肘关节后囊损伤后愈合不同阶段的生物力学  

Different Healing Stages after Elbow Posterior Capsule Injury:A Biomechanical Study

作　　者：王芳[1,2] 田博天[1] 李明新 胡军[1,2] 周鸣泽[1] WANG Fang;TIAN Botian;LI Mingxin;HU Jun;ZHOU Mingze(College of Mechanical Engineering,Tianjin University of Science and Technology,Tianjin 300222,China;Tianjin Key Laboratory of Light Industry and Food Engineering Machinery Equipment Integrated Design and Online Monitoring,Tianjin University of Science and Technology,Tianjin 300222,China;Department of Orthopedics,Tianjin Hospital,Tianjin 300211,China)

机构地区：[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 [3]天津市天津医院骨外科,天津300211

出　　处：《医用生物力学》2024年第5期889-895,共7页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(12102301)。

摘　　要：目的评估关节后囊损伤愈合过程中不同阶段,肘关节内部软组织的力学行为。方法建立考虑肌肉主动行为的肘关节有限元模型,模拟肘关节在无损伤和关节后囊损伤后2、4、6、8周时屈曲运动,分析关节囊、尺骨软骨和韧带von Mises等效应力变化。结果无损伤以及损伤后2、4、6、8周时,关节囊在肘关节屈曲60°时应力分别为8.23、7.87、8.27、8.99、10.5 MPa。在肘关节屈曲30°时,与无损伤相比,损伤后2、4、6、8周时尺骨软骨应力分别为增加13.0%、28.3%、41.3%和45.7%。与损伤后2周相比,损伤后4周时桡侧副韧带在屈曲15°、30°、45°、60°、75°时应力分别减少12.5%、22.2%、13.6%、3.2%和10.6%。结论肘关节后囊损伤愈合过程中,骨与软组织生物力学特征变化显著。研究结果可为关节囊挛缩的预防和治疗以及康复辅具的开发提供理论依据。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.

关 键 词：肘关节 关节囊挛缩 屈曲运动 数值模拟 

分 类 号：R318.01[医药卫生—生物医学工程]