摘要
[目的]构建轻度OA膝关节的有限元解剖模型,并用于研究在OA膝关节关节软骨和半月板上的应力分布特征。[方法]基于MRI和CT影像数据构建具有骨性结构和非骨性结构的轻度OA膝关节有限元解剖模型,定义材料属性并确定边界条件和轴向载荷,以胫股关节间软骨接触的Mises应力和接触压强为研究指标,分析关节内的应力分布特征。[结果]构建了轻度OA膝关节三维有限元解剖模型,有限元分析结果表明内侧胫骨近端关节软骨接触压强大于外侧室,外侧半月板接触压强峰值大于内侧室;股骨远端与胫骨近端关节软骨边缘处Mises应力峰值大于胫股关节间软骨接触部分,外侧半月板最大Mises应力位于半月板中部,而内侧半月板最大Mises应力位于半月板后部。[结论] OA膝关节内应力分布特征不同于正常膝关节,内侧半月板半脱位和关节软骨退变的特征促进了膝OA的进一步发展。
[Objective] A finite element anatomical model of the mild OA knee joint was constructed and used to study the stress distribution characteristics of the OA knee joint cartilage and meniscus. [Method] Based on MRI and CT image data, a finite element anatomical model of mild OA knee joint with bony and non-bone structures was constructed. The material properties were defined and the boundary conditions and axial loads were determined. The Mises stress of the cartilage contact between the tibiofemoral joints was determined. In addition, the contact pressure and the stress distribution characteristics in the joint were analyzed. [Results] A three-dimensional finite element anatomical model of the mild OA knee joint was constructed.As results of finite element analysis, the contact pressure on proximal medial tibial articular cartilage was greater than that on the lateral compartment, whereas the contact pressure peak on lateral meniscus was greater than that on the medial compartment. The Mises stress on distal femur and the proximal tibial articular cartilage edge was greater than that on the contact aera of tibiofemoral articulation. In term of meniscus bearing, the maximal Mises stress proved on the middle part of the lateral meniscus, whereas the posterior part of the medial meniscus. [Conclusion] The stress distribution characteristics of mild OA knee are different from those of normal knee joints. The subluxation of medial meniscus and articular cartilage degeneration promote the further development of knee OA.
作者
张震
董跃福
苏宏飞
陈秋平
何伟
李鹏飞
董万鹏
ZHANG Zhen;DONG Yue-fu;SU Hong-fei;CHEN Qiu-ping;HE Wei;LI Peng-fei;DONG Wan-peng(School of Materials Engineering,Shanghai University of Engineering and Technology,Shanghai 201620,China;Department of Joint Surgery,Lianyungang Hospital,Xuzhou Medical University,Lianyungang 222061,China)
出处
《中国矫形外科杂志》
CAS
CSCD
北大核心
2020年第5期439-443,共5页
Orthopedic Journal of China
基金
国家自然科学基金项目(编号:31670956)
克拉玛依市科技重大专项项目(编号:2018ZD002B)
科技援疆计划项目(编号:2019E0235)。
关键词
膝骨关节炎
有限元分析
解剖模型
knee osteoarthritis
finite element analysis
anatomical model
