The U.S. Food and Drug Administration approved Maci (autologous cultured chondrocytes on porcine collagen membrane) for the repair of symptomatic, full-thickness cartilage defects of the knee in adult patients. Maci is the first FDA-approved product that applies the process of tissue engineering to grow cells on scaffolds using healthy cartilage tissue from the patient’s own knee. Maci is manufactured by Vericel Corporation, headquartered in Cambridge, Massachusetts.