Abstract：Objective To observe the acetabular anatomical features of end-stage osteoarthritis in adult developmental dysplasia of the hip(DDH) and discuss the characteristics and acetabular reconstruction of each acetabular defect that occurred in total hip replacement(THR). Methods From March 2003 to September 2012, 72 hips of 60 patients with end-stage osteoarthritis of adult DDH were performed THR. Acetabular anatomical and acetabular defect characteristics were observed after the grind acetabulum with depth of bottom of Harris fossa and with concentric round at the center of acetabulum. According to the defect size and the impact on the acetabular prosthesis initial stability, the patients were performed operation with no bone graft, morselized allograft and structural bone graft. Results In 72 hips, 20 hips were found to be the shape of shallow cup, which included 14 cases of Crowe Ⅰ type, 4 cases of Crowe Ⅱ type and 2 cases of Crowe Ⅳ type.In these hips, the acetabular defect less than 10% was 15 hips, from 10% to 30% was 5 hips.Twenty-two hips were found to be the shape of shallow dish, which included 2 cases of Crowe Ⅰ, 16 cases of Crowe Ⅱ type and 4 cases of Crowe Ⅲ type.In these hips, the acetabular defect less than 10% was 2 hips, from 10% to 30% was 16 hips, more than 30% was 4 hips.Twenty hips were found to be the conchoidal shape, which included 3 cases of Crowe Ⅱ and 17 cases of Crowe Ⅲ type.In these hips, the acetabular defect less than 10% was 1 hip, from 10% to 30% was 5 hips, more than 30% in 14 hips.Ten hips were found to be the triangular shape, found only in Crowe Ⅳ type, in which the acetabular defect less than 10% was 8 hips, from 10% to 30% was 2 hips.In the patients with acetabular defect less than 10%, the acetabular prosthesis was stability, no bone graft was needed.The acetabular prosthesis is less stable in the patients with acetabular defect from 10% to 30%, the morselized allograft was performed.The acetabular prosthesis was not stable in the patients with acetabular defect more than 30%, the structural bone graft was performed. Conclusions The acetabulum of end-stage osteoarthritis in adult developmental dysplasia of the hip shows four anatomical shapes of shallow cup,shallow dish, shell and triangle.The acetabular reconstruction method should be detemined according to the acetabular defect characteristics and the impact on the acetabular prosthesis initial stability in total hip arthroplasty.
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2014, Vol. 19 
