摘要
目的：探讨骨制松质骨螺钉的生物力学性能。方法：牙形角 ５０°螺钉为实验组，牙形角３８°螺钉为对照组。分别对骨制松质骨螺钉的抗拔力、抗扭转力、界面应力进行实验研究和摩擦系数、应变能密度因子等进行力学分析。结果：研制的方头骨螺钉（牙形角５０°）与一字槽骨螺钉（牙形角３８°）有显著性差异（Ｐ＜０．０１）。结论：大角度螺纹角抗损伤能力强，方头骨螺钉与周围松质骨组织嵌合紧密，是关节内骨折的有效内固定物。
Object: To study the biomechanical properties on the boned concellous screw. Metheds: Designed square- headed bony screw with thread of large angle 50 (test group) and the notch-headed boned screw with thread of small angle 38 (control group)were taken. Holding-force , Torsion -force. Interface -bonding-strength. Friction - coefficient and Strain -energy -density -factor were measured and mechanic analysised. Result: There was significant difference between test group and control group (p<0.05). Conclusion: The thread with large angle50 has more anti-destroy capacity. The square-headed bony screw toughly attaches to the peripheral woven bone, which is a effective fixator for interarticuiar fracture.
出处
《医用生物力学》
EI
CAS
CSCD
2001年第2期99-104,共6页
Journal of Medical Biomechanics
