Influencing Factors of Femoro-Tibial Contact Area for Knee Prostheses
10.16156/j.1004-7220.2019.06.05
- VernacularTitle:膝关节假体股胫接触面积的影响因素
- Author:
Xiaohong WANG
1
;
Dayong SONG
2
;
Xiang DONG
2
;
Jian WANG
2
;
Lei JIANG
2
;
Baozhang ZHU
2
;
Chengkung CHENG
3
Author Information
1. School of Biological Science and Medical Engineering, Beihang University；Beijing Medical Implant Engineering Research Center, Beijing Naton Technology Group Co., Ltd.；Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co., Ltd.
2. Beijing Medical Implant Engineering Research Center, Beijing Naton Technology Group Co., Ltd.；Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co., Ltd.
3. School of Biological Science and Medical Engineering, Beihang University； Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University
- Publication Type:Journal Article
- Keywords:
femoro-tibial contact area;
automatic modeling;
finite element analysis;
femoral sagittal radius;
tibial sagittal radius
- From:
Journal of Medical Biomechanics
2019;34(6):E594-E600
- CountryChina
- Language:Chinese
-
Abstract:
Objective By developing an automatic procedure for optimization of femoro-tibial contact area for knee prosthesis, to summarize the influence pattern of design parameters on contact area, and discover the relationship between the maximum contact stress and contact area. Methods A parametric finite element (FE) model was developed in the Isight software, which included three components: automatic parameter changes for the geometric model, automatic modeling in the FE software, and automatic FE calculation. The automatic workflow was realized, and then contact areas were statistically analyzed. Results The FE model was validated by using Tekscan pressure distribution system. When the femoral sagittal radius was gradually close to the tibial sagittal radius, the contact area gradually reached to the maximum 295 mm2. The femoral sagittal radius had a positive effect on contact area, while the tibial sagittal radius had a negative effect. The maximum contact stress had a linear relationship with contact area approximately. Conclusions This study analyzed the influence of femoro-tibial sagittal radius on contact stress and contact area, and the research findings would provide references for the design on reducing wear of tibial insert in clinic.
