摘要
目的研究髋臼解剖几何形态对髋关节接触力学特性的影响。方法建立人体天然髋关节的解剖学模型以及具有不同髋臼外形的简化模型,利用有限元分析方法研究步态载荷作用下髋关节的接触力学行为。结果 (1)解剖学模型产生的接触主要在髋臼的中上部,沿身体前后方向分布,峰值接触应力出现在髋臼前上部。(2)与解剖学模型相比,旋转椭球形髋臼产生了类似的接触分布,而球形和旋转蚶线形髋臼产生的接触主要在髋臼中部,沿上下方向;(3)旋转椭球形髋臼具有最大的接触面积和最小的峰值接触压力和Von-Mises应力;(4)球形髋臼和旋转蚶线形髋臼具有类似的接触力学特征。结论与球形和旋转蚶线形相比,旋转椭球形能够更好地描述髋臼的解剖形态及其接触力学行为。
Objective To investigate the influence of acetabular morphology on contact mechanics of the human hip joint. Methods One anatomical finite element （FE） model of natural hip joint and three simplified FE models with different acetabular geometry were established to study the contact mechanics of hip joint under gait loads. Results （ 1 ） Contact predicted by the anatomical model was mainly distributed in the acetabuiar medial-superior area, from anterior to posterior, with the peak contact pressure occurred in the anterior-superior area; （2） Com- pared with the anatomical model, the rotational ellipsoid produced similar contact behavior, while the sphere and the rotational conchoids predicted that contact was distributed in the medial-lateral direction; （3） The rotational el- lipsoid predicted the largest contact area and the lowest peak contact pressure and Von-Mises stress; （4） The sphere and rotational conchoids had similar contact mechanical behavior. Conclusions Compared with the sphere and rotational conchoids, the rotational ellipsoid could be more preferable to represent the anatomical mor- phology of the acetabulum and its contact mechanics.
出处
《医用生物力学》
EI
CAS
CSCD
北大核心
2012年第3期264-269,共6页
Journal of Medical Biomechanics
基金
国家自然科学基金重大国际合作项目(30810103908)
江苏省普通高校研究生科研创新计划项目(CXZZ11_0287)
江苏高校优势学科建设工程资助项目
关键词
髋臼
解剖形态
有限元分析
力学特性
生物力学
Acetabulum
Anatomical morphology
Finite element analysis
Mechanical properties
Biomechanics
