention relates to a method for screwing in an implant in accordance with the invention, including a screwing-in instrument (101) in accordance with the invention. (Figs. 1 and 6)
    公开号:SE1251073A1
    申请号:SE1251073
    申请日:2012-09-24
    公开日:2014-03-25
    发明作者:Rickard Brånemark；Thomas Svensson
    申请人:Brånemark Integration Ab；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The present invention relates to a helical implant for anchoring in bone, preferably a jawbone, which implant comprises an anchoring end and an application end, which anchoring end is provided with a screw thread for screwing in and neck screwing. which application end is provided with socket means for co-operation with a screw-in instrument and with application means for applying a prosthesis-related element such as a spacer element.
    The invention relates in a second aspect to an ice-screwing instrument for anchoring a helical implant in bone, preferably in jawbone, by screwing in the implant, which instrument is provided with mounting means for applying torque to socket means of the implant.
    From a third aspect, the invention relates to a method for anchoring a helical implant.
    Terms such as "axial", "radial" and "direction of rotation" in the present invention are related to the center axis defined by the helical implant.
    Background of the Invention It is a 'sharp edge' to permanently anchor oral and extraoral prostheses in bone tissue using helical titanium fasteners. These kanda implants, fixtures, basically consist of a cylindrical screw with an external thread.
    The implant is intended to be inserted into a pre-drilled hall in the jawbone for permanent anchoring of artificial teeth and dental bridges. The upper part of the implant is intended to be joined to a spacer element and has a connecting surface against which the spacer element abuts in the applied position. Implants of this kind further have a Than this upper connecting surface projecting part which is designed as a key grip which is used when the fastening element is screwed into the pre-drilled tail. This projecting part is also arranged to cooperate with and form a rotational welding for the spacer element and is usually designed as a hexagon. SE 513 111 describes an implant which comprises two than geometrically separated sockets where a first, internal socket cooperates with the tool and a second, external socket cooperates and enables rotational welding of the spacer element. An advantage of such a solution where the tool socket and the spacer socket are geometrically separated from each other is that the force application Than tool does not mechanically affect and risks damaging the external socket (hexagon) but this can be optimized for positioning the spacer element. Another advantage is that the internal tool socket can be designed in such a way that a simple bar function of the implant is allowed, in this case by means of a conformal has the part of the tool which engages with the internal socket of the implant. Furthermore, such a socket arrangement allows the technology with fixture holders or intermediate elements not to be adapted, which has previously been a dominant method in anchoring implants. Using an internal tool holder as the only cooperating part with the tool / instrument can, however, present problems when it comes to talking about the high torques that can arise when installing the implant in hard bone tissue. This problem has been accentuated when using wider implants, for example fixtures with a diameter of 5 mm. A wider (wider) fixture requires a higher rotating torque when screwing in the leg. This means that the internal tooling becomes very tolerant if it is to occupy the entire rotating component, not least through the built-in lifting / carrying function in the form of cooperating conical surfaces.
    The spirit of the present invention is to overcome the problems associated with prior art in the art. The breathability is thus to provide socket means on the implant which avoids the disadvantages described above, partly since the socket means also constitutes application means and partly because the socket means are completely separate from the application means.
    This breathalyser is from the first aspect of the invention in that an implant of the type stated in the preamble of claim 1 comprises the special features stated in the jugging part of the claim. The socket means of the implant thus comprise an internal socket part and an external socket part for unison cooperation with the screwing-in instrument, which internal socket part comprises an axial recess bounded by a profile which in a section 3 perpendicular to the long axis of the implant deviates Than a circle, and which external socket part at least a part of the outside of the application spirit which has a profile which in a section perpendicular to the long axis of the implant deviates from a circle.
