Integrated prosthetic assembly

• US 20050187635A1
• Filed: 03/28/2005
• Published: 08/25/2005
• Est. Priority Date: 08/30/2002
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Metzger, Robert G.
• Granted Patent: US 7,255,715 B2
• Time in Patent Office: Days
• US Class Current: 623/20.150
• CPC Class Codes: A61F 2/08 Muscles; Tendons; Ligaments sutures A61B17/04
• CPC Class Codes: A61F 2/3836 Special connection between upper and lower leg, e.g. constrained

Abstract

An integrated prosthetic assembly for implanting a prosthetic joint between two bones and including at least one ligament graft. The assembly includes a plurality of joint components, a plurality of base components, and at least one drill guide keyed to one of the base components at a predetermined angle for forming a predetermined tunnel in one of the bones.

Claims

1. An integrated prosthetic assembly for implanting a prosthetic knee joint between a femur and a tibia to include at least one graft that extends through a femoral tunnel, or a tibial tunnel, or both, the assembly comprising:

a plurality of femoral components each including a femoral clearance;

a plurality of tibial components each including a tibial clearance; and

at least one drill guide adapted to guide an instrument during the implantation procedure to precisely place a tunnel in the femur or the tibia to be aligned with either of the femoral clearance or the tibial clearance;

wherein each of the plurality of femoral components, plurality of tibial components, or both provide a different final geometry to the knee joint prosthetic when implanted.

2. The assembly of claim 1, wherein each of the plurality of the femoral components includes a first of the femoral clearances adapted to allow the anterior cruciate ligament to clear the femoral component and a second of the femoral clearances adapted to allow the posterior cruciate ligament to clear the femoral component.

3. The assembly of claim 2, wherein each of the first femoral clearances operably interact with the anterior cruciate ligament to produce rollback at a predetermined flexion of the knee joint.

4. The assembly of claim 2, wherein each of the second femoral clearances operably interact with the posterior cruciate ligament to prohibit subluction of the knee joint.

5. The assembly of claim 1, wherein each of the plurality of the tibial components includes a first of the tibial clearances adapted to allow the anterior cruciate ligament to clear the femoral component and a second of the tibial clearances adapted to allow the posterior cruciate ligament to clear the tibial component.

6. The assembly of claim 2, further comprising:

a plurality of tibial trial components;

wherein the drill guide operably engages one of the tibial trial components to assist in forming the tibial tunnel.

7. The assembly of claim 2, further comprising:

a plurality of femoral trial components;

wherein the drill guide operably engages one of the femoral trial components to assist in forming the femoral tunnel.

8. The assembly of claim 2, further comprising a plurality of bearing members each including a bearing clearance, wherein each of the bearing components operably interact with one of the plurality of the femoral components or the tibial components to provide the prosthetic.

9. The assembly of claim 2, wherein the knee prosthesis includes one of the femoral components and one of the tibial components selected to produce a desired rollback, constraint, or both in the prosthetic knee joint.

10. The assembly of claim 2, wherein the tunnels formed by the drill guide are adapted to produce predetermined kinematics in the prosthetic knee joint.

11. The assembly of claim 6, wherein the drill guide is keyed to one of the tibial trial components.

12. The assembly of claim 11, wherein the drill guide includes a drill guide bore at a predetermined angle relative to the one tibial trial component.

13. The assembly of claim 2, further comprising:

a plurality of tibial trial components; and

a plurality of drill guides, each drill guide keyed at a predetermined angle relative to a corresponding tibial trial component.

14. The assembly of claim 7, wherein the drill guide is keyed to one of the femoral trial components.

15. The assembly of claim 14, wherein the drill guide includes a drill guide bore at a predetermined angle relative to the one femoral trial component.

16. The assembly of claim 1, wherein the drill guide is keyed to a resected portion of the femur.

17. The assembly of claim 16, wherein the drill guide is modular.

18. The assembly of claim 16, wherein the drill guide comprises at least one drill guide bore at a predermined angle relative the resected portion of the femur.

19. The assembly of claim 2, further comprising:

a plurality of femoral trial components; and

a plurality of drill guides, each drill guide keyed at a predetermined angle relative to a corresponding femoral trial component.

20. The assembly of claim 1, wherein the graft is natural or artificial.

21. An integrated prosthetic assembly for implanting a prosthetic joint between two bones and including at least one ligament graft, the assembly comprising:

a plurality of joint components;

a plurality of base components; and

at least one drill guide keyed to one of the base components at a predetermined angle for forming a predetermined tunnel in one of the bones.

22. The integrated prosthetic assembly of claim 21, wherein the joint is a knee joint and the joint and base components comprise femoral and tibial joint components and femoral and tibial base components respectively.

23. The integrated prosthetic assembly of claim 21, further comprising at least one coupling device for engaging the drill guide to the base component.

24. The integrated prosthetic assembly of claim 23, wherein the coupling device comprises a post extending from one of the drill guide and the base component and received in a bore of the other of the drill guide and the base component.

25. The integrated prosthetic assembly of claim 21, wherein the drill guide defines a guide bore at the predetermined angle corresponding to a guide bore in the corresponding base component.

26. The integrated prosthetic assembly of claim 21, further comprising a drill guide keyed to a resected bone portion at a predetermined angle for forming a predetermined tunnel in the corresponding bone.

27. The integrated prosthetic assembly of claim 21, wherein the base component is a trial component.

28. The integrated prosthetic assembly of claim 27, wherein the trial component is either a femoral or a tibial trial component.

29. A method of preparing a graft tunnel for a joint prosthesis in a joint, the method comprising:

resecting an articulating bone portion of the joint;

attaching a base component to the resected bone portion;

coupling a drill guide to the base component, the drill guide keyed at a predetermined angle relative to the base component;

guiding a tunnel-forming tool through the drill guide and the base component; and

forming the graft tunnel in the resected bone portion.

30. The method of claim 29, wherein the joint is knee joint and the graft tunnel is one or both of a tibial graft tunnel and a femoral graft tunnel.

31. The method of claim 29, wherein coupling the drill guide to the base component comprises coupling with a post and bore connection therebetween.

32. The method of claim 29, wherein guiding a tunnel-forming tool through the drill guide and the base component comprises guiding the tool through corresponding guide bores of the drill guide and of the base component at the predetermined angle.

33. The method of claim 29, further comprising coupling a second drill guide to a resected bone portion, the second drill guide keyed at a predetermined angle relative to the resected bone portion.

34. The method of claim 33, further comprising:

guiding the tunnel-forming tool through the second drill guide; and

forming a fixation tunnel in the resected bone portion.