Different Healing Stages after Elbow Posterior Capsule Injury:A Biomechanical Study
10.16156/j.1004-7220.2024.05.014
- VernacularTitle:肘关节后囊损伤后愈合不同阶段的生物力学
- Author:
Fang WANG
1
,
2
;
Botian TIAN
;
Mingxin LI
;
Jun HU
;
Mingze ZHOU
Author Information
1. 天津科技大学 机械工程学院,天津 300222
2. 天津科技大学天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津 300222
- Keywords:
elbow joint;
capsule contracture;
flexion;
numerical simulation
- From:
Journal of Medical Biomechanics
2024;39(5):889-895
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the mechanical behavior of the internal soft tissues of the elbow at different healing stages of a posterior capsular injury.Methods A finite element model of the elbow joint considering muscle activation behavior was established to simulate elbow flexion without injury and at the 2nd,4th,6th,and 8th week after posterior capsule injury.The von Mises effective stress variations in the articular capsule,ulnar cartilage,and ligaments were analyzed.Results Without injury and at the 2nd,4th,6th,and 8th week after injury,the stress on the articular capsule at 60° flexion was 8.23,7.87,8.27,8.99,and 10.5 MPa,respectively.When the elbow flexion angle was 30°,the ulnar cartilage stress increased by 13.0%,28.3%,41.3%,and 45.7%at the 2nd,4th,6th,and 8th week after injury,respectively,compared to that without injury.At the 4th week after injury,the stress of the radial collateral ligament at 15°,30°,45°,60°,and 75° flexion was reduced by 12.5%,22.2%,13.6%,3.2%,and 10.6%,respectively,compared to that at the 2nd week.Conclusions During the healing process of elobow posterior capsule injury,the biomechanical characteristics of bone and soft tissues changed significantly.This study provides a theoretical basis for the prevention and treatment of capsular contracture and development of rehabilitation aids.
