FDA Approves First Autologous Cellularized Scaffold for the Repair of Cartilage Defects of the Knee

News Maci is composed of a patient's own (autologous) cells that are expanded and placed onto a bio-resorbable (can be broken down by the body) porcine-derived collagen membrane that is implanted over the area where the defective or damaged tissue was removed. Contributed Author: The U.S. Food and Drug Administration Topics: Orthopedics