中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (27): 4265-4270.doi: 10.12307/2023.647

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

发育性髋关节发育不良患者不同髋关节外展角度下髋部应力分布的有限元分析

郭苏童,郭  宇,王  凌,丁育健,任天皓,徐海涛,王誉霖,冯德宏   

  1. 南京医科大学附属无锡人民医院骨科,江苏省无锡市   214000
  • 收稿日期:2022-07-06 接受日期:2022-08-24 出版日期:2023-09-28 发布日期:2022-11-07
  • 通讯作者: 冯德宏,主任医师,教授,南京医科大学附属无锡人民医院骨科,江苏省无锡市 214000
  • 作者简介:郭苏童,男,1996年生,江苏省连云港市人,汉族,南京医科大学在读硕士,主要从事关节外科、生物材料与骨组织工程研究。
  • 基金资助:
    无锡市社会发展科技示范(医疗卫生类) 项目(N20192006),项目负责人:冯德宏;无锡市卫生健康委科研项目(重大项目)(Z202010),项目负责人:冯德宏

Finite element analysis of hip stress distribution at different hip abduction angles in patients with developmental dysplasia of the hip

Guo Sutong, Guo Yu, Wang Ling, Ding Yujian, Ren Tianhao, Xu Haitao, Wang Yulin, Feng Dehong   

  1. Department of Orthopedics, Affiliated Wuxi People’s Hospital of Nanjing Medical University, Wuxi 214000, Jiangsu Province, China
  • Received:2022-07-06 Accepted:2022-08-24 Online:2023-09-28 Published:2022-11-07
  • Contact: Feng Dehong, Chief physician, Professor, Department of Orthopedics, Affiliated Wuxi People’s Hospital of Nanjing Medical University, Wuxi 214000, Jiangsu Province, China
  • About author:Guo Sutong, Master candidate, Department of Orthopedics, Affiliated Wuxi People’s Hospital of Nanjing Medical University, Wuxi 214000, Jiangsu Province, China
  • Supported by:
    Wuxi Social Development Science and Technology Demonstration (Medical and Health) Project, No. N20192006 (to FDH); Wuxi Sanitation and Health Commission Scientific Research Project (Major Project), No. Z202010 (to FDH)

摘要:


文题释义:

发育性髋关节发育不良:是由于发育异常导致的以股骨头髋臼覆盖不足、真臼发育浅以及髋臼和股骨过度前倾、关节脱位并形成假臼为主要病理改变的疾病。
应力:物体由于外部原因而发生形变时,物体内各部分之间会产生相互作用的内力,单位面积上的内力称为应力。

背景:目前对于髋关节发育不良的有限元研究相对较少,髋关节外展角度对髋关节生物力学分布的影响也不明确。
目的:应用有限元方法分析不同外展角度下髋关节发育不良患者健侧及患侧的髋关节应力分布,为髋关节发育不良的预防、治疗、康复等提供方案。
方法:选取1例左侧髋关节发育不良患者双侧髋关节CT薄层扫描数据,利用Mimics软件建立髋关节模型,Geomagic Wrap软件完成实体化,Solidworks软件进行皮质骨与松质骨的装配,然后应用Ansys Workbench软件加载关节负荷,分析不同外展角度下单足着地条件下髋关节应力分布情况。
结果与结论:①该研究所建模型与实际情况相符合,随着髋关节外展角度增加,正常髋关节的股骨颈最大应力值逐渐增大,且一直位于股骨颈内侧,当健侧髋关节外展为15°时股骨头最大应力值最小,当髋关节外展20°时髋臼上方最大应力值最小;②发育性髋关节发育不良患者患侧髋最大应力值一直位于髋臼上方,且当髋关节外展为25°时,髋臼最大应力值最小,当髋关节外展20°时,股骨头最大应力值最小,当髋关节外展0°时,股骨颈部最大应力值最小,且位于股骨颈后方,随着髋关节外展角度增大,股骨颈最大应力点逐渐向股骨颈内下侧移动。
https://orcid.org/0000-0001-5582-7249 (郭苏童) 
中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程

关键词: 发育性髋关节发育不良, 髋关节, 髋关节外展, 有限元, 股骨头坏死, 髋关节病

Abstract: BACKGROUND: There are relatively few finite element studies on hip dysplasia, and the influence of the size of hip abduction angle on the biomechanical distribution of the hip joint is not clear.  
OBJECTIVE: To apply the finite element method to analyze the hip joint stress distribution on the healthy side and the affected side of patients with hip dysplasia under different abduction angles, and to provide solutions for the prevention, treatment and rehabilitation of hip dysplasia.
METHODS: A patient with left-sided hip dysplasia was selected from the CT scan data of bilateral hip joints, and the hip joint model was established by Mimics software, solidified by Geomagic Wrap software and assembled with cortical bone and cancellous bone by Solidworks software. The Ansys Workbench software was used to load the joint load, and the stress distribution of the hip joint under the condition of single foot landing under different abduction angles was analyzed.  
RESULTS AND CONCLUSION: (1) The model constructed in this study was consistent with the actual situation. As the hip abduction angle increased, the maximum stress value of the femoral neck in the normal hip part gradually increased and was always located on the medial side of the femoral neck, and the maximum stress value of the femoral head was the smallest when the hip abduction on the healthy side was 15°, and the maximum stress value above the acetabulum was the smallest when the hip abduction was 20°. (2) The maximum stress value in the affected hip of developmental dysplasia of the hip patients was always located above the acetabulum, and the maximum stress value in the acetabulum was minimal when the abduction of the hip was 25°; the maximum stress value in the femoral head was minimal when the hip was abducted at 20°, and the maximum stress value in the femoral neck was minimal when the hip was abducted at 0° and was located posterior to the femoral neck. As the hip abduction angle increased, the maximum stress point in the femoral neck gradually moved towards the medial inferior aspect of the femoral neck.

Key words: developmental dysplasia of the hip, hip joint, hip abduction, finite element, femoral head necrosis, hip arthropathy

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