UNICOMPARTMENTAL CUSTOMIZED ARTHROPLASTY CUTTING JIGS AND METHODS OF MAKING THE SAME

• US 20100152741A1
• Filed: 12/14/2009
• Published: 06/17/2010
• Est. Priority Date: 12/16/2008
• Status: Active Grant

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: Otismed Corporation (Stryker Corporation)
• Inventors: Deveza, Lorenzo R., Koehle, Michael, Park, Ilwhan
• Granted Patent: US 8,617,175 B2
• Time in Patent Office: Days
• US Class Current: 606/89
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61F 2/3836 Special connection between upper and lower leg, e.g. constrained
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing

Abstract

Disclosed herein are unicompartmental femoral and tibial arthroplasty jigs for respectively assisting in the performance of unicompartmental femoral and tibial arthroplasty procedures on femoral and tibial arthroplasty target regions. The femoral and tibial unicompartmental arthroplasty jigs each include a first side, a second side and a mating surface. Each second side is generally opposite its respective first side. For the femoral jig, the mating surface is in the first side of the femoral jig and configured to matingly receive and contact a generally planar area of an anterior side of a femoral shaft generally proximal of the patellar facet boarder and generally distal an articularis genu. The first side of the femoral jig is configured to be oriented towards the femoral arthroplasty target region surface when the mating surface of the femoral jig matingly receives and contacts the planar area. For the tibial jig, the mating surface of the tibial jig is in the first side and configured to matingly receive and contact a generally planar area of an anterior side of a tibial shaft distal of the tibial plateau edge and generally proximal of the tibial tuberosity. The first side of the tibial jig is configured to be oriented towards the tibial arthroplasty target region surface when the mating surface of the tibial jig matingly receives and contacts the planar area.

Claims

1. An unicompartmental femoral arthroplasty jig for assisting in the performance of an unicompartmental femoral arthroplasty procedure on a femoral arthroplasty target region, the jig comprising:

a first side;

a second side generally opposite the first side; and

a mating surface in the first side and configured to matingly receive and contact certain surfaces of the femoral arthroplasty target region, the certain surfaces being limited to and including a medial articular condyle surface, an articular trochlear groove surface, and a generally planar area of an anterior side of a femoral shaft,

wherein the first side is configured to be oriented towards the femoral arthroplasty target region surface when the mating surface matingly receives and contacts the certain surfaces.

2. The unicompartmental femoral arthroplasty jig of claim 1, further comprising a cutting guide surface positioned and oriented relative to the mating surface to result in a cut in the femoral arthroplasty target region with a desired position and orientation.

3. The unicompartmental femoral arthroplasty jig of claim 2, wherein the desired position and orientation allows a prosthetic femoral implant to restore a patient'"'"'s knee joint to a natural alignment.

4. The unicompartmental femoral arthroplasty jig of claim 1, wherein the certain surfaces associated with the medial articular condyle surface are generally limited to an anterior and distal regions of the medial articular condyle surface.

5. The unicompartmental femoral arthroplasty jig of claim 1, wherein the certain surfaces associated with the articular trochlear groove surface are generally limited to an anterior and distal regions of a medial articular trochlear groove surface.

6. The unicompartmental femoral arthroplasty jig of claim 1, wherein the certain surfaces associated with the articular trochlear groove surface are generally limited to regions of a lateral articular trochlear groove surface and a medial articular trochlear groove surface.

7. The unicompartmental femoral arthroplasty jig of claim 1, wherein the certain surfaces associated with the articular trochlear groove surface are generally limited to anterior and distal regions of a lateral articular trochlear groove surface and anterior and distal regions of a medial articular trochlear groove surface.

8. The unicompartmental femoral arthroplasty jig of claim 1, wherein the certain surfaces associated with the generally planar area of the anterior side of the femoral shaft are generally limited to being generally distal of the articulars genu and generally proximal of the anterior patellar facet boarder.

