Multi-stage collagen-based template or implant for use in the repair of cartilage lesions
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United States of America Patent
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Jun 27, 2000
Grant Date -
N/A
app pub date -
Feb 10, 1995
filing date -
Feb 10, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is a template to aid in the regeneration of articular cartilage. The template is formed by combining a porous collagen sponge ('collagen matrix') with a dense collagen membrane. The dense collagen membrane is placed on the surface of the cartilage defect to prevent cell migration from the subchondral plate and vasculature. The collagen membrane will allow movement and exchange of fluids, nutrients, cytokines and other factors necessary for cartilage regeneration. The collagen matrix has been developed to allow attachment and growth of cells, specifically chondrocytes which are normally found in articular cartilage. The collagen matrix can be combined with chondrocytes in vitro, and therefore serve to transport cultured cells to the defect site and to retain the cells in position following implantation. Procedures are described to effectively use the two-staged template, and to fix the template to the repair site.
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