發(fā)布時(shí)間：2018-11-03 17:28

【摘要】：目的分析人體正常膝關(guān)節(jié)和人工膝關(guān)節(jié)高屈曲活動(dòng)下股脛關(guān)節(jié)的運(yùn)動(dòng),為膝關(guān)節(jié)運(yùn)動(dòng)特性研究、假體設(shè)計(jì)提供參考。方法選取健康志愿者,利用CT和MRI掃描數(shù)據(jù)建立正常全膝關(guān)節(jié)三維有限元模型以及TKA術(shù)后有限元模型,采取三束股四頭肌肌力非同步變力加載,模擬人體下蹲運(yùn)動(dòng),以分析股脛關(guān)節(jié)的相對(duì)運(yùn)動(dòng)特性,并檢索相關(guān)研究結(jié)果以便對(duì)比分析。結(jié)果獲得正常膝關(guān)節(jié)以及TKA術(shù)后人體下蹲過(guò)程中股骨相對(duì)脛骨的三維相對(duì)運(yùn)動(dòng)數(shù)據(jù),結(jié)果表明,TKA術(shù)前、后股脛關(guān)節(jié)相對(duì)運(yùn)動(dòng)的總體趨勢(shì)相近,同時(shí)在前后位移、遠(yuǎn)近位移、內(nèi)外位移、內(nèi)收外展和內(nèi)外旋等最大值方面存在差異;同時(shí)通過(guò)對(duì)比分析TKA前后股脛關(guān)節(jié)相對(duì)運(yùn)動(dòng)以及相關(guān)文獻(xiàn)數(shù)據(jù),發(fā)現(xiàn)結(jié)果存在不同程度差異。結(jié)論究其原因,正常膝關(guān)節(jié)相對(duì)運(yùn)動(dòng)差異主要在于股脛關(guān)節(jié)各個(gè)運(yùn)動(dòng)方向上和不同屈曲度時(shí)約束程度的改變;人工膝關(guān)節(jié)相對(duì)運(yùn)動(dòng)差異主要來(lái)源于膝關(guān)節(jié)型面和結(jié)構(gòu)的改變;同時(shí)與坐標(biāo)系的定義、在體和離體的差異、負(fù)荷加載的差異相關(guān)。本研究針對(duì)人體正常膝關(guān)節(jié)和TKA術(shù)后膝關(guān)節(jié)股脛關(guān)節(jié)運(yùn)動(dòng)進(jìn)行有限元仿真分析,對(duì)膝關(guān)節(jié)運(yùn)動(dòng)特性研究具有一定的參考價(jià)值。
[Abstract]:Objective to analyze the motion of femoral tibial joint under high flexion of human knee joint and artificial knee joint, and to provide reference for the study of knee joint motion characteristics and prosthesis design. Methods three dimensional finite element model of normal total knee joint and finite element model after TKA were established by using CT and MRI scanning data of healthy volunteers. Three bundle quadriceps muscle force was loaded asynchronously to simulate human squat motion. To analyze the relative motion characteristics of tibial joint, and search the related results for comparative analysis. Results three dimensional relative motion data of femur relative to tibia were obtained during squatting of normal knee joint and human body after TKA. The results showed that the general trend of relative motion of posterior femur tibial joint before TKA was similar, and the relative movement of posterior femur tibial joint was similar in front and back displacement, far and near displacement at the same time. There are differences in the maximum values of internal and external displacement, internal and external abduction and internal and external rotation. At the same time, the relative motion of tibial joint before and after TKA and related literature data were analyzed, and the results were found to be different in different degrees. Conclusion the difference of relative motion of normal knee joint is mainly due to the change of constraint degree in different movement direction and different flexion of femoral tibial joint, and the difference of relative motion of artificial knee joint mainly comes from the change of shape and structure of knee joint. At the same time, it is related to the definition of coordinate system, the difference between in vivo and in vitro, and the difference of load loading. In this study, finite element simulation analysis of knee joint motion after TKA and normal knee joint is carried out, which has a certain reference value for the study of knee joint motion characteristics.
【作者單位】： 河南理工大學(xué)機(jī)械與動(dòng)力工程學(xué)院;河南理工大學(xué)醫(yī)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(C100309)
【分類號(hào)】：R684

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