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There are also a number of alternative surgical techniques that are sometimes used to treat cartilage damage, including: 1  Allograft osteochondral transplantation (AOT) â similar to mosaicplasty, but the replacement cartilage is obtained from a recently deceased donor and is used to repair larger damaged areas.
More in Orthopedics. The OATS procedure, an abbreviation for osteoarticular transfer system, is a surgical procedure used to treat focal cartilage defects. OATS is one technique of several used to treat this problem; the type of procedure is called a mosaicplasty. A mosaicplasty uses cartilage from undamaged areas of the joint and moves this cartilage to a damaged area.