Biomechanical Study on Personalized Titanium Alloy Short Femoral Prosthesis
10.16156/j.1004-7220.2021.03.10
- VernacularTitle:个性化钛合金短柄股骨假体的生物力学研究
- Author:
Hongwei LIU
1
;
Wen ZHANG
2
;
Junfeng JIANG
3
;
Yiping WENG
1
;
Nanwei XU
4
;
Yunkun ZHANG
5
;
Caimei WANG
6
Author Information
1. Department of Orthopaedics, Changzhou No.2 People’s Hospital Affiliated to Nanjing Medical University
2. Orthopedic Institute, Soochow University
3. College of Internet of Things Engineering, Hohai University
4. Department of Orthopaedics, Changzhou No.3 People’s Hospital Affiliated to Nanjing Medical University
5. Department of Orthopaedics, Changzhou No.4 People’s Hospital Affiliated to Nanjing Medical University
6. Beijing AK Medical Co., Ltd.
- Publication Type:Journal Article
- Keywords:
femoral prosthesis;
personalized stem;
stress shielding;
finite element analysis;
biomechanics
- From:
Journal of Medical Biomechanics
2021;36(3):E359-E364
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate biomechanical properties of the personalized titanium alloy short femoral prosthesis by finite element analysis. Methods Based on the validated femoral finite element model, the base of the femoral neck was simulated, and by inserting different short femoral prostheses, four total hip replacement (THR) models, namely, the SMF stem model (Model A), BE1 stem model (Model B), MINI stem model (Model C) and personalized stem model (Model D) were established, respectively. The same loads and constraints were applied to four groups of models, and the von Mises stress distribution and deformation were calculated and analyzed, so as to compare mechanical stability of each model. Results The deformation of all THR models was smaller than that of the femur model under physiological state. The deformation of Model B was close to that of Model C, and the deformation of Model A was close to that of Model D. The peak stress of Model C was higher than that of the other 3 models, reaching 9555 MPa. The overall stress trend was Model C > Model B > Model D> Model A > Model under physiological state. Conclusions The peak stress, stress distribution of personalized short femoral stem were similar to that of SMF stem, with reasonable stress distribution, small stress shielding of the proximal femur, minimum overall deformation and shear stress of the prosthesis, and its effectiveness and stability could meet the requirements of human biomechanics, which could provide references for joint surgeons and prosthesis researchers.
