IMPLANT CONNECTION

Abstract

The invention relates to an implant component having at least one connection section. The connection section is coated at least partially with a TiNb coating and said coating has a thickness of 1-20 m, preferably 1-6 m. The invention also relates to a modular endoprosthesis comprising an implant component of this type.

Claims

1-9. (canceled)

10. Implant component having at least one connection portion, the connecting portion being coated at least partially with a TiNb coating, and the coating having a thickness of 1 to 20, preferably 1 to 6 m.

11. Implant component according to claim 10, in which the coating has a thickness of 3 to 6 m, preferably 3 to 5 m.

12. Implant component according to claim 10, in which the connecting portion is formed by a female and/or male cone.

13. Implant component according to claim 10, in which the connecting portion is rotationally symmetrical.

14. Implant component according to claim 12, in which the connecting portion is rotationally symmetrical.

15. Implant component according to claim 10, wherein the implant component has a metal alloy.

16. Implant component according to claim 12, wherein the implant component has a metal alloy.

17. Implant component according to claim 14, wherein the implant component has a metal alloy.

18. Implant component according to claim 10, wherein the implant component has a CoCr alloy.

19. Implant component according to claim 12, wherein the implant component has a CoCr alloy.

20. Implant component according to claim 13, wherein the implant component has a CoCr alloy.

21. Implant component according to claim 14, wherein the implant component has a CoCr alloy.

22. Implant component according to claim 10, wherein the implant component is a prosthesis shaft, a connecting piece or a joint head.

23. Implant component according to claim 14, wherein the implant component is a prosthesis shaft, a connecting piece or a joint head.

24. Implant component according to claim 17, wherein the implant component is a prosthesis shaft, a connecting piece or a joint head.

25. Implant component according to claim 21, wherein the implant component is a prosthesis shaft, a connecting piece or a joint head.

26. Modular endoprosthesis with at least one implant component according to claim 10.

27. Modular endoprosthesis with at least one implant component according to claim 14.

28. Modular endoprosthesis with at least one implant component according to claim 17.

29. Use of a TiNB coating to prevent corrosion on a connecting area of an implant component, wherein the coating has a thickness of 1 to 20, preferably 1 to 6 m.

Description

SUMMARY OF THE INVENTION AND PREFERRED EMBODIMENTS

[0012] In order to solve the above object, an implant component according to claim 1 as well as a modular endoprosthesis according to claim 8 are provided by the present invention.

[0013] The implant component according to the invention has at least one connecting portion which is at least partially coated with a TiNb coating.

[0014] Surprisingly, the connecting portion coated in accordance with the invention not only prevents secondary allergic reactions, but at the same time ensures a reliable frictional locking when the thickness is selected appropriately, and results in better protection against corrosion.

[0015] Similar to titanium, the titanium-niobium coating has a high degree of biocompatibility. However, the mechanical properties of this metal alloy are better suited for the presently provided coating. In particular, the coating has a desired low degree of hardness so that a deadlock between a hard coupling component and the coated male cone is ensured by cooperation of the original surface structure of the cone connection.

[0016] As already stated above, typically an attempt is made to achieve a reliable frictional locking by a correspondingly machined surface of the implant material in the connecting portion. In other words, due to the mechanical properties of the coating, normal force occurs when the connecting portion comes into contact with a complementary connecting portion of another implant component, which causes sufficient clamping action by the thus resulting frictional force between the surfaces of the connecting portions.

[0017] Usually nitride coatings are used to improve the abrasion properties of implant components. Therefore, they are used, for example, for the running surfaces of endoprostheses, where however other wear conditions prevail than in the connecting area. This may be one reason that nitride coatings did not produce satisfactory results.

[0018] The coating on the connecting portion preferably has a thickness of 1 to 20, preferably 1 to 6 m, since a stable, continuous and resilient connection of the implant component can be achieved in this range. Preferably, the coating is applied by PVD methods or implantation methods known to the skilled person.

[0019] In a particularly preferred embodiment, the coating has a layer thickness of 3 to 6 m and, more preferably, 3 to 5 m.

[0020] The aim is that the thickness of the layer is chosen to be high enough so as to achieve a coating which withstands mechanical loads. At the same time, the aim is not to choose the coating too thickly so that the structures of the cone surfaces are not obstructed/disturbed and thus do not preclude a stable frictional locking between the surfaces of the connecting area.

[0021] In a further preferred embodiment, the connecting portion is formed by a female cone and/or a male cone. The connecting portion is realized therewith in such a manner that it is connectable with a complementary cone of another, further implant component.

[0022] The other implant component can also be an implant component according to the invention having a coated connecting portion, however, it can also be any other implant component from the prior art. In both cases, the effect of preventing corrosion of the connecting portion is basically achieved independently of the other implant component.

[0023] In a particularly preferred embodiment of the implant component, the connecting portion is realized rotationally symmetrical.

[0024] This allows an alignment of the implant component about the rotational axis of the connecting portion and thus permits a better adaptation to the patient-specific anatomy and the biomechanical requirements.

[0025] However, it may also be the case that a relative movement of the implant component about its longitudinal axis is precisely not desired. In such a case, the connecting portion does not have a rotationally symmetrical connecting portion to prevent rotation of the implant component according to the invention relative to the component to which the implant component is to be connected.

[0026] In a preferred embodiment, a connecting portion according to the invention is used in an implant component which comprises a metal alloy.

[0027] This has advantages in particular with metal alloys, in which, as is known, severed or detached components lead to negative consequences for the affected patient.

[0028] Accordingly, in a particularly preferred embodiment, the implant component comprises a cobalt-chromium alloy.

[0029] The connecting portion according to the invention is preferably used in joint endoprostheses. This may be the prosthesis shaft, a connecting piece, a joint head and/or any component of such a joint endoprosthesis.

[0030] Furthermore, a modular endoprosthesis is provided by the present invention, having at least one implant component according to the invention with a coated connecting portion according to one of the aforementioned embodiments.

[0031] Such a modular endoprosthesis has the initially mentioned advantages of a modular structure, however avoids corrosion damage and the negative consequences thereof.

[0032] The invention also provides the use of a TiNb coating to prevent corrosion on a connecting portion of an implant component, the coating having a thickness of 1 to 20, preferably 1 to 6 m.

[0033] It is understood that the coating can be applied not just in the connecting area, but also to the implant surface going beyond the connecting area or to the entire implant surface. Such a coating has the advantage that it can be manufactured in an easier and thus less expansive manner since, for example, the costs of masking portions of the implant, which are not to be coated, are not required.