Cartilage is a white, gristle-like material that covers the ends of bones where they come in contact with each other.

Torn cartilage can be treated by:

• Autologous chondrocyte implantation (ACI): Cartilage cannot repair or replace itself. A new technique - autologous chondrocyte implantation (ACI) - can be used to create new, healthy cartilage to replace injured areas. This can be used only on select patients. Healthy cartilage cells are taken from your hip through an arthroscopy. These cartilage cells are used to create healthy new cartilage cells (chondrocytes). This process takes three to four weeks. The damaged cartilage is then removed and replaced by the new cells. Over time, the cells fill in the damaged area. With physical therapy, you should be able to go back to all activities and sports.
• Arthroscopic surgery to remove pieces of torn cartilage or sew then back together.