    Due to the fact that the socket means in this way has an inner part and an outer part, the screw-in torque can be distributed on these parts so that each of them only needs to transfer a part of it. This reduces the risk of the internal part being exposed to overload. There is greater freedom to design and dimension this in compliance with other conditions, such as incorporating a lifting function and reducing the requirement for precise tolerances. The outer part may absorb a torque which is considerably less than that required in the other end part of the socket. A smaller torque on the outer surface entails less risk of damage to it from the screw-in instrument and therefore does not reduce its possibility of being used for other functions as well. It should be understood that each profile can vary in size in said respective sections, i.e. the profile surface can be inclined in relation to the axial direction. For example. the inner profile surface can diverge towards the application spirit externally and the inner can converge in a corresponding manner.
    According to a preferred embodiment of the implant, at least a part of the external socket part is arranged to also form at least a part of the application means.
    In this case, it is advantageously used that the external socket part is initially not damaged by the screw-in instrument so that it also functions with satisfactory effect for rotational welding of the spacer element. The fact that the outer socket part in this way fulfills two different functions without risk of lack of functionality is the most important advantage gained with the general inventive side.
    According to a further preferred embodiment, the external socket comprises an external polygon profile.
    According to a further preferred embodiment, the internal socket comprises an internal polygon profile.
    Although other profiles naturally fall within the scope of the general inventive idea, the polygon shape is a proven and well-lit profile for coin transfer both in inner and outer socket, for which reason this is preferred. The polygon is suitably regular and can advantageously be designed like a hexagon. According to a further preferred embodiment, the outer polygon profile and the inner polygon profile are congruent with each other and have their respective horns coated opposite each other in the direction of rotation.
    This facilitates production and also means that the material thickness between the internal and the external socket becomes as even as possible without the minima that would otherwise occur and risk distortion or breakage. Damned makes it possible that the internal socket can be made with a large dimension in the lateral direction or otherwise, which contributes to 6kad torque transmission.
    According to an alternative preferred embodiment, the internal socket comprises at least two axial grooves in the recess.
    As a result, it can be adapted to any type of standard socket such as a torx socket or the like, which provides manufacturing advantages as far as the saval implant as a screw-in instrument is concerned. In addition, this embodiment makes it easier to impart a lifting function to the internal socket. The number of spares is advantageously large in two. According to a further preferred embodiment, the external socket comprises lifting means for axial force cooperation with the screw-in instrument.
    When an implant is to be attached, it must be moved than its storage location, e.g. a package for the tail in the leg. It is a broken edge to secure it with the aid of the screw-in instrument by making the internal socket conical in order to have a frictional interaction with the implant large enough to lift and move the implant. However, there is a risk that the attachment will come loose and that the implant will be dropped. By designing the external socket part with lifting means for this purpose, it is possible to have a safer lifting effect with less risk of the implant being dropped during the transfer than the storage site to the leg. In particular, it is omitted to arrange a form-fitting power connection between the implant and the instrument when it is located to the external socket part.
    According to a further preferred embodiment, the lifting means comprises at least one radially misaligned gripping recess coated on the outer axially coated spirit of the Than application spirit of the external socket.
    The grip recesses are a simple way of creating gripping surfaces for shape-bound interaction with the instrument. The specified location means that the lifting function can be achieved without significantly affecting the torque transferring function of the socket. Preferably, two or more such gripping recesses are provided to achieve force symmetry.
    According to a further preferred embodiment, the grip recess or recesses are coated at a respective polygon horn of the profile of the outer socket.
    In these stables, it is easiest to obtain a sufficient grip with relatively small recesses.
    The raised breathable needle is derived from the second aspect of the invention in that a screw-in instrument of the type specified in the preamble of claim 1 has the special features stated in the jug-shaped part of the claim. Thus, the applicator comprises an axially extending first part and an axially extending second part, which first part is delimited by an outer profile which in a section perpendicular to the axial direction deviates from a circle and which second part is delimited by an inner profile which in a section perpendicular to the axial direction deviates from a circle, and which second part is arranged at a large radial distance from the center axis of the applicator to the first part, the instrument being arranged for screwing in an implant with socket means having an internal socket part and an external socket part.
