Effects from Extramedullary Design of Femoral Stem on Hip Contact Force: A Musculoskeletal Multi-Body Dynamic Study
10.16156/j.1004-7220.2023.01.13
- VernacularTitle:股骨柄髓外设计对髋关节接触力影响的骨肌多体动力学研究
- Author:
Zhiwei ZHANG
1
;
Zhifeng ZHANG
2
;
Zhenxian CHEN
3
;
Caime WANG
4
;
Zhongmin JIN
5
Author Information
1. International Machinery Center, Xi’an Jiaotong University
2. Joint Surgery Center,the Second Affiliated Hospital of Inner Mongolia Medical University
3. School of Mechanical Engineering, Chang’an University
4. Beijing AK Medical Co. , Ltd.
5. International Machinery Center, Xi’an Jiaotong University; School of Mechanical Engineering, Southwest Jiaotong University
- Publication Type:Journal Article
- Keywords:
total hip arthroplasty ( THA);
femoral stem extramedullary design;
muscluloskeletal multi-bodydynamics;
hip contact force
- From:
Journal of Medical Biomechanics
2023;38(1):E090-E096
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of design parameters such as neck-shaft angle, femoral offset and anteversion angle of total hip arthroplasty ( THA) prosthesis on contact forces of the hip. Methods A musculoskeletal multi-body dynamic model of THA was established based on AnyBody software. The effects of single or multiple factors on hip contact force were studied when the neck-shaft angle, eccentricity and anteversion angle varied within ±10°, ±20 mm and ±10°, respectively. Results The maximum hip contact force increased by 26. 08% when femoral offset was reduced by 20 mm. The maximum hip contact force increased by 5. 99% when the neck-shaft angle increased by 10°. When the anteversion angle increased by 10°, the hip contact force decreased at 0% -24% of gait cycle, with the peak decreasing by 19. 16% . However, the hip contact force was significantly increased at 38% -70% of gait cycle, with the peak increasing by 67. 78% . Conclusions In extramedullary design of the femoral stem, based on reconstruction of the patient’s anatomical parameters, the offset of the femoral stem can be appropriately increased, and the neck-shaft angle and anteversion angle can bereduced to avoid increasing forces on the hip.
