摘要
【目的】研究骨折端微动时应力对骨痂的弯曲刚度、扭转刚度和扭转强度的影响。【方法】60只新西兰大白兔随机分为微动组与固定组，利用万能材料实验机检测两组动物骨折端骨痂弯曲刚度、扭转刚度和扭转刚度的变化。【结果】①术后14d、21d、56d时固定组、微动组弯曲刚度差异无显著性；28d、42d时两组差异有显著性（P〈0．05）。②术后14d、21d时固定组、微动组扭转刚度差异无显著性；28d、42d、56d时差异有显著性（P〈0．05）。③术后28d、42d、56d时固定组、微动组扭转强度差异有显著性（P〈0．05）。
[Ohjective]To study the influence of micro-movement on the biomechanics of fracture callus. [Methods] Sixty rabbits were randomly divided into micro-movement group and fixation group. The bending stiffness, torsional stiffness and torsional strength were determined with biomeehanical tests. [Results]At 14d, 21d and 56d after operation, there was no statistical difference in bending stiffness between two groups（ P 〉0.05）. At 28d and 42d, there was statistical difference in bending stiffness between two groups （ P 0.05）. At 14d and 21d after operation, the torsional stiffness of micro-movement group and fixation group was very low, but there was no statistical difference between two groups（ P 〉0.05）. At 28d, 42d and 56d after operation, there was statistical difference in torsional stiffness between two groups（ P 〈0.05）. At 28d, 42d and 56d after operation, there was statistical difference in torsional stiffness between two groups （ P 〈0.05）. [Conclusion] Micro-movement can increase the biomechanics of fracture callus.
出处
《医学临床研究》
CAS
2009年第3期416-418,共3页
Journal of Clinical Research
关键词
骨折
骨痂
生物力学
fractures
callus
biomechanics
