Revision implant augments, systems, and methods

Patent metadata

Field	Value
Publication number	US-9622871-B2
Application number	US-201414403829-A
Country	US
Kind code	B2
Filing date	Aug 22, 2014
Priority date	Aug 22, 2014
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A revision implant component comprising a body having a plurality of screw holes and a tapered head configured to engage a talar dome component of a multi-component ankle prosthesis. A surgical method is disclosed which includes creating an incision in a patient, exposing a multi-component ankle prosthesis implanted in a patient, disassembling at least one component of the multi-component ankle prosthesis, affixing a revision implant component to non-damaged bone using screws, and coupling the revision implant component to a talar dome of the multi-component ankle prosthesis.

First claim

What is claimed is:

1. A talar revision implant component for use with a multi-component ankle prosthesis, comprising:
a body including an inner side and an outer side, an upper surface and a lower surface, and a front side and a back side, wherein a length between the front side and the back side near the inner side of the body is greater than the length between the front side and the back side near the outer side of the body,
the body defining a plurality of screw holes,
the upper surface of the body having a tapered head configured to engage a talar dome component of the multi-component ankle prosthesis,
wherein the body is configured for affixation to a talus using a plurality of screws, and
wherein the back side of the body has first and second convex curves with a concave groove therebetween.

2. The talar revision implant component of claim 1 , wherein a plurality of polyaxial locking tabs are disposed about the circumference of the plurality of screw holes.

3. The talar revision implant component of claim 2 , wherein the body is tapered such that the width of a front side is greater than the width of a back side.

4. The talar revision implant component of claim 3 , wherein the tapered head is shaped and dimensioned as a Morse taper.

5. The talar revision implant component of claim 4 , wherein the tapered head defines a recess and a notch.

6. The talar revision implant component of claim 5 , wherein the body further defines at least one wire hole.

7. The talar revision implant component of claim 1 , wherein the body is shaped and dimensioned to substantially align with a top surface of a resected talus.

8. The talar revision implant component of claim 1 , wherein the body is shaped and dimensioned to substantially align with a bottom surface of a talar dome.

9. A surgical method of using the talar revision implant component of claim 1 , comprising:
creating an incision in a patient;
exposing the multi-component ankle prosthesis implanted in the patient;
disassembling at least one component of the multi-component ankle prosthesis;
affixing the talar revision implant component to non-damaged bone using screws; and
coupling the revision implant component to a talar dome of the multi-component ankle prosthesis,
wherein the tapered head is configured to engage a feature of a component of the multi-component ankle prosthesis.

10. The surgical method of claim 9 , further comprising resecting damaged bone prior to the step of affixing the talar revision implant component to non-damaged bone using screws.

11. The surgical method of claim 10 , wherein the revision implant component is affixed to non-damaged bone using screws with threaded heads.

12. The surgical method of claim 11 , wherein the screws are affixed to the talar revision implant component and non-damaged bone of the talus, or to the talus and at least one of the group consisting of the calcaneus or the navicular.

13. The surgical method of claim 9 , wherein the talar revision implant component is coupled to the component of the multi-component ankle prosthesis in situ.

14. The surgical method of claim 13 , wherein the tapered head is a Morse taper.

15. A surgical method of using the talar revision implant component of claim 1 , comprising:
creating an incision in a patient;
exposing the multi-component ankle prosthesis implanted in the patient;
disassembling at least one component of the multi-component ankle prosthesis;
resecting damaged bone adjacent to the at least one disassembled component of the multi-component ankle prosthesis;
selecting the talar revision implant component from a kit containing a plurality of talar revision implant components based on the desired thickness of the selected talar revision implant component as a function of the depth of bone resected;
affixing the talar revision implant component to non-damaged bone using screws; and
coupling the talar revision implant component to a talar dome of the multi-component ankle prosthesis,
wherein the tapered head is configured to operatively connect with the talar dome.

16. The surgical method of claim 15 , wherein the screws are affixed to the revision implant component and non-damaged one of the talus, or to the talus and at least one of the group consisting of the calcaneus or the navicular.

17. The talar revision implant component of claim 1 , wherein the body is asymmetrical.

18. The revision implant component of claim 17 , wherein:
the body is shaped and dimensioned to substantially align with a top surface of a resected talus, and to substantially align with a bottom surface of a talar dome,
the tapered head is shaped and dimensioned as a Morse taper,
the body is tapered such that the width of the front side is greater than the width of the back side,
the body further defines a plurality of wire holes oriented at an oblique angle relative to a plane of the lower surface of the body.

Assignees

• Wright Medical Tech Inc

Inventors

• Sander Elizabeth J

Classifications

• A61F2002/30408

  Conical threadings · CPC title

• A61F2002/4619

  for extraction · CPC title

• A61F2002/30736

  Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect · CPC title

• A61F2002/4207

  Talar components · CPC title

• A61F2002/30774

  internally-threaded · CPC title