Cartilage implant assembly and method for implantation
First Claim
1. A cartilage repair assembly for repair of a defect in an articular cartilage comprising an allograft bone plug having a subchondral bone and an overlying cartilage cap, said allograft bone plug having been treated to remove cellular debris and proteoglycans and an allograft milled cartilage mixture in a biocompatible carrier surrounding at least a portion of a side wall of said allograft bone plug.
4 Assignments
0 Petitions
Accused Products
Abstract
The invention is directed toward a cartilage repair assembly comprising a shaped structure of subchondral bone with an integral overlying cartilage cap which is treated to remove cellular debris and proteoglycans and milled cartilage in a bioabsorbable carrier. The shaped structure is dimensioned to fit in a drilled bore in a cartilage defect area so that said shaped bone and cartilage cap when centered in the bore does not engage the side wall of the bore in an interference fit and is surrounded by milled cartilage and carrier. A method for inserting the assembly into a cartilage defect area is disclosed.
246 Citations
44 Claims
- 1. A cartilage repair assembly for repair of a defect in an articular cartilage comprising an allograft bone plug having a subchondral bone and an overlying cartilage cap, said allograft bone plug having been treated to remove cellular debris and proteoglycans and an allograft milled cartilage mixture in a biocompatible carrier surrounding at least a portion of a side wall of said allograft bone plug.
- 13. A cartilage repair assembly comprising a sterile shaped structure of subchondral bone with an integral overlying cartilage cap, said shaped structure being dimensioned to fit in a drilled bore in a cartilage defect area so that said shaped bone and cartilage cap when centered in the bore does not engage the side wall of the bore in an interference fit, said shaped structure being treated to remove cellular debris and proteoglycans and sterile milled cartilage pieces mixed in a carrier surrounding said bone plug in said bore.
- 24. A cartilage repair assembly comprising a sterile shaped structure of subchondral bone and overlying integral cartilage cap, said shaped structure been dimensioned to fit in a drilled bore in a cartilage defect are so that said shaped bone and hyaline cartilage cap when centered in the bore can be rotated in said bore, said bone plug being treated to remove cellular debris and proteoglycans and sterile milled cartilage pieces mixed in a bioabsorbable carrier surrounding at least a portion of a side wall of shaped structure.
- 35. A cartilage repair assembly kit comprising a sterile shaped structure of allograft subchondral bone and an overlying cartilage cap, said structure being treated to remove cellular debris and proteoglycans and housed in a first sterile container and milled allograft cartilage pieces mixed in a carrier housed in a second sterile container, said first and second sterile containers being packaged together.
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39. A method of placing a preshaped allograft implant assembly in a cartilage defect, said assembly comprising a subchondral bone and an overlying cartilage cap plug which has been treated to remove cellular debris and proteoglycans and minced cartilage in a carrier comprising the steps of:
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(a) drilling a hole in a patient at a site of a cartilage defect, a depth which equal to or less than the length of the bone and cartilage cap plug implant;
(b) placing a preshaped osteochondral plug having a cross section which is less than the cross sectional area of the hole with a length which equal to the depth of the hole allowing the structure to be moveable within said bore in the cylindrical hole; and
(c) placing a mixture of minced cartilage in a bioabsorbable carrier in the drilled cylindrical hole around the preshaped osteochondral plug. - View Dependent Claims (40, 41, 42, 43, 44)
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Specification