Static Finite Element Analysis on Hip Disarticulation Prosthesis Socket-Residual Limb in Stance Phase
10.16156/j.1004-7220.2021.06.14
- VernacularTitle:髋离断假肢接受腔-残肢站立期静态有限元分析
- Author:
Yu QIAN
1
;
Xinwei LI
1
;
Bingze HE
1
;
Jing ZHAO
1
;
Hongliu YU
1
Author Information
1. Institute of Rehabilitation Engineering and Technology, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology
- Publication Type:Journal Article
- Keywords:
hip disarticulation;
hip socket;
finite element analysis;
interface stress;
pressure acquisition system
- From:
Journal of Medical Biomechanics
2021;36(6):E923-E928
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study mechanical properties of the interface between hip residual limb and hip socket during the stance phase by using the finite element analysis (FEA) method, so as to provide the theoretical basis for structure optimization and design of hip socket, as well as the research basis for comfort evaluation of hip socket. Methods According to CT scan images of the patient’s residual limb, the model of bone, soft tissues and socket was reconstructed by reverse modeling. The distribution of normal stress and shear stress on the interface between hip residual limb and hip socket was analyzed and a pressure acquisition module system was designed to verify the stress distribution condition. Results The interfacial stress between hip residual limb and hip socket was mainly distributed in the waist and the bottom of the residual limb, and the interfacial stress was more evenly distributed in the rest of the residual limb. The results of finite element calculation were in good agreement with the system measurement results of pressure acquisition module. Conclusions In order to improve force transfer and safety and comfort of the hip socket, it is necessary to fully consider stress condition of the waist and bottom of the residual limb, as well as the coordination degree between residual limb and hip socket.
