Preparation for repairing cartilage defects or cartilage/bone defects in human or animal joints
First Claim
1. A device (10) for repairing cartilage defects or cartilage/bone defects in human or animal joints, said device comprising a bone part (11), a cartilage layer (2) grown onto the bone part (1) and forming a cartilage surface (3), and a subchondral bone plate (4) or an imitation of a such a bone plate in a transition region between the bone part (1) and the cartilage layer (2), said device being implantable into an opening or a bore (20) set up in a defective ,region such that the bone part is adapted to be anchored in the healthy bone tissue and the cartilage surface (3) is flush with a native cartilage surface (3′
- ), wherein for supporting the subchondral bone plate (4) and the cartilage layer (2) of the implanted device on at least two materials with differing resorbabilities, a cross-section of the bone part (1) is smaller than a cross section of the subchondral bone plate (4) and the cartilage layer (2) or the bone part has column regions (40, 41) that extend to the subchondral bone plate (4) and have a resorbability different from a resorbability of the regions between the column regions.
0 Assignments
0 Petitions
Accused Products
Abstract
Repairs of cartilage defects or of cartilage/bone defects in human or animal joints with the help of devices including a bone part (1), a cartilage layer (2) and a subchondral bone plate (4) or an imitation of such a plate in the transition region between the cartilage layer (2) and the bone part (1). After implantation, the bone part (4) is resorbed and is replaced by reparative tissue only after being essentially totally resorbed. In a critical phase of the healing process, a mechanically inferior cyst is located in the place of the implanted bone part (1). In order to prevent the cartilage layer (2) from sinking into the cyst space during this critical phase of the healing process the device has a top part (11). and a bottom part (12), wherein the top part (11) consists essentially of the cartilage layer (2) and the subchondral bone plate (4) and the bottom part (12) corresponds essentially to the bone part (1) and wherein the top part (11) parallel to the subchondral bone plate (4) has a larger diameter than the bottom part (12). After implantation in a suitable opening or bore (20), the cartilage layer (2) and the subchondral bone plate (4) are supported not only on the bone part (1) but also on native bone tissue having a loading capacity not changing during the healing process. Therefore, the implanted cartilage layer cannot sink during the healing process.
110 Citations
34 Claims
-
1. A device (10) for repairing cartilage defects or cartilage/bone defects in human or animal joints, said device comprising a bone part (11), a cartilage layer (2) grown onto the bone part (1) and forming a cartilage surface (3), and a subchondral bone plate (4) or an imitation of a such a bone plate in a transition region between the bone part (1) and the cartilage layer (2), said device being implantable into an opening or a bore (20) set up in a defective ,region such that the bone part is adapted to be anchored in the healthy bone tissue and the cartilage surface (3) is flush with a native cartilage surface (3′
- ), wherein for supporting the subchondral bone plate (4) and the cartilage layer (2) of the implanted device on at least two materials with differing resorbabilities, a cross-section of the bone part (1) is smaller than a cross section of the subchondral bone plate (4) and the cartilage layer (2) or the bone part has column regions (40, 41) that extend to the subchondral bone plate (4) and have a resorbability different from a resorbability of the regions between the column regions.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
20. A device for repairing cartilage defects or cartilage/bone defects in human or animal joints, said device comprising a bone part, a cartilage layer grown onto the bone part and forming a cartilage surface, and a subchondral bone plate or an imitation of a such a bone plate in a transition region between the bone part and the cartilage layer, wherein:
- (a) resorbability of the bone part is faster than resorbability of the subchondral bone plate or an imitation of a such a bone plate;
(b) the bone part of the device comprises columns that have reduced resorbability relative to the rest of the bone part; and
(c) the columns extend axially through the bone part up to the subchondral bone plate. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- (a) resorbability of the bone part is faster than resorbability of the subchondral bone plate or an imitation of a such a bone plate;
- 33. A device for repairing cartilage defects or cartilage/bone defects in human or animal joints, said device comprising a bone part, a cartilage layer grown onto the bone part and forming a cartilage surface, and a subchondral bone plate or an imitation of a such a bone plate in a transition region between the bone part and the cartilage layer, wherein the device is adapted to be implanted into a bore formed in or near a defect region of a human or animal joint, and wherein the bone part comprises at least one column having a resorbability different from the resorbability of the rest of the bone part.
Specification