本文選題：膝關(guān)節(jié)　切入點(diǎn)：假體設(shè)計(jì)　出處：《航天醫(yī)學(xué)與