家兔胫骨的三点弯测试  

Revealing mechanical property of intract rabbit tibia in three-point bending test

作　　者：钟红刚[1] 刘卫华[2] 卜海滨[2] 钱民全[3] 

机构地区：[1]北京工业大学生命学院,北京100022 [2]中国中医科学院骨伤科研究所 [3]中国科学院力学研究所

出　　处：《中国骨伤》2008年第2期103-105,共3页China Journal of Orthopaedics and Traumatology

摘　　要：目的:探讨采用工程材料力学中抗弯梁的力学模型,通过兔胫骨三点弯测试,获得整骨材料力学测试方法实用的力学参数。方法:采用10只正常成年大耳白兔下肢骨标本,共10对胫骨,行三点弯力学测试。作为骨的三维实体模型建立后,虚拟加载的一种实验对比模式。支承跨距为80mm。结果:得到10对正常大耳白兔胫骨抗弯力学参数。胫骨最大载荷所对应的加载点挠度平均值右侧(2.737±0.262)mm,左侧(2.739±0.233)mm;胫骨的最大载荷(代表抗弯强度)的平均值右侧(17.803±2.675)kg,左侧(18.366±2.653)kg;胫骨最大载荷前载荷-挠度曲线下面积平均值右侧(23.829±4.413)kg·mm,左侧(24.725±4.101)kg·mm;胫骨载荷￣挠度曲线线性部分斜率(代表抗弯刚性)平均值右侧(7.545±1.310)kg/mm,左侧(7.631±1.174)kg/mm。结论:正常家兔胫骨个体间差异较大,建议三点弯测试实验中采用双侧配对比较。Objective：To explore the mechanical property of intact long bone through three-point bending test of rabbit tibia according to mechanics of materials. Methods：Ten pairs of normal rabbits tibia were treated on three-point bending test with 80 mm supporting distance in order to corroborate the virtual loading test on bone model. Results：Bending stiffness and strength of 10 pairs of normal rabbit tibia were obtained. The maximum flexibility of the right and the left tibia was （2.737±0.262） mm and （2.739±0.233） mm respectively. The maximum load,which indicated the bending strength,of the right and the left tibia was（17.803±2.675） kg and （18.366±2.653） kg respectively. The area under the load-flexibility curve before fail of the right and the left tibia was （23.829±4.413） kg/mm and （24.725±4.101） kg. mm respectively. The slope of the load-flexibility curve which indicate the stiffness of the right and the left tibia was （7.545±1.310） kg/mm and （7.631± 1.174） kg.mm respectively. Conclusion ：The discrepancy between different animal body is larger than conventionally required, It＇s suggested for performing three-point bending test of long bone of the body both sides in pair.

关 键 词：胫骨 三点弯测试 兔 生物力学 

分 类 号：R826[医药卫生—临床医学] R683.42