Kaneuji Ayumi, Sugimori Tanzo, Ichiseki Toru, Fukui Kiyokazu, Yamada Kengo, Matsumoto Tadami
Department of Orthopaedic Surgery, Kanazawa Medical University, Ishikawa, Japan.
Int Orthop. 2006 Oct;30(5):387-90. doi: 10.1007/s00264-006-0112-0. Epub 2006 Apr 14.
We studied the relationship between stem subsidence and improvement in the initial radiolucency at the bone-cement interface in polished- and rough-surface stems. Stem subsidence was seen in 34 of 42 hips (81.0%), and improvement in the initial radiolucency was seen in 15 hips (35.7%) in collarless polished tapered stems at 1 year after operation. In polished stems, stem subsidence in cases with improvement in the initial radiolucency was significantly greater than in those with no change (average 1.12 mm and 0.48 mm, P<0.005). In rough-surface stems partially coated with polymethylmethacrylate (VerSys Cemented Plus), no stem subsidence and no improvement in the initial radiolucency was seen. In polished stems, stem subsidence leads to cement creep and compressive force on the bone-cement interface and can improve the initial radiolucency.
我们研究了在光滑表面和粗糙表面假体柄中，假体柄下沉与骨水泥界面初始透亮带改善之间的关系。在无领光滑锥形柄假体中，术后1年时，42例髋关节中有34例（81.0%）出现假体柄下沉，15例（35.7%）初始透亮带得到改善。在光滑柄假体中，初始透亮带得到改善的病例的假体柄下沉明显大于无变化的病例（平均分别为1.12 mm和0.48 mm，P<0.005）。在部分涂有聚甲基丙烯酸甲酯的粗糙表面假体柄（VerSys骨水泥增强型）中，未观察到假体柄下沉和初始透亮带改善。在光滑柄假体中，假体柄下沉会导致骨水泥蠕变以及骨水泥界面上的压力，并可改善初始透亮带。
