since 1975 , 22 duplicated thumbs in 21 children were treated by ablation of one of the digits , elevation of a ligament and periosteal flap from the proximal bone , reduction osteotomy to narrow the widened proximal bone , centralization of the retained thumb , and stabilization of the joint by reattaching the ligament and periosteal flap .
C0029468
osteotomy
C0262950
bone