Granted Patent B2

US 9,707,082 · App. 14/246,930 · Granted Jul 18, 2017

Abstract

Claims (17)

1. A bifunctional assembled implant adapted for implantation at a non-load bearing site of a bone cartilage junction, comprising:

an osteoconductive portion, comprising cancellous bone, adapted to fill a defect in a subchondral bone layer; and

a chondroinductive portion, comprising fully demineralized cortical bone, adapted to fill a cartilage layer adjacent to the subchondral bone layer;

wherein said osteoconductive portion and said chondroinductive portion are assembled in a stacked relationship without separate fasteners or adhesives;

wherein said osteoconductive portion and said chondroinductive portion each defines a characteristic depth and a characteristic width; and wherein said characteristic depth of said osteoconductive portion is substantially equivalent to or greater than said characteristic depth of said chondroinductive portion; and

wherein said osteoconductive portion and said chondroinductive portion are assembled to have an interference fit; and

wherein said implant is adapted to backfill a secondary site created during an autograft cartilage repair procedure in a human patient.

2. The implant of claim 1 , wherein said characteristic depth of said osteoconductive portion is at least about one and one half times greater than said characteristic depth of said chondroinductive portion; and wherein said characteristic width of said osteoconductive portion is substantially the same as said characteristic width of said chondroinductive portion.

3. The implant of claim 1 , wherein said interference fit is a hydration controlled shrink fit.

4. The implant of claim 1 , wherein said interference fit further comprises a shaft and bore fit between said osteoconductive portion and said chondroinductive portion, and the shaft is straight or tapered.

5. The implant of claim 1 , wherein said chondroinductive portion comprises from two to eight pieces of cortical bone.

6. The implant of claim 5 , wherein said chondroinductive portion comprises two pieces of cortical bone.

7. The implant of claim 6 , wherein said two pieces of cortical bone each make up about one half of said chondroinductive portion.

8. The implant of claim 1 , wherein said osteoconductive portion substantially surrounds at least one part of said chondroinductive portion.

9. The implant of claim 1 , wherein said chondroinductive portion comprises allograft bone, xenograft bone, or a combination thereof.

10. The implant of claim 1 , wherein said cortical bone material further includes one or more canals, said canals being oriented in a direction providing transport between said cancellous bone and said cortical bone.

11. A method of using an assembled osteochondral implant, comprising filling a defect site with said bifunctional assembled implant of claim 1 , such that a first region of said defect site is filled by osteoconductive cancellous bone material and a second region of said defect site is filled by chondroinductive cortical bone material.

Assignments (14)