Doyle J, Hayes P, Fenlon G
U.C.D. Engineering Department, Dublin Republic of Ireland.
Arch Orthop Trauma Surg (1978). 1988;107(6):377-80. doi: 10.1007/BF00381066.
The effects of same-fragment pin pretensioning on the rigidity of a simple fixator system were investigated. An external fixator device constructed to apply same-fragment pin pretensioning of a defined amount was applied to a bone model made of pedilen cylinders. System rigidity was tested for varying degrees of pin pretensioning in axial compression and AP bending. Pin pretensioning, bringing transfixing pins together, tended to weaken the system in both modalities tested. Tensioning by bringing the pins apart increased the rigidity of the system in AP bending and axial compression.
研究了同片段钢针预紧对简单固定器系统刚度的影响。将一个用于施加规定量同片段钢针预紧的外固定装置应用于由骨圆柱体制成的骨模型上。在轴向压缩和前后位弯曲中，针对不同程度的钢针预紧测试了系统刚度。使贯穿钢针靠拢的钢针预紧往往会削弱所测试的两种模式下的系统。通过使钢针分开进行张紧可提高系统在前后位弯曲和轴向压缩中的刚度。
