目的:探討應用全髖關節置換術治療髖臼發育不良繼發骨性關節炎時臼杯假體安放的方法及其對手術療效的影響。方法:對18例(20髖)髖臼發育不良繼發骨性關節炎的患者進行全髖置換術時,術前應用影像學方法評估髖臼和股骨的形態學變化。術中盡量將假體安放在真臼位置,無法將假體安放在真臼位置時,將假體位置適當上移。術後以步態、肢體長度、放射學改變作為療效判定標準。結果:患髖疼痛和跛行較術前明顯減輕,無脫位及神經損傷等併發症。臼杯假體安置於真臼內者12髖,安放於真臼偏高位者8髖。12例基本恢復雙下肢等長。8例患肢短縮均在2cm以內。結論:根據術前評估,選擇合適的髖臼重建方法進行全髖關節置換,對成人先天性髖臼發育不良可獲得較好療效。
Objective: To explore the method and the effects of placement of the acetabular components in treatment of degenerative osteoarthrosis secondary to congenital dysplasia of acetabulum with total hip arthroplasty (THA). Methods: Eighteen cases (20 hips) with osteoarthritis secondary to developmental dysplasia of the hip (DDH) were treated with THA. Before operation, the morphological changes of acetabular and femurs were evaluated with radiographic examination. During the operation,the acetabulum were reconstructed at the level of real acetabulum. When the prosthesis cannot be placed in the real acetabulum, it should be placed upward according the situation. The patients were all evaluated with radiographic examination, walking gait and limb length. Results: After the operation, the pain and lameness were completely relieved.12 prostheses were placed inside the real acetabulum, with no difference in bilateral limb length after recovery.8cases were placed slightly higher, with a length shorten less than 2cm. Conclusion: Choosing suitable way of acetabular reconstrction can acquire good therapeutic effect in total hip replacement of adult hip dysplasia according to preoperative evaluation.