Booth K C, Donaldson T K, Dai Q G
Associated Orthopaedic Surgeons of Hayward, Calif, USA.
Orthopedics. 1998 Nov;21(11):1173-6. doi: 10.3928/0147-7447-19981101-04.
This biomechanical study evaluated two different methods of femoral neck fracture fixation. Ten pairs of embalmed femora were used. A standardized midcervical osteotomy was performed. One side from each pair was fixed with either conventional (central) or calcar (cortical adjacent) screw placement. The femora pairs then were subjected to cyclic and load to failure biomechanical testing. The results demonstrated significant improved stability, load, stiffness, and displacement in all tested parameters for the group with calcar screw fixation. Grossly, the conventional fixation group tended to fail in an excessively varus position, while the calcar fixation group failed with impaction of the head on the calcar, a potentially stable position.
这项生物力学研究评估了两种不同的股骨颈骨折固定方法。使用了十对防腐处理过的股骨。进行了标准化的颈中部截骨术。每对股骨的一侧采用传统（中心）或股骨距（皮质相邻）螺钉置入方式进行固定。然后对这些股骨对进行循环加载直至破坏的生物力学测试。结果表明，股骨距螺钉固定组在所有测试参数中的稳定性、负荷、刚度和位移均有显著改善。总体而言，传统固定组倾向于在过度内翻位失效，而股骨距固定组在股骨头撞击股骨距时失效，这是一个潜在稳定的位置。
