磷酸钙水泥填充固定桡骨远端骨折的抗旋转生物力学研究  

A biomechanical analysis of anti-rotation by fixation of distal radial fractures with calcium phosphate cement

作　　者：苗军[1] 王继芳[2] 夏群[1] 刘春蓉[1] 

机构地区：[1]天津医院脊柱外科,200311 [2]解放军总医院骨科

出　　处：《中华创伤骨科杂志》2007年第3期251-254,共4页Chinese Journal of Orthopaedic Trauma

基　　金：国家自然科学基金（30500516）

摘　　要：目的对磷酸钙水泥（CPC）填充固定桡骨远端骨折的抗旋转应力进行评价，并与传统的克氏针固定方法进行比较。方法18根人桡骨标本制备桡骨远端骨折伴骨缺损模型，随机分为三组：克氏针固定组、CPC固定组和CPC＋克氏针联合固定组。设定扭转速度为5°／min，最大扭转角度为10°时停止。记录扭转刚度、10°内的最大扭矩及所对应的最大扭角。结果在10°的扭转范围内，CPC固定组、CPC＋克氏针联合固定组的扭转刚度、最大扭矩均比克氏针固定组大，差异有统计学意义（P〈0.01）；最大扭转角度分别为4．3°和5．0°，均比克氏针组（9．6°）小，差异有统计学意义（P〈0．01）。CPC固定组与CPC＋克氏针联合固定组之间的扭转刚度、最大扭矩及最大扭角差异无统计学意义（P〉0．05）。结论在旋转角度小于4。范围内，CPC的抗旋转固定强度要比克氏针大，超过这个范围，骨水泥就会发生断裂，CPC的有效固定范围比克氏针要小。Objective To evaluate the anti-rotation stress produced by calcium phosphate cement （CPC） fixation of distal radial fractures, in comparison with that by Kirschner wire fixation. Methods Eighteen pieces of human radius were randomized into 3 groups： Kirschner wires group, CPC group, CPC plus Kirschner wire group. The rotation speed was set at 5°/min and rotation was stopped when the torsion angle reached 10°. The torsional rigidity, the maximum torque within 10° and its corresponding maximum torsion angle were recorded. Results Within 10° of torsion, the torsion rigidity and maximum torque in CPC and CPC plus Kirschner wire groups were statistically higher than in Kirschner wire group （ P 〈 0. 01 ）, but the maximum torsion angles in the two groups fixed with CPC were significantly lower than in Kirschner wire group （ P 〈 0. 01）. There were no significant differences between the two groups fixed with CPC in torsional rigidity, maximum torque and its corresponding maximum torsion angle （ P 〉 0. 05） . Conclusion Within 4° of rotation angle, the anti-rotation strength of CPC is stronger than that of Kirschner wires, but CPC will break beyond the range.

关 键 词：桡骨骨折 磷酸钙水泥 生物力学 克氏针 

分 类 号：R686[医药卫生—骨科学]