摘要
为解决难以在体内生理载荷条件下评估植入物力学性能的问题,建立了个体化骨肌多体动力学联合有限元建模方法,在个体抬高运动体内载荷状况下调查肩胛骨骨折板的设计和生物力学性能。以一例个体的相关数据为材料,基于骨肌多体动力学软件Anybody和有限元软件Abaqus,建立与个体上肢相对应的骨肌多体动力学模型和肩胛骨骨折固定有限元模型,模拟右臂外展90°和前屈45°运动;采用骨肌多体动力学方法,预测个体体内所有的肌肉力和关节力,然后将预测的肌肉力和关节力加载至肩胛骨骨折固定有限元模型,调查新设计骨折板的生物力学性能,并与传统重建板进行了对比。结果表明:在右臂外展和前屈运动中,最大盂肱关节接触力分别为428 N和379 N;2.6 mm厚度新设计骨折板的最大范氏应力分别为118 MPa和113 MPa,均小于3 mm厚度重建板的最大范氏应力128 MPa和142 MPa。与传统的植入物失效评估方法相比,个体化联合建模方法增加考虑了个体的解剖差异和体内生理载荷状况,允许在个体日常活动体内载荷下调查植入物的生物力学性能,可为假体设计、医生手术和术后康复提供理论指导。
A combined method of customized musculoskeletal multi-body dynamics (MBD) and finite element (FE) modelling is proposed to overcome the difficulties for evaluating the failure of implant under in vivo physiological loading conditions.Following the related data from an adult male,the subject-specific upper extremity musculoskeletal MBD model and the corresponding scapular fracture fixation FE model are established to simulate arm abduction and forward flexion movements with the musculoskeletal MBD software AnyBody and the FE software Abaqus.The glenohumeral joint forces and all muscle forces calculated by the MBD analysis are applied to the FE model,and von Mises stresses are obtained to investigate the validity of the new-designed locking plate compared with the traditional reconstruction plate under in vivo physiological loading conditions.The maximum glenohumeral joint forces reach 428 N and 379 N observed at 90° of abduction and 45° of flexion respectively.The corresponding maximum Von Mises stresses of the 2.6 mm thickness new-designed plate with values of 118 MPa and 113 MPa,are lower than those of the 3 mm thickness traditional reconstruction plate with values of 128 MPa and 142 MPa.The combined method of musculoskeletal MBD and FE modelling allows to consider subject-specific anatomical differences and provide in vivo loading conditions for biomechanical investigation of implants,which contributes to improve prosthetic design,surgical operation and postoperative recovery.
作者
范勋健
陈瑱贤
曹卓
夏志辉
陈军
靳忠民
FAN Xunjian;CHEN Zhenxian;CAO Zhuo;XIA Zhihui;CHEN Jun;JIN Zhongmin(Institute of Mechanical Manufacturing Technology,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China;State Key Laboratory for Manufacturing Systems Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Key Laboratory of Road Construction Technology and Equipment,Chang’an University,Xi’an 710064,China;Department of Orthopedics,the Second Affiliated Hospital of Medical University of the Air Force,Xi’an 710038,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2019年第7期168-176,共9页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(51508031,51775460)
中央高校基本科研业务费专项基金资助项目(310825173702)
关键词
个体化
肩胛骨锁定板
体内载荷
骨肌多体动力学
有限元
生物力学
subject-specific
scapular locking plate
in vivo loading
musculoskeletal multi-body dynamics
finite element
biomechanics
