System and method for repairing articular surfaces

• US 10,624,748 B2
• Filed: 12/22/2016
• Issued: 04/21/2020
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Original Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Inventors: Ek, Steven W., Miniaci, Anthony, Brightman, Timothy
• Primary Examiner(s): Stewart, Jason-Dennis N
• Application Number:
  US15/388,808
• Publication Number:
  US 20170100251A1
• Time in Patent Office: 1,216 Days
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 2017/0409 Instruments for applying suture anchors
• CPC Class Codes: A61B 2017/044 with a threaded shaft, e.g. screws
• CPC Class Codes: A61F 2/30 Joints
• CPC Class Codes: A61F 2/30756 Cartilage endoprostheses A61F2/3603 takes precedence
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/40 for shoulders
• CPC Class Codes: A61F 2/4003 Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft replacing only the epiphyseal or metaphyseal parts of the femur A61F2/3601
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2/42 for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
• CPC Class Codes: A61F 2/4606 of wrists or ankles; of hands, e.g. fingers; of feet, e.g. toes
• CPC Class Codes: A61F 2/4618 of cartilage
• CPC Class Codes: A61F 2/4637 for connecting or disconnecting two parts of a prosthesis
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30607 Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
• CPC Class Codes: A61F 2002/30614 Sets comprising both primary and revision endoprostheses
• CPC Class Codes: A61F 2002/3085 : with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/30901 : longitudinally
• CPC Class Codes: A61F 2002/4022 : having a concave shape, e.g. hemispherical cups
• CPC Class Codes: A61F 2002/4085 : having a convex shape, e.g. hemispherical heads
• CPC Class Codes: A61F 2002/4627 : with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4628 : with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2310/00011 : Metals or alloys
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00047 : Aluminium or Al-based alloys

Abstract

A joint replacement system for repairing an articular surface of a first bone of a joint includes an anchor portion and an implant portion. The anchor portion includes an anchor to be secured to the bone, and an anchor fixation head including a bone-facing surface (BFS) extending radially outward from the anchor and an implant facing surface (IFS) extending from a periphery of the BFS. The implant portion is formed from a material (e.g., CoCr) more dense than the material of the anchor portion (e.g., Ti) and includes a fixation cavity to receive at least a portion of the anchor fixation head (AFH), the fixation cavity includes an anchor facing surface (AFS) configured to form a frictional connection with the IFS, and a load bearing surface having a contour for articulating against a cooperating articulating surface of a second bone of the joint.

Claims

1. A joint replacement system for repairing at least a first articular surface of a first bone of a joint, said system comprising:

a first implant system comprising;

an anchor portion formed from at least a first material, said anchor portion comprising;

a first anchor configured to be secured to said bone; and

an anchor fixation head including a bone-facing surface and an implant facing surface, wherein said bone-facing surface extends radially outward from said anchor, and wherein said implant facing surface extends from a periphery of said bone facing surface and includes a first mating surface; and

an implant portion formed from at least a second material more dense than said first material, said implant portion comprising;

a fixation cavity configured to receive at least a portion of said anchor fixation head, said fixation cavity including an anchor facing surface extending from an opening thereof, said anchor facing surface including a second mating surface configured to form a frictional connection with said first mating surface; and

a first load bearing surface having a contour for articulating against a cooperating, second articulating surface associated with a second bone of said joint;

wherein;

said fixation cavity defines a volume Vr that is greater than or equal to 50% of a total volume Vi of said implant portion; and

/or

said anchor fixation head defines a volume Vh that is greater than or equal to 50% of said total volume Vi of said implant portion.

2. The joint replacement system of claim 1, further comprising:

a second implant system comprising;

a second implant having a second load bearing surface configured to articulate against said first load bearing surface; and

a second anchor configured to be secured into said second bone, wherein said second anchor is configured to be secured to said second implant.

3. The joint replacement system of claim 2, wherein said second implant and said second anchor include a first and a second fixation element, respectively.

4. The joint replacement system of claim 3, wherein said first and said second fixation elements are configured to form tapered connection therebetween.

5. The joint replacement system of claim 4, wherein said first and said second fixation elements comprise a tapered cavity and a tapered protrusion configured to form tapered connection therebetween.

6. The joint replacement system of claim 3, wherein said first and said second fixation elements are configured to form a snap-fit connection therebetween.

7. The joint replacement system of claim 1, wherein said first load bearing surface is configured to replace substantially the entire first articular surface of said first bone.

8. The joint replacement system of claim 7, wherein said second load bearing surface is configured to replace substantially an entire second articular surface of said second bone.

9. The joint replacement system of claim 1, wherein said first load bearing surface is configured to replace a portion of said first articular surface.

10. The joint replacement system of claim 1, wherein said first load bearing surface has a contour based on a plurality of overlapping excision sites.

11. The joint replacement system of claim 1, wherein said first load bearing surface has a contour defining a socket.

12. The joint replacement system of claim 11, and wherein said second load bearing surface has a contour defining a generally hemispherical ball configured to articulate, at least in part, in said socket.

13. The joint replacement system of claim 1, and wherein said first load bearing surface has a contour defining a generally hemispherical ball.

14. The joint replacement system of claim 1, wherein said first material comprises steel, titanium, or an alloy thereof.

15. The joint replacement system of claim 1, wherein said second material comprises cobalt-chromium (CoCr).

16. The joint replacement system of claim 1, wherein said volume Vr is greater than or equal to 50% of said total volume Vi of said implant portion.

17. The joint replacement system of claim 1, wherein said volume Vh is greater than or equal to 50% of said total volume Vi of said implant portion.

18. The joint replacement system of claim 1, wherein said opening of said fixation cavity has a cross-section that is greater than a cross-section of said anchor.

