[Massive osteocartilaginous allografts in the treatment of articular necrosis or loss of substance].

The problem of articular reconstruction arises increasingly often during the treatment of bone tumors because of the progress made in the choice of the chemotherapy. The excellent tolerance of osteocartilaginous allografts allows extending their indications to common traumatology. The biological, immunological, mechanical and clinical studies offer encouraging prospects in the field of massive osteocartilaginous grafts. Massive prosthesis are also used more and more often in case of recurrence or of prosthesis detachment. They may benefit from these techniques by using a sheath made of bank bone. These grafts allow increasing the stock of bone, which was so far constantly decreasing on the occasion of successive operations.