Crafting of cartilage

Patent metadata

Field	Value
Publication number	US-9744043-B2
Application number	US-82651807-A
Country	US
Kind code	B2
Filing date	Jul 16, 2007
Priority date	Jul 16, 2007
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

The invention is directed to producing a shaped cartilage matrix isolated from a human or animal where the cartilage has been crafted to facilitate disinfection, cleaning, devitalization, recellularization, and/or integration after implantation. The invention relates to a process for repairing a cartilage defect and implantation of a cartilage graft into a human or animal by crafting the cartilage matrix into individual grafts, disinfecting and cleaning the cartilage graft, applying a pretreatment solution to the cartilage graft, removing cellular debris using an extracting solution to produce a devitalized cartilage graft, implanting the cartilage graft into the cartilage defect with or without an insertion device, and sealing the implanted cartilage graft with recipient tissue. The devitalized cartilage graft is optionally recellularized in vitro, in vivo, or in situ with viable cells to render the tissue vital before or after the implantation. The devitalized cartilage graft is also optionally stored between the removing cellular debris and the recellularizing steps.

First claim

What is claimed:

1. A cartilage graft comprising subchondral bone, and
shaped, modified cartilage with a superficial surface, an opposing interface surface and a side surface therebetween,
wherein the shaped, modified cartilage is cartilage allograft, xenograft or autograft modified to contain one or more gaps, bores, slots, and/or channels which penetrate the interface surface but do not penetrate the superficial surface of the shaped, modified cartilage,
and the superficial surface is not in contact with the subchondral bone.

2. The cartilage graft of claim 1 , wherein the shaped, modified cartilage is isolated from whole condyles, whole plateaus, hemicondyles, hemiplateaus, femoral heads, phalanges, talus, tibia, fibula, rib, intervertebral discs, menisci, nose, or ear.

3. The cartilage graft of claim 1 , wherein the shaped, modified cartilage is attached to the subchondral bone at the interface surface.

4. The cartilage graft of claim 3 , wherein the shaped, modified cartilage is shaped as or as part of whole condyles, whole plateaus, hemicondyles, hemiplateaus, femoral heads, talus, tibia, fibula, rib or intervertebral discs.

5. The cartilage graft of claim 1 , wherein the shaped, modified cartilage has a circular, square, triangular, or star shape.

6. An osteochondral plug comprising the cartilage graft of claim 1 ,
wherein the subchondral bone comprises a cartilage/bone interface surface and a distal surface,
wherein the subchondral bone is attached to the shaped, modified cartilage at the cartilage/bone interface surface;
wherein the osteochondral plug is crafted into a straight cylindrical shape, a tapered cylindrical shape, a step cylindrical shape, or a dumbbell shape;
wherein the subchondral bone is modified to have one or more gaps, bores, slots, and/or channels;
wherein the one or more gaps, bores, slots, and/or channels of the subchondral bone are empty and hollow; and
wherein the one or more empty and hollow gaps, bores, slots, and/or channels of the shaped, modified cartilage are aligned with the one or more empty and hollow gaps, bores, slots, and/or channels of the subchondral bone.

7. The osteochondral plug of claim 6 , wherein the subchondral bone is crafted to have the one or more empty and hollow gaps.

8. The osteochondral plug of claim 6 , wherein the osteochondral plug is drilled and/or milled from the distal surface of the subchondral bone to form the one or more empty and hollow channels of the subchondral bone.

9. The osteochondral plug of claim 6 , wherein the osteochondral plug is cylindrical and is drilled and/or milled on a surface of the subchondral bone at the cartilage/bone interface surface to form the one or more through channels of the subchondral bone that are perpendicular to the superficial surface of the shaped, modified cartilage.

10. The osteochondral plug of claim 6 , wherein the osteochondral plug is cylindrical and is drilled and/or milled on a surface of the subchondral bone at the cartilage/bone interface surface to form the one or more empty and hollow slots of the subchondral bone that are perpendicular to the superficial surface of the shaped, modified cartilage.

11. The osteochondral plug of claim 6 , wherein the side surface of the shaped, modified cartilage is modified to facilitate the integration of the osteochondral plug into a recipient tissue.

12. The osteochondral plug of claim 11 , wherein the shaped, modified cartilage has a star shape or tapered cylindrical shape.

13. The osteochondral plug of claim 11 , wherein the side surface of the shaped, modified cartilage comprises microparticles or embossing with a straight or non-straight line pattern or cross-line pattern onto the side surface.

14. The osteochondral plug of claim 6 , wherein the side surface and/or the superficial surface of the shaped, modified cartilage is microperforated.

15. The osteochondral plug of claim 6 , wherein the one or more gaps, bores, slots, and/or channels of the subchondral bone include a bone filler.

16. The osteochondral plug of claim 6 , wherein the cartilage graft and the subchondral bone are naturally integrated.

17. The osteochondral plug of claim 16 , wherein the naturally integrated cartilage graft and subchondral bone are harvested together from whole condyles, whole plateaus, hemicondyles, hemiplateaus, femoral heads, phalanges, talus, tibia, fibula, rib, intervertebral discs, or menisci.

18. The cartilage graft of claim 1 , wherein the shaped, modified cartilage is shaped as a disc, and the disc has the one or more empty and hollow gaps that are distal to the superficial surface of the disc.

19. The cartilage graft of claim 1 , wherein the shaped, modified cartilage is shaped as a disc, and the disc has the one or more empty and hollow channels that are essentially perpendicular to the superficial surface of the disc.

20. The cartilage graft of claim 1 , wherein the shaped, modified cartilage is cartilage allograft.

21. A process for repairing a cartilage defect in a subject, the method comprising
a. crafting the cartilage graft of claim 1 into an individual graft;
b. disinfecting and cleaning the cartilage graft;
c. applying a pretreatment solution to the cartilage graft;
d. removing cellular debris using an extracting solution to produce a devitalized cartilage graft;
e. implanting the devitalized cartilage graft into an area in the subject comprising the cartilage defect; and
f. sealing the implanted devitalized cartilage graft to recipient tissue.

22. The process of claim 21 , wherein the devitalized cartilage graft is stored prior to implantation.

23. The process of claim 22 , further comprising recellularizing the devitalized cartilage graft prior to implanting.

24. The process of claim 22 , further comprising recellularizing the devitalized cartilage graft after implanting.

Assignees

• Chen Silvia S
• Qin Xiaofei
• Chen Jingsong
• Wolfinbarger Jr Lloyd
• Lifenet Health

Inventors

• Chen Silvia S
• Qin Xiaofei
• Chen Jingsong
• Wolfinbarger Jr Lloyd

Classifications

• A61L27/3612

  Cartilage, synovial fluid · CPC title

• A61F2002/4648

  Means for culturing bone graft · CPC title

• A61F2/4644

  Preparation of bone graft, bone plugs or bone dowels, e.g. grinding or milling bone material (bone material A61F2/28; disintegrating or milling devices B02C) · CPC title

• A61F2002/30004

  the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis · CPC title

• A61F2/30756 Primary

  Cartilage endoprostheses (A61F2/3603 takes precedence) · CPC title