长骨内开口效应对其力学性能影响的理论模型研究  

A Theoretical Model Study of Open Section Effect on the Mechanical Properties of Long Bone

作　　者：赵文志[1] 刘迎曦[1] 张军[1] 李守巨[1] 李靖年[2] 孙晓江[2] 

机构地区：[1]大连理工大学工程力学系工业装备结构分析国家重点实验室,大连116024 [2]大连医科大学第二临床学院骨科,大连116023

出　　处：《生物医学工程学杂志》2005年第5期1052-1054,共3页Journal of Biomedical Engineering

摘　　要：建立一个股骨中段的外侧皮质带有矩形开口的力学模型,采用有限元方法,计算骨开口区的尺寸改变时,股骨的扭转刚度和应力分布的变化。结果表明:骨开口长度为骨外径的1倍时(1OD),对股骨扭转刚度和剪应力分布的影响较小;开口长度从2OD增至4OD时扭转刚度急剧减小,而且剪应力的最大值位于开口区中心。本结论对临床骨科的手术治疗方法和骨开口尺寸的控制提供了重要的理论依据。The mechanical model of femur mid-diaphysis with a rectangular open section in the exterior cortex was developed and a finite element method was adopted in calculating and analysing the changes of torsional stiffness and the stress distribution when the dimension of the open section altered. It showed that the open section with a length of 10D（femur mid-diaphysis diameter） had little influence on the femur torsional stiffness or stress distribution. The torsional stiffness decreased most dramatically as the length increased from 2 to 40D, Shear stress peaked at the center of the open section. This conclusion provides an important theoretical ground for the operative methods and the dimension control of an open section in clinical orthopaedics.

关 键 词：开口效应 力学模型 扭转刚度 有限元方法 开口 骨内 理论模型 力学性能 手术治疗方法 应力分布 有限元方法 骨扭转 力学模型 

分 类 号：R318.01[医药卫生—生物医学工程]