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1. WO2020185908 - SYSTÈME ORTHOPÉDIQUE AVEC COMPOSANT FÉMORAL PIVOTANT MÉDIAL ET INSERT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:

1. An orthopaedic system comprising:

a tibial insert having a medial articular surface and a lateral articular surface, wherein the medial and lateral articular surfaces are asymmetrically shaped relative to each other; and

a femoral component having a medial condyle configured to articulate on the medial articular surface of the tibial insert and a lateral condyle configured to articulate on the lateral articular surface of the tibial insert, wherein the medial condyle of the femoral component includes a femoral articular surface having a first radius of curvature that extends posteriorly to a first degree of flexion of 70 degrees or less and a plurality of decreasing radii of curvature that extend posteriorly from the first degree of flexion to a second degree of flexion greater than the first degree of flexion.

2. The orthopaedic system of claim 1, wherein the femoral articular surface of the femoral component has a second radius of curvature at the second degree of flexion, the second radius of curvature being greater than each of the decreasing radii of curvature.

3. The orthopaedic system of claim 1, wherein the femoral articular surface of the femoral component has a second radius of curvature, posterior of the decreasing radii of curvature, that is greater than the posterior-most radius of the plurality of decreasing radii of curvature.

4. The orthopaedic system of claim 1, wherein the medial articular surface of the tibial insert and the femoral articular surface of the medial condyle of the femoral component are more conforming than the lateral articular surface of the tibial insert and femoral articular surface of the lateral condyle of the femoral component.

5. The orthopaedic system of claim 4, wherein the medial articular surface of the tibial insert and the femoral articular surface of the medial condyle have an anterior-posterior conformity of at least 96% at zero degrees of flexion.

6. The orthopaedic system of claim 4, wherein the medial articular surface of the tibial insert and the femoral articular surface of the medial condyle have a medial-lateral conformity of at least 93%.

7. The orthopaedic system of claim 6, wherein the lateral articular surface of the tibial insert and the femoral articular surface of the lateral condyle have a medial-lateral conformity of at least 93%.

8. The orthopaedic system of claim 1, wherein the tibial insert includes an anterior medial lip having a first height and an anterior lateral lip having a second height, and wherein the first height of the anterior medial lip is greater than the second height of the anterior lateral lip.

9. The orthopaedic system of claim 8, wherein the medial articular surface of the tibial insert includes a dwell point, and the first height of the anterior medial lip, relative to the dwell point, is at least 9 millimeters.

10. The orthopaedic system of claim 8, wherein the medial articular surface of the tibial insert includes a dwell point having an arcuate or oblong shape when viewed in a transverse plane.

1 1. The orthopaedic system of claim 1 , wherein the medial articular surface of the tibial insert includes a dwell point and an anterior medial lip, wherein the anterior medial lip has a height, relative to the dwell point, of at least 9 millimeters.

12. The orthopaedic system of claim 1, wherein the medial articular surface of the tibial insert includes a dwell point having an arcuate or oblong shape when viewed in a transverse plane.

13. The orthopaedic system of claim 1, wherein the first radius of curvature has a length that is between 41% to 47% of an anterior-posterior length of the tibial insert.

14. The orthopaedic system of claim 1, wherein the medial articular surface of the tibial insert includes a dwell point and the lateral

articular surface provides an arcuate path for pivoting of the femoral component about the dwell point.

15. The orthopaedic system of claim 1, wherein the first radius of curvature extends anteriorly to a hyper-extension degree of flexion of 30 degrees or less.

16. A tibial insert of a knee replacement system, the tibial insert comprising:

a lateral articular surface configured to articulate with a lateral condyle of a femoral component; and

a medial articular surface configured to articulate with a medial condyle of the femoral component, wherein the medial articular surface is asymmetrically shaped relative to the lateral articular surface and includes a dwell point and an anterior medial lip having a height, relative to the dwell point, of at least nine millimeters.

17. The tibial insert of claim 16, wherein the medial articular surface and the medial condyle of the femoral component are more conforming than the lateral articular surface and the lateral condyle of the femoral component.

18. The tibial insert of claim 16, wherein the dwell point has an arcuate or oblong shape when viewed in a transverse plane.

19. The tibial insert of claim 16, wherein the lateral articular surface includes an anterior lateral lip having a height less than the height of the anterior medial lip.

20. An orthopaedic system comprising:

a tibial insert comprising a lateral articular surface and a medial articular surface, and

a femoral component comprising a medial condyle configured to articulate on the medial articular surface of the tibial insert, and a lateral condyle configured to articulate on the lateral articular surface of the tibial insert, the medial condyle of the femoral component including a femoral articular surface having a first radius of curvature that extends posteriorly to a first degree of flexion of 70 degrees or less and a plurality of decreasing radii of curvature that extend posteriorly from the first degree of flexion to a second degree of flexion greater than the first degree of flexion,

wherein the medial articular surface of the tibial insert is asymmetrically- shaped relative to the lateral articular surface and includes a dwell point having an arcuate or oblong shape when viewed in a transverse plane and an anterior medial lip having a height, relative to the dwell point, of at least nine millimeters.

21. The orthopaedic system of claim 20, wherein the tibial insert includes an anterior lateral lip, and wherein the height of the anterior medial lip is greater than a height of the anterior lateral lip.

22. The orthopaedic system of claim 20, wherein the femoral articular surface of the femoral component has a second radius of curvature at the second degree of flexion, wherein the second radius of curvature is greater than the posterior-most radius of the plurality of decreasing radii of curvature.

23. The orthopaedic system of claim 22, wherein the second radius of curvature is posterior of the decreasing radii of curvature.

24. The orthopaedic system of claim 20, wherein the medial articular surface of the tibial insert and the femoral articular surface of the medial condyle of the femoral component are more conforming than the lateral articular surface of the tibial insert and femoral articular surface of the lateral condyle of the femoral component.

25. The orthopaedic system of claim 24, wherein the medial articular surface of the tibial insert and the femoral articular surface of the medial condyle have a medial-lateral conformity of at least 93%.

26. The orthopaedic system of claim 20, wherein the lateral articular surface provides an arcuate path for pivoting of the femoral component about the dwell point.

27. The orthopaedic system of claim 20, wherein the first radius of curvature extends anteriorly to a hyper-extension degree of flexion of 30 degrees or less.

28. An orthopaedic system comprising:

a tibial insert comprising an articular surface, and

a femoral component comprising a condyle configured to articulate on the articular surface of the tibial insert, the condyle including a femoral articular surface having a first radius of curvature that extends posteriorly to a first degree of flexion of 70 degrees or less and a plurality of decreasing radii of curvature that extend posteriorly from the first degree of flexion to a second degree of flexion greater than the first degree of flexion, wherein the articular surface of the tibial insert includes a dwell point having an arcuate or oblong shape when viewed in a transverse plane and an anterior lip having a height, relative to the dwell point, of at least nine millimeters.

29. The orthopaedic system of claim 29, wherein the femoral articular surface of the femoral component has a second radius of curvature at the second degree of flexion, wherein the second radius of curvature is

greater than the posterior-most radius of the plurality of decreasing radii of curvature.

30. The orthopaedic system of claim 30, wherein the second radius of curvature is posterior of the decreasing radii of curvature.

31. The orthopaedic system of claim 30, wherein the articular surface of the tibial insert and the femoral articular surface of the condyle have a medial-lateral conformity of at least 93%.