Clark D I, Crofts C E, Saleh M
University of Sheffield, England.
J Bone Joint Surg Br. 1990 Sep;72(5):797-800. doi: 10.1302/0301-620X.72B5.2211759.
The rigidity of a sliding compression screw and three cannulated lag screws in the treatment of subcapital fractures was compared in five pairs of female cadaver femora. There were no significant differences between the compressive strength, bone density, cortical thickness or Singh index of the bones in each pair. A subcapital fracture was standardised using a perpendicular saw cut across the femoral neck. A uniaxial 'load test system' with force and length measurement facilities was used to mimic cyclical stressing applied in vivo at a frequency of 0.5 Hz from 0 to 3 times body-weight. There was no significant difference between the fixation afforded by the sliding compression screw and three lag screws. Bone quality was the single most important factor in the stability of the bone implant unit.
在五对女性尸体股骨中比较了滑动加压螺钉和三根空心拉力螺钉治疗股骨颈骨折的刚性。每对骨骼的抗压强度、骨密度、皮质厚度或辛格指数之间均无显著差异。通过在股骨颈上垂直锯切将股骨颈骨折标准化。使用具有力和长度测量功能的单轴“加载测试系统”，以0.5Hz的频率模拟体内从0至3倍体重的周期性应力。滑动加压螺钉和三根拉力螺钉提供的固定效果之间无显著差异。骨质是骨植入单元稳定性的唯一最重要因素。
