摘要
为进一步探讨矩形髓内钉良好疗效的生物力学机制 ,设计本实验研究。 1 2对 2 4根人体胫骨标本分为两组 ,以同一人体左右侧作自身对照。实验组行矩形髓内钉固定 ,对照组行Ender钉固定。其中 6对标本行扭转试验 ,测量扭转变形位移及扭角值 ,描绘扭矩—扭角曲线 ,并计算扭转刚度 ,结果进行统计学处理 (t检验 )。其余 6对标本按内→外、外→内、前→后、后→前四个方向 ,行三点弯曲试验 ,测量弯曲负载、角位移值 ,数据处理同前。结果显示实验组的扭转负载及前、后弯曲负载均大于对照组 (Ender钉 ) (P <0 0 1 ) ,而侧方弯曲负载与对照组无显著性差异 (P >0 0 5)。实验组内旋扭转刚度为对照组的 3 3倍 ;外旋扭转刚度为对照组 4 6倍 ;前→后弯曲刚度为对照组的 4 1倍 ;后→前弯曲刚度为对照组 1 7倍。认为矩形髓内钉在抗旋转及前后抗弯等生物力学性能方面优于Ender钉。
Following experiment was done to evaluate the biomechanical mechanism of Rectangle-shaped intramedullary nails(RIN),which was designed by Prof Wu Yuesong in 1977 Twelve healthy adult cadavers were used,24 tibias were fractured and fixed with RIN and three point bending tests were examined in two groups,the torsion moment-torsion angle curve,bending loads-defletion curve and their stiffness were drawn and compaired statistically Results:The anti-torsional ability of RIN is better than the Ender's nailing group(P<0 01),while in bending test,the lateral bending stiffness of tow groups were the same(P>0 05),and the antero-posterior bending stiffness of RIN was greater than Ender’s nailing(P<0 01) Authors consider that the anti-torsion and anti-bending ability in antero-posterior position of RIN were better than the Ender nail,while the lateral bending ability of two groups were the same
出处
《骨与关节损伤杂志》
1999年第6期384-387,共4页
The Journal of Bone and Joint Injury
关键词
胫腓骨骨折
生物力学
矩形髓内钉
骨折固定术
Tibiofibular fracture
Biomechanics
Rectangle-shaped intramedullary nails
Ender's nails
