Stepped tibial baseplate

Patent metadata

Field	Value
Publication number	US-2016278930-A1
Application number	US-201615178884-A
Country	US
Kind code	A1
Filing date	Jun 10, 2016
Priority date	May 30, 2014
Publication date	Sep 29, 2016
Grant date	—

Abstract

Disclosed herein are orthopaedic implants having a medial portion and a lateral portion, each of the medial and lateral portions having a proximal surface and a distal surface opposite the proximal surface. An intermediate portion joins the medial and lateral portions, wherein the intermediate portion has a proximal surface angled to the proximal surfaces of the medial and lateral portions about a longitudinal axis of the orthopaedic implant. The proximal surface of the medial portion is stepped from the proximal surface of the lateral portion about the longitudinal axis. The proximal surfaces of the medial and lateral portions are configured to receive corresponding medial and lateral inserts.

First claim

1 . An orthopaedic implant comprising:
medial, intermediate and lateral portions each having an articular surface and a bone contacting surface, the intermediate portion joining the medial and lateral portions, wherein the articular surface of one of the lateral and medial portions is located superiorly to the articular surface of the other of the lateral and medial portions about a longitudinal axis of the orthopaedic implant, and wherein the articular surface of the intermediate portion is sloped with respect to the respective articular surfaces of the medial and lateral portions.

2 . The orthopaedic implant of claim 1 , wherein the bone contacting surface of the medial and lateral portions each lie along a respective plane, the respective planes being parallel and offset to one another about the longitudinal axis of the orthopaedic implant.

3 . The orthopaedic implant of claim 1 , wherein the articular and bone contacting surfaces of the intermediate portion are parallel to one another.

4 . The orthopaedic implant of claim 1 , wherein the bone contacting surface of the intermediate portion is sloped with respect to the respective bone contacting surface of the medial and lateral portions.

5 . The orthopaedic implant of claim 4 , wherein the articular and bone contacting surfaces of the intermediate portion are sloped at different angles with respect to the respective articular surfaces of the medial and lateral portions.

6 . The orthopaedic implant of claim 1 , wherein the bone contacting surface of one of the lateral and medial portions is located superiorly to the bone contacting surface of the other of the lateral and medial portions about a longitudinal axis of the orthopaedic implant.

7 . The orthopaedic implant of claim 1 , wherein the bone contacting surfaces of the medial and lateral portions are coplanar.

8 . The orthopaedic implant of claim 1 , wherein the bone contacting surfaces of the medial, lateral and intermediate portions are coplanar.

9 . The orthopaedic implant of claim 1 , further comprising at least one engagement feature extending distally from at least one of the medial, proximal, or intermediate portions.

10 . The orthopaedic implant of claim 1 , further comprising a first transition region between the medial portion and the intermediate portion and a second transition region between the intermediate portion and the lateral portion, wherein the first transition region forms a first radius and the second transition region forms a second radius.

11 . An orthopaedic implant comprising:
medial, intermediate and lateral portions each having an articular surface and a bone contacting surface, the intermediate portion joining the medial and lateral portions, wherein the bone contacting surface of one of the lateral and medial portions is located superiorly to the articular surface of the other of the lateral and medial portions about a longitudinal axis of the orthopaedic implant, and wherein the bone contacting surface of the intermediate portion is sloped with respect to the respective bone contacting surfaces of the medial and lateral portions.

12 . The orthopaedic implant of claim 11 , wherein the articular surface of the medial and lateral portions each lie along a respective plane, the respective planes being parallel and offset to one another about the longitudinal axis of the orthopaedic implant.

13 . The orthopaedic implant of claim 11 , wherein the articular and bone contacting surfaces of the intermediate portion are parallel to one another.

14 . The orthopaedic implant of claim 11 , wherein the articular surface of the intermediate portion is sloped with respect to the respective articular surfaces of the medial and lateral portions.

15 . The orthopaedic implant of claim 11 , wherein the articular surface of one of the lateral and medial portions is located superiorly to the articular surface of the other of the lateral and medial portions about a longitudinal axis of the orthopaedic implant.

16 . The orthopaedic implant of claim 11 , wherein the articular surfaces of the medial and lateral portions are coplanar.

17 . The orthopaedic implant of claim 11 , wherein the articular surfaces of the medial, lateral and intermediate portions are coplanar.

18 . The orthopaedic implant of claim 11 , further comprising at least one engagement feature extending distally from at least one of the medial, proximal, or intermediate portions.

19 . The orthopaedic implant of claim 11 , further comprising a first transition region between the medial portion and the intermediate portion and a second transition region between the intermediate portion and the lateral portion, wherein the first transition region forms a first radius and the second transition region forms a second radius.

20 . A orthopaedic implant comprising:
medial, intermediate and lateral portions each having an articular surface and a bone contacting surface, the intermediate portion joining the medial and lateral portions, wherein the articular surface of one of the lateral and medial portions is located superiorly to the articular surface of the other of the lateral and medial portions about a longitudinal axis of the orthopaedic implant, and wherein the articular and bone contacting surfaces of the intermediate portion are sloped with respect to the respective articular and bone contacting surfaces of the medial and lateral portions.

Assignees

• Stryker Corp

Inventors

• Davignon Robert
• Ferko Michael C
• Axelson Jr Stuart L

Classifications

• A61F2002/3895

  unicompartimental · CPC title

• A61F2/389 Primary

  Tibial components (A61F2/3868 takes precedence) · CPC title

• Y10T29/49002

  Electrical device making · CPC title