【摘要】 背景:在创伤骨科方面,三维有限元分析不仅仅作为骨折内固定治疗过程中生物力学评估和内固定器材设计、优化的常规手段,近年来也为创伤骨科基础与临床研究开拓新的方向。目的:对足部正常骨骼、扁平足、马蹄足、足部骨折病例进行三维建模及生物力学分析。方法:选取健康受试者以及扁平足、马蹄足、足部骨折患者进行足部CT检查,根据检查数据利用计算机三维成像技术进行三维有限元建模及生物力学分析,根据分析结果得到足部健康骨骼、扁平足、马蹄足及足部骨折应力分布图以及应力值等数据,并对数据结果进行分析。该研究获得福建医科大学附属闽东医院伦理批准。结果与结论:建立足部正常骨骼、扁平足、马蹄足、足部骨折模型并进行生物力学分析,扁平足患者跖骨、跗骨应力值较正常明显增加,马蹄内翻足的应力主要集中于踝关节周围,尤其是在距骨关节面。单纯跖骨骨折对于足跗骨区域应力变化影响较小,Lisfranc损伤患者的足跗骨区应力较正常足部增加较明显。该研究以足部三维有限元建模和生物力学分析将计算机技术与临床实际相结合,为人体足部生物力学研究提供参考,通过应力分析将多种足部情况的力学信息数值化,为足部的临床治疗提供了重要的力学依据。更多还原

【Abstract】 BACKGROUND:In the field of trauma orthopedics,three-dimensional finite element analysis is only a routine means of biomechanical evaluation and internal fixator design and optimization in the treatment of internal fixation of fractures,but also provides new directions for the basic and clinical researches of trauma orthopedics.OBJECTIVE:To establish a three-dimensional finite element model of normal foot,flatfoot,equinus,and foot fracture and to undergo biomechanical analysis.METHODS:One healthy volunteer and patients with flatfoot,equinus,and foot fracture were selected.Their feet were scanned by CT.Three-dimensional finite element modeling and biomechanical analysis were performed by using computer three-dimensional imaging technology according to the CT data.The stress distribution and stress values of each model were then obtained for comparative analysis.The study was approved by the Ethics Committee of Mindong Hospital Affiliated to Fujian Medical University.RESULTS AND CONCLUSION:The three-dimensional finite element models of normal foot,flatfoot,equinus,and foot fracture were established and biomechanical analysis was performed.In the patients with flatfoot,the stress values of the metatarsus and tarsus were significantly increased compared with the normal values.The stress of the equinus was mainly concentrated around the ankle joint,especially on the talus surface.The simple metatarsus fracture had little effect on the stress changes in the tarsus area.The stress in the tarsus area of the Lisfranc injured patients was increased more obviously than in the normal feet.In this study,the three-dimensional finite element modeling and biomechanical analysis of the foot combines computer technology with clinical practice,which provides reference for biomechanical research of human foot.The numericalization of the mechanical data of different foot conditions by mechanical analysis provides important mechanical basis for the clinical treatment of the foot.更多还原