    According to preferred embodiments of the invented instrument, its first part and its second part have a geometry adapted for screwing in implants with socket parts in accordance with what is stated in the preferred embodiments of the implant.
    According to a further preferred embodiment, the second part of the applicator comprises a sleeve, which sleeve is provided with lifting means arranged for axial force interaction with the implant.
    According to a further preferred embodiment, the lifting means comprises at least one resilient element projecting axially from the sleeve, provided with a radially inwardly directed hook at its Than sleeve spirit.
    This embodiment allows a form-fitting interaction with grip recesses at the external socket part of an implant according to the invention in a simple manner.
    The invention also relates to a system comprising a helical implant and a screw-in insertion instrument, the implant and the screw-in instrument being in accordance with the invented respective components, in particular in accordance with any of the preferred embodiments thereof, and wherein the implant means of the implant means are adapted for collaboration with each other.
    From the third aspect of the invention, the raised breathable needle is provided in that a method of the type stated in the preamble of the claim comprises the special procedures stated in the jugging part of the claim. The method thus comprises providing an implant system according to the present invention, in that screwing in takes place by means of this system and that torque is thereby transferred to the screwing instrument to both the external and the internal socket part of the implant.
    The invented screw-in instrument, the invented implant system, the invented method and the preferred embodiments thereof have advantages of a similar kind as are obtained with the invented implant, especially according to the preferred embodiments thereof, the advantages of which have been described above.
    The above-mentioned advantageous embodiments of the invention are set out in the dependent claims. It is to be understood that further preferred embodiments may be made of the possible combination of the above preferred embodiments and of the possible combination of these with features mentioned in the following description of exemplary embodiments.
    The invention is further explained by the following detailed description of examples thereof and with reference to the accompanying figures.
    Brief Description of the Figures Figs. 1 is a side view of an implant according to the invention.
    Fig. 2 is a partial enlargement of Fig. 1.
    Fig. 3 is a view of a portion of the implant of Fig. 2.
    Figs. 4 and 5 are views of the same kind as that of Fig. 2 and show alternative embodiments.
    Fig. 6 is a section through a screw-in instrument according to the invention.
    Fig. 7 is a view of the instrument of Fig. 6.
    Fig. 8 is a section through an alternative example of a screw-in instructor according to the invention. Fig. 9 is a view of the instrument of Fig. 8.
    Description of exemplary embodiment Fig. 1 shows a screw-shaped implant 1 according to the invention and is intended to be screwed into a pre-drilled hall in bone tissue. The implant has an anchoring end 2 which is inserted into the tail cla the implant is to be screwed in. The opposite end of the implant is called the application end 3 and is intended partly for applying torque when the implant is to be written into the tail and partly to support a prosthesis or mounting part for such. The implant 1 shown is intended for the jawbone and to support a denture. In such an application, the denture is attached to the application sand via a spacer element. The application end of the implant is designed so that the distance can abut against it in such a way that rotational welding is achieved.
    The application end is provided with socket means 4, 5 in order to be able to receive torque when the implant 1 is screwed in. The socket member 4, 5 consists partly of an internal socket part 4 in the form of an axial recess 4 which opens into the outer part of the application end 3 and of an external socket part 5 which has an outer shape such as a regular hexagon. The inner socket part 4 has a number, in this case six, axial grooves 6 which radially open into the recess 4 which has a circular cross-section. The implant is screwed into the tail by means of a screw-in instrument which has torque-transmitting surfaces corresponding to the internal 4 and external 5 socket part so that torque is transmitted via both socket parts 4, 5. The internal socket part 4 protrudes into the implant to an axial depth which is several times larger than the axial extent of the outer socket part 5.
