Fig. 2

The radiographs illustrated a 41-year-old man with bilateral Legg-Calve-Perthes disease (LCPD) treated by total hip arthroplasty (THA) with the monobloc stem. a Preoperative anteroposterior view. b: Postoperative radiographic image. The hip was reconstructed at the level of the anatomic hip center by total hip arthroplasty. No complication occurred during the operation. c At 4-year follow-up, no radiolucent lines were found. d At the 11-year follow-up, no migration, osteolysis, or subsidence was detected. The femoral and acetabular components were considered stable