9. The unicompartmental femoral arthroplasty jig of claim 1, wherein the certain surfaces associated with the generally planar area of the anterior side of the femoral shaft are generally limited to:

being generally distal of the articulars genu and generally proximal of the anterior patellar facet boarder; and

at least one contact point with the anterior patellar facet boarder.

10. An unicompartmental tibial arthroplasty jig for assisting in the performance of an unicompartmental tibial arthroplasty procedure on a tibial arthroplasty target region, the jig comprising:

a first side;

a second side generally opposite the first side; and

a mating surface in the first side and configured to matingly receive and contact certain surfaces of the tibial arthroplasty target region, the certain surfaces being limited to and including a medial articular plateau surface, an intercondyloid eminence surface, and a generally planar area of an anterior side of a tibial shaft,

wherein the first side is configured to be oriented towards the tibial arthroplasty target region surface when the mating surface matingly receives and contacts the certain surfaces.

11. The unicompartmental tibial arthroplasty jig of claim 10, further comprising a cutting guide surface positioned and oriented relative to the mating surface to result in a cut in the tibial arthroplasty target region with a desired position and orientation.

12. The unicompartmental tibial arthroplasty jig of claim 11, wherein the desired position and orientation allows an prosthetic tibial implant to restore a patient'"'"'s knee joint to a natural alignment.

13. The unicompartmental tibial arthroplasty jig of claim 10, wherein the certain surfaces associated with the generally planar area of the anterior side of the tibial shaft are generally limited to being generally distal of the tibial plateau edge and generally proximal of the tibial tuberosity.

14. The tibial arthroplasty jig of claim 10, wherein the certain surfaces associated with the intercondyloid eminence are generally limited to a medial upslope of the intercondyloid eminence.

15. The tibial arthroplasty jig of claim 10, wherein the certain surfaces associated with the intercondyloid eminence are generally limited to a medial upslope of the intercondyloid eminence and a region extending from anterior the intercondyloid eminence to towards a tuberosity over an edge transition from a tibial plateau region.

16. The unicompartmental tibial arthroplasty jig of claim 15, wherein at least one of the certain surfaces associated with the intercondyloid eminence merges with at least one of the certain surfaces associated with the generally planar area of the anterior side of the tibial shaft.

17. An unicompartmental tibial arthroplasty jig for assisting in the performance of an unicompartmental tibial arthroplasty procedure on a tibial arthroplasty target region, the jig comprising:

a first side;

a second side generally opposite the first side; and

a mating surface in the first side and configured to matingly receive and contact a generally planar area of an anterior side of a tibial shaft distal of the tibial plateau edge and generally proximal of the tibial tuberosity,

wherein the first side is configured to be oriented towards the tibial arthroplasty target region surface when the mating surface matingly receives and contacts the planar area.

18. The unicompartmental tibial arthroplasty jig of claim 17, wherein the generally planar area includes a portion that extends distally from generally the tibial plateau edge to a point generally even with the beginning of a distal half to distal third of the tibial tuberosity.

19. The unicompartmental tibial arthroplasty jig of claim 18, wherein the portion extends medial-lateral from a medial edge of a medial tibia condyle to a point generally even with a medial edge of the tibial tuberosity.

20. The unicompartmental tibial arthroplasty jig of claim 17, wherein the generally planar area includes a portion that extends distally from generally the tibial plateau edge to a point near a proximal boundary of the tibial tuberosity.

21. The unicompartmental tibial arthroplasty jig of claim 20, wherein the portion extends medial-lateral generally between a lateral edge and a medial edge of the tibial tuberosity.

22. An unicompartmental femoral arthroplasty jig for assisting in the performance of an unicompartmental femoral arthroplasty procedure on a femoral arthroplasty target region, the jig comprising:

a first side;

a second side generally opposite the first side; and

a mating surface in the first side and configured to matingly receive and contact a generally planar area of an anterior side of a femoral shaft generally proximal of the patellar facet boarder and generally distal an articularis genu,

wherein the first side is configured to be oriented towards the femoral arthroplasty target region surface when the mating surface matingly receives and contacts the planar area.