- 期刊
The Study of the Interbearing Mobility of the B. G. Bipolar Endoprosthesis
B.G.雙極性人工全髖關節其內承關節可動性之研究
摘要
雙極性人工全髖關節植入後，其內承關節的可動性一直仍有爭論。本研究為收集一九八五年二月至一九八九年五月間，在省立台南醫院接受是項手術而能回院檢查的四十個病例，在無重量負荷下行內收及外展方向內承關節可動性的檢查研究，其中十九關節有二次以上的觀察。在有限的病例下，吾人發現B. G. 雙極性人工全髖關節其內承關節的可動堿在術直後皆有某種程度的喪失，此由於內外關節間摩擦性的差異及軟組織的夾板作用所造成（原發性喪失）。其後之繼發性變化視其原發病因而異，因股骨頸骨折而衛置換術者在手術三、四週後有較大量的喪失，而後即維持一定值直到髖臼或塑膠帽杯變性或破壞為止。而股骨頭缺血性壞死群，術直後喪失較小，一般皆能持續擁有原發性喪失後留下的可動域;甚或有因髖臼退化性變化厲害，磨擦力增加，其內承關節可動域有隨時間的經過而增加的趨勢。兩組間就其統計量互相比較，因股骨頭缺血性壞死而衛關節置換成形術者其內承關節可動域比股骨頸骨折群好。
關鍵字
無資料並列摘要
Under non-weight-bearing conditions, abduct-adduct movement studies were made on 40 B. G. bipolar endoprosthetic arthroplasty hip joints. The study showed that all the inner bearing joint of B. G.. bipolar endoprosthesis loses some degrees of their mobility immediately following implantation, due primarily to the friction differential between the inner and the outer bearings and soft tissue splinting (primary loss). Then a secondary change depending on their underlying causes would follow. In the group operated for femoral neck fracture, the inner bearing joint mobility had greater loss within the first 3-4 weeks after implantation following maturation of fibrous tissue around the hip joint (secondary loss), thereafter, the range of motion of the inner bearing remains constant except in those cases wherein there are acetabular cartilage or polyethylene cup deterioration. However, the cases of A. V. N. have less loss, some cases even have a tendency of increasing inter-bearing mobility with time. The study also showed a significant difference in the inner bearing joint movement in which the A. V. N. group indicates better mobility than the fracture group.