When Chiari osteotomy in coxarthrosis with severe acetabular dysplasia were considered ineffective, bone grafting to osteotomy site after medial displacement osteotomy was effective procedure.
This procedure was performed in the four cases. Three cases of them had satisfactory results, but one poor because of severe contracture of the hip joint.
In the coxarthrosis with severe acetabular dysplasia in which acetabular head quotient was less than 50 and CE angle negative, Chiari osteotomy with bone grafting was seemed to be one of the effective procedures.
