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。
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.
出处
《中国组织工程研究》
CAS
CSCD
2012年第17期3045-3047,共3页
Chinese Journal of Tissue Engineering Research
