[RESEARCH PROGRESS OF OSTEOTOMY IN TOTAL HIP ARTHROPLASTY TO TREAT CROWE TYPE IV DEVELOPMENTAL DYSPLASIA OF THE HIP].

To summarize the methods and complications of osteotomy in total hip arthroplasty (THA) to treat Crowe type IV developmental dysplasia of the hip (DDH) so as to provide the reference for selection of surgical procedures.The literature concerning THA for DDH was reviewed, and the effectiveness and complications were summarized in different methods.At present, four osteotomies are commonly used in DDH, including transtrochanteric osteotomy, subtrochanteric osteotomy, lesser trochanteric osteotomy, and distal femoral osteotomy. Transtrochanteric osteotomy and subtrochanteric osteotomy can effectively adjust leg length, correct femoral anteversion and avoid nerve injury, but transtrochanteric osteotomy may cause bone fracture and abductor injury. Lesser trochanteric osteotomy is scarcely used because of its poor effectiveness. Distal femoral osteotomy is usually used in patients with knee deformity.For patients with Crowe type IV DDH complicated by severe femoral dislocation and soft tissue spasm, subtrochanteric osteotomy should be selected, whereas it needs an associated standard focusing on how to select the osteotomy shape and length in subtrochanteric ostetomy, which needs an advanced research.