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 ordered 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.
3 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.
105 Citations
19 Claims
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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 ordered 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)
Specification