Anatomically guided instrumentation for trochlear groove replacement

Patent metadata

Field	Value
Publication number	US-2015374386-A1
Application number	US-201414769703-A
Country	US
Kind code	A1
Filing date	Feb 25, 2014
Priority date	Feb 25, 2013
Publication date	Dec 31, 2015
Grant date	—

Abstract

A method for replacing a joint surface, which includes resecting a first portion of the joint surface to create a wall surface and inner resected surface. The wall surface ( 2006 ) separates the inner resected surface and a non-resected portion of the joint surface. Further included in the method is cutting a concave groove having a first radius into the wall surface, and engaging the concave groove with a periphery of a joint prosthesis. The periphery includes a second radius that is substantially the same as the first radius of the concave groove.

First claim

1 . A method for replacing a joint surface, comprising:
resecting a first portion of the joint surface to create a wall surface and an inner resected surface, the wall surface separating the inner resected surface and a non-resected portion of the joint surface; cutting a concave groove having a first radius into the wall surface; and engaging the concave groove with a periphery of a joint prosthesis, the periphery having a second radius corresponding to the first radius of the concave groove.

2 . The method of claim 1 , wherein the wall surface and inner resected surface intersect at a junction, and the cutting step includes cutting the concave groove at least partially into the wall surface, inner resected surface, and junction.

3 . The method of claim 1 , wherein the wall surface and inner resected surface intersect at a junction, and the cutting step includes cutting the concave groove into the wall surface between the junction and non-resected portion of the joint surface such that the concave groove begins at a location adjacent to the junction and ends at a location adjacent to the intersection between the wall surface and the non-resected portion of the joint surface.

4 . The method of claim 1 , wherein the cutting step includes cutting the concave groove using a robotically controlled cutting tool.

5 . The method of claim 4 , wherein the robotically controlled cutting tool is a rotating burr.

6 . The method of claim 1 , wherein the first and second radius is 3 mm or less.

7 . The method of claim 1 , further comprising:
resecting a second portion of the joint surface to create a contacting surface.

8 . The method of claim 7 , further comprising:
engaging the contacting surface with a corresponding bone contacting surface of the joint prosthesis.

9 . The method of claim 8 , wherein the contacting surface and corresponding bone contacting surface are planar.

10 . The method of claim 9 , further comprising:
reaming an annular bone void with a reamer having a plurality of outer blades and inner blades extending outwardly from a distal end surface thereof.

11 . The method of claim 10 , wherein the plurality of outer blades are disposed about an outer circumference of the reamer, the inner blades are disposed about an inner circumference of the reamer and closer to a central axis of the reamer that the outer blades, the outer blades extending further outwardly from the distal end surface than the inner blades such that the outer blades penetrate deeper into bone than the inner blades.

12 . The method of claim 8 , wherein the engaging step includes placing at least a portion of a periphery of an articular surface of the joint prosthesis tangent to an articular surface of the non-resected portion of the joint surface adjacent the wall surface.

13 . The method of claim 1 , wherein resecting the first portion of the joint surface is performed so that a longitudinal axis of the wall surface and a longitudinal axis of the inner resected surface are substantially perpendicular to one another.

14 . The method of claim 1 , wherein resecting the first portion of the joint surface includes impacting a blade of a punch apparatus into the bone a predetermined depth.

15 . The method of claim 1 , wherein resecting the first portion of the joint surface includes reaming the joint surface with a reamer having a plurality of cutting blades.

16 . A method for replacing a joint surface, comprising:
contacting a first portion of the joint surface with at least three discrete bone contact regions that reside at differing locations about a periphery of a first template, the first template having a guide aperture extending therethrough and being located a predetermined position with respect to each of the at least three discrete contact regions; resecting a first portion of the joint surface through the guide aperture to create a wall surface and inner resected surface, the wall surface separating the inner resected surface and a non-resected portion of the joint surface; cutting a concave groove having a first radius into the wall surface; and engaging the concave groove with a periphery of a joint prosthesis, the periphery having a second radius corresponding to the first radius.

17 . The method of claim 16 , wherein resecting the first portion of the joint surface includes impacting a blade of a punch apparatus into the bone a predetermined depth.

18 . The method of claim 16 , wherein the wall surface and inner resected surface intersect at a junction, and the cutting step includes cutting the concave groove into the wall surface, inner resected surface, and junction.

19 . The method of claim 16 , wherein the wall surface and inner resected surface intersect at a junction, and the cutting step includes cutting the concave groove into the wall surface between the junction and non-resected portion of the joint surface such that the concave groove begins at a location adjacent to the junction and ends at a location adjacent to the intersection between the wall surface and the non-resected portion of the joint surface.

20 - 39 . (canceled)

40 . The method of claim 10 , further comprising:
inserting an annulus projecting from the joint prosthesis into the annular bone void

Assignees

• Stryker Corp

Inventors

• Collazo Carlos E
• Axelson Jr Stuart L
• Ferko Michael C
• Hampp Emily

Classifications

• A61B17/155

  Cutting femur · CPC title

• A61B17/1604 Primary

  Chisels; Rongeurs; Punches; Stamps · CPC title

• A61B17/1764

  for the knee · CPC title

• A61B17/1675 Primary

  for the knee · CPC title

• A61B34/30

  Surgical robots · CPC title