摘要
背景:松质骨力学特性在代谢性疾病、骨折、关节退行性变的内在发生规律中具有意义。目的:了解松质骨的生物力学特性。设计:以股骨标本为单一样本的实验观察。单位:上海第二医科大学附属第九人民医院骨科生物力学实验室。对象:2001-05/07完成于在上海第九人民医院骨科生物力学实验室,选取19具男性尸体股骨头。方法:取19具新鲜青年(30岁左右)尸体股骨。对股骨头负重区的松质骨进行压缩测试。主要观察指标:标本的屈服载荷、极限应力、极限应变、能量值、弹性模量。结果:测算松质骨各项压缩数据,其中屈服载荷的平均值为(410.64±190.29)N,极限应力为(8.69±3.75)MPa,极限应变为(10.84±6.58)%,能量值为(2.54±1.89)J,弹性模量为(40.77±32.12)MPa。加载初期松质骨呈弹性变形,此后横截面增大抗压能力增强。结论:试验表明松质骨力学性能主要是缓解外力冲击加压。
BACKGROUND:Properties of cancellous bone is significant for metabolic disease s,fracture and joint retrograde diseases. OBJECTIVE:To study the biomechanical properties of cancellous bone. DESIGN:Experimental observation based on femur specimens as the single sample . SETTING:Laboratory of Orthopaedic Biomechanics Ninth Affiliated Hospital Shan ghai Second Medical University. PARTICIPANTS:The study was completed in the Laboratory of Orthopaedic Biomech anics,Shanghai Ninth People's Hospital from May to July in 2001,totally 19 male cadaveric femoral heads were selected. METHODS:Totally 19 cadeveric cancellouce bone specimens(about 30 years old) f rom the bearing area of fresh femur head were tested by compression test. MAIN OUTCOME MEASURES:Yield load limiting stress,limiting strain,energy value and elastic modulus of specimens. RESULTS:The compressive data of cancellous bone were measured,the average val ue of yield load was ( 410.64± 190.29) N ,limiting stress was ( 8.69± 3.75 ) MPa, limiting strain was ( 10.84± 6.58) % ,energy value was ( 2.54± 1.8 9) J,modulus of elasticity was ( 40.77± 32.12) MPa,At the early time of load ing,the cancellous bone showed elastic deformation,then cross section area enlar ged and compressive strength increased. CONCLUSION:The trial indicates that biomechanical properties lighten the pres sure of external compression.
出处
《中国临床康复》
CSCD
北大核心
2005年第18期238-239,共2页
Chinese Journal of Clinical Rehabilitation