19. The joint replacement system of claim 18, wherein said opening includes a maximum radial distance Do from a longitudinal axis of said anchor portion that is larger than a maximum radial distance Da of said anchor.

20. The joint replacement system of claim 1, wherein a maximum thickness Ti of said implant portion is less than a maximum thickness Th of said anchor fixation head.

21. The joint replacement system of claim 1, wherein said anchor fixation head has a cross-section that is greater than a cross-section of said anchor.

22. The joint replacement system of claim 21, wherein said implant portion includes at least one bone-facing surface extending radially outward from at least a portion of said opening of said fixation cavity.

23. The joint replacement system of claim 21, wherein said anchor facing surface has a generally hemispherical shape.

24. The joint replacement system of claim 1, wherein said anchor fixation head and said anchor are a unitary structure.

25. The joint replacement system of claim 1, wherein said implant facing surface of said fixation cavity has a shape that generally corresponds to the shape of implant facing surface of said anchor fixation head.

26. The joint replacement system of claim 1, wherein said first and said second mating surfaces have a tapered shape.

27. The joint replacement system of claim 1, wherein said anchor fixation head comprises at least one fixation member opening extending therethrough, said fixation member opening configured to receive a fixation member.

28. The joint replacement system of claim 27, further comprising said fixation member, and wherein said fixation member comprises a screw.

29. The joint replacement system of claim 1, wherein said first material comprises steel, titanium, or an alloy thereof, and wherein said second material comprises cobalt-chromium (CoCr).

30. A joint replacement system for repairing at least a first articular surface of a first bone of a joint, said system comprising:

a first implant system comprising;

an anchor portion formed from at least a first material, said anchor portion comprising;

a first anchor configured to be secured to said bone; and

an anchor fixation head including a bone-facing surface and an implant facing surface, wherein said bone-facing surface extends radially outward from said anchor, and wherein said implant facing surface extends from a periphery of said bone facing surface and includes a first mating surface; and

an implant portion formed from at least a second material more dense than said first material, said implant portion comprising;

a fixation cavity configured to receive at least a portion of said anchor fixation head, said fixation cavity including an anchor facing surface extending from an opening thereof, said anchor facing surface including a second mating surface configured to form a frictional connection with said first mating surface and said opening having a cross-section that is greater than a cross-section of said anchor fixation head; and

a first load bearing surface having a contour for articulating against a cooperating, second articulating surface associated with a second bone of said joint.

31. The joint replacement system of claim 30, wherein said implant portion includes at least one bone-facing surface extending radially outward from at least a portion of said opening of said fixation cavity.

32. The joint replacement system of claim 30, wherein said anchor facing surface has a generally hemispherical shape.

33. The joint replacement system of claim 30, further comprising:

a second implant system comprising;

a second implant having a second load bearing surface configured to articulate against said first load bearing surface; and

a second anchor configured to be secured into said second bone, wherein said second anchor is configured to be secured to said second implant.

34. The joint replacement system of claim 33, wherein said second anchor includes a threaded region configured to secure said second anchor to said second bone.

35. The joint replacement system of claim 33, wherein said second implant system includes a single anchor, wherein said second anchor is centrally located with respect to the second implant.

36. The joint replacement system of claim 33, wherein said second implant system includes a single anchor, wherein a longitudinal axis of said second anchor is collinear with a longitudinal axis of said assembled second implant system.

37. The joint replacement system of claim 33, wherein said first implant system includes a single anchor, wherein said first anchor is centrally located with respect to the first implant portion.

38. The joint replacement system of claim 33, wherein said first implant system includes a single anchor, wherein a longitudinal axis of said first anchor is collinear with a longitudinal axis of assembled first implant system.

39. The joint replacement system of claim 30, wherein said opening includes a maximum radial distance Do from a longitudinal axis of said anchor portion that is larger than a maximum radial distance Da of said anchor.

40. A joint replacement system for repairing at least a first articular surface of a first bone of a joint, said system comprising:

a first implant system comprising;

an anchor portion formed from at least a first material, said anchor portion comprising;

a first anchor configured to be secured to said bone; and

an anchor fixation head including a bone-facing surface and an implant facing surface, wherein said bone-facing surface extends radially outward from said anchor, and wherein said implant facing surface extends from a periphery of said bone facing surface and includes a first mating surface; and

an implant portion formed from at least a second material more dense than said first material, said implant portion comprising;

a fixation cavity configured to receive at least a portion of said anchor fixation head, said fixation cavity including an anchor facing surface extending from an opening thereof, said anchor facing surface including a second mating surface configured to form a frictional connection with said first mating surface; and

a first load bearing surface having a contour for articulating against a cooperating, second articulating surface associated with a second bone of said joint;

wherein a maximum thickness Ti of said implant portion is less than a maximum thickness Th of said anchor fixation head.

41. A joint replacement system for repairing at least a first articular surface of a first bone of a joint, said system comprising:

a first implant system comprising;

an anchor portion formed from at least a first material, said anchor portion comprising;

an anchor configured to be secured to said bone; and

an anchor fixation head including a bone-facing surface and an implant facing surface, wherein said bone-facing surface extends radially outward from said anchor, and wherein said implant facing surface extends from a periphery of said bone facing surface and includes a first mating surface; and

an implant portion formed from at least a second material more dense than said first material, said implant portion comprising;

a fixation cavity configured to receive at least a portion of said anchor fixation head, said fixation cavity including an anchor facing surface extending from an opening thereof, said anchor facing surface including a second mating surface configured to form a frictional connection with said first mating surface; and

a first load bearing surface having a contour for articulating against a cooperating, second articulating surface associated with a second bone of said joint;

wherein said anchor fixation head has a cross-section that is greater than a cross-section of said anchor; and

wherein said anchor facing surface has a generally hemispherical shape.