We performed the two kind of operation for osteochondritis dissecans (OCD) of humeral capitellum in teenaged sports players. We compared of the results between the two kinds of operation. One is osteochondrosynthesis with iliac bone graft by mini screw after curettage of necrotic subchondral bone for early stage of OCD. Another is osteochondral autograft transplantation (mosaic plasty1) from knee joint for advanced stage of OCD. Since 2000 osteochondrosynthesis was performed on 28 elbows. On the other side, osteochondral autograft transplantation was performed on 10 elbows since 2004. In early stage group, the mean clinical score significantly improved from 128.6 points to 154.8 points postoperatively. Two of 28 patients were decreased slightly in sports activity. 26 patients were able to return to sports activity completely. In advanced stage group, the mean clinical score significantly improved from 133 points to 160 points postoperatively. One of 10 patients was decreased relatively in sports activity. Nine patients were able to return to sports activity completely. Both operative procedures don't change the alignment which load to humeral capitellum in throwing phase. So the most important point not to recur is improving the throwing form.
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