    The outer socket part 5 further serves to provide said rotational welding for a spacer element, the latter having an inner profile corresponding to the hexagon of the outer socket part 5. In the example according to the figures, a notch 12 is further shown at each horn of the hexagon of the external socket part 5. The purpose and function of these are explained later.
    Each socket part can have any heist than a circle deviating shape in cross section. Fig. 4 shows an example where the external 15 as well as the internal 14 socket part is a hexagon. Fig. 5 shows an example where the external socket part 25 is a square and the internal 24 a triangle. The screw-in instructor then of course has corresponding profiles. Figs. 6 and 7 show a screw-in instrument 101 in a longitudinal section and a view, respectively, and are intended for screw-in of an implant 1 with the profile shape shown in Fig. 3 on the socket parts 4, 5. The screw-in instrument 101 has mounting means 104, 105 with profiles corresponding the screw-in part 4, 5. The screw-in instrument consists of a rod-shaped part 106 on which a sleeve 10 is attached. The rod-shaped part 106 has a profiled portion which forms a first part 104 of the attachment means and is intended to cooperate with the inner socket part 4 of the implant. The profiled portion consequently consists of six axially extending projections 109 projecting from a circle.
    The sleeve is provided at its lower end in Fig. 6 with an opening whose inside forms a second part 105 of the applicator. This second part 105 is intended to cooperate with the outer socket part 5 of the implant and is thus designed as an inner hexagon.
    Since the implant 1 is to be screwed into the tail in the bone tissue, the inscribing instrument 101 is pushed axially into the application part 3 of the implant so that the first part 104 goes down into the recess 4 of the implant. the hexagon to be pushed into the opening of the sleeve until it bottoms in it and abut against its mounting part 105, i.e. its inner hexagon. When the screw-in instrument 101 is then rotated, the torque will be transmitted to the implant partly through the projections 109 which act on the groove 6 and partly through the inner hexagon 105 which acts on the hexagon 5.
    When screwing implants with other shapes on the inner and outer socket means other than those according to Fig. 3, for example with shapes exemplified in Figs. 4 and 5, of course the screw-in instrument has these adapted shapes on the applicator. .
    Before an implant is to be screwed in, it must be moved some distance from its storage location, e.g. a package, to its position in the middle of the tail in the jawbone. Inserting the screw-in instrument into the implant Ors is therefore usually already at the implant's storage location, whereby the grip which then arises is used to simply move the implant to its screw-in position.
    Figs. 7 and 8 show an embodiment of the invented screw-in instrument 101 provided with a special device for securing such a gripping action. The screw-in instrument, which from all other constructive aspects corresponds to that in Figs. 5 and 6, is provided with lifting means 111, 9 112. The lifting means consists of a number, in this example two axially extending spring elements 111, each mounted in an axial groove 110 in the sleeve said that its outer ends can spring out in the radial direction. Each spring element 111 has a radially misaligned hook 112 at the far end.
    An implant arranged for co-operation with this embodiment of screw-in instruments 101 has notches 12, i.e. grip recesses at the underside of the external socket part 5 (see Figs. 2 and 3). These are coated at the respective horns of the hexagon and are about 0.25 mm deep.
    As the screw-in instrument 101 is pushed axially into the implant, the hooks 112 will be pressed outwards by the horn of the hexagon thanks to the resilient effort of the spring elements and slide axially along them until the implant bottoms in the screw-in instrument. Then the hooks have 112 night up to the notches 12 and snap into these, with some limited axial phase welding as a result.
    It should be understood that the special gripping device can be applied to other types of implants other than those according to the invention, e.g. implants that have only internal or only external socket members.
    权利要求:
    Claims (1)
    [1]
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    同族专利:
    公开号 | 公开日
    SE538044C2|2016-02-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2019-04-30| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1251073A|SE538044C2|2012-09-24|2012-09-24|Implants and instruments for screwing them|SE1251073A| SE538044C2|2012-09-24|2012-09-24|Implants and instruments for screwing them|
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