髋臼横断骨折不同内固定方式的生物力学研究

Biomechanical study of transverse acetabular fracture fixations

目的 对髋臼横断骨折３种常用的内固定办法进行生物力学比较．方 法 取１２个半骨盆标本模拟髓臼横断骨折，随机分为３组，分别按下列方法内固定：①前柱单钢板，②后柱单钢板，③后柱双钢板．通过股骨头对髋臼进行连续垂直加载，直于内固定失败． 结果 髓臼横断骨折前柱单钢板内固定，后柱单钢板内固定及后柱双钢板内固定能承受的最大负载分别为［（４８９±７１）Ｎ，（２５２＋９２）Ｎ及（１０４０±１４３）Ｎ）］．结论 前柱单钢板内固定的稳定性高于后柱单钢板内固定，而后柱双钢板内固定的稳定性最强．

Objective To evaluate the stability of three kinds of internal fixations requiring anterior or posterior surgical approach for the transverse acetabular fracture. Methods Twelve hemipelves were made to be transverse acetabular fractures by a saw and then divided into three groups randomly Internal fixation methods consisted of a single anterior column plate, a single posterior column plate and double posterior column plates. The loads were applied through through the femoral head in a continuous fashion until the internal fixation failed. Results The maximal loads for the anterior plate, posterior plate and double posterior plates were as fo1lows: (489 ± 71 ) N, (252 + 92 ) N and (l040±l43 ) N. Conclusions The single anterior column plate provided more stability than the single posterior column plate. The double posterior column plates provided a degree of stability indistingishable from that of other two methods.