中国组织工程研究

中国组织工程研究 ›› 2012, Vol. 16 ›› Issue (17): 3045-3047.doi: 10.3969/j.issn.1673-8225.2012.17.002

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

不同状态下股骨的应力分布及临床应用☆

方国芳1，林荔军2，于  博2，敖  俊2   

  1. 1东莞康华医院脊柱关节科，广东省东莞市523080；2南方医科大学附属珠江医院骨科中心，广东省广州市510280
  • 收稿日期:2011-08-16 修回日期:2011-11-10 出版日期:2012-04-22 发布日期:2012-04-22
  • 作者简介:方国芳☆，男，1977年生，福建省莆田市人，汉族，南方医科大学在读博士，主要从事骨科专业方面的研究。fanguofan@163.com

Stress distribution and clinical application of the femur under different states 

Fang Guo-fang1, Lin Li-jun2, Yu Bo2, Ao Jun2   

  1. 1Department of Spine and Bone Joint, Dongguan Kanghua Hospital, Dongguan  523080, Guangdong Province, China; 2Orthopaedic Center, Affiliated Zhujiang Hospital of Southern Medical University, Guangzhou  510280, Guangdong Province, China
  • Received:2011-08-16 Revised:2011-11-10 Online:2012-04-22 Published:2012-04-22
  • About author:Fang Guo-fang☆, Studying for doctorate, Southern Medical University, Guangzhou 510280, Guangdong Province, China fanguofan@163.com

PDF

382

被引次数

23

摘要：

背景：对股骨骨折的类型作出新的力学分类，突破以往单纯从肌肉的牵拉来解释股骨骨折的分类，同时也为进一步进行内固定物的力学提供进一步研究方向。
目的：探讨股骨在不同状态下的应力分布。
方法：利用有限元的方法进行股骨三维重建，然后对股骨的不同部位进行约束、应力分布，以模拟不同状态下的应力最集中的部分，从而为临床股骨骨折内固定提供建议。
结果与结论：股骨在直立行走时，应力主要集中在股骨的中段，在中下段有一螺旋形的应力集中区。在跪立位时，股骨下段的应力明显增加，而且在股骨髁间出现应力集中。在向后摔倒位时，应力主要集中在股骨颈的部位。说明股骨在不同状态的应力集中的部位不尽相同，因此出现不同类型的骨折类型，进而为内固定后如何减少内固定物的应力、避免内固定失败提供科学依据。
关键词：应力分布；股骨；三维重建；有限元；内固定物
doi:10.3969/j.issn.1673-8225.2012.17.002

关键词: 应力分布, 股骨, 三维重建, 有限元, 内固定物

Abstract:

BACKGROUND: New mechanical classification of femoral fractures breakthroughs the previous simple muscle stretch classification. It can provide further research direction for the internal fixation in mechanics.
OBJECTIVE: To discuss the stress distribution of the femur under different states.
METHODS: Three-dimensional reconstruction of the femurs was performed by the finite element method. The different parts of the femur were constrained and their stress distributions were analyzed to simulate the concentrations of stresses under different states and to provide advices for clinical internal fixation of femoral fractures.
RESULTS AND CONCLUSION: Stress was concentrated at the middle femur under the condition of walking upright, and a spiral stress concentration area was at the lower femur. Under kneeling position, the stress was increased at the inferior segment of the femur, especially at the condyle. Under sitting position, the stress was mainly concentrated at the femur neck. Stresses are concentrated at different segments of the femur under different states, thus leading to different types of femoral fractures. The results provide scientific basis for internal fixation to reduce stress and prevent fixation failure.

中图分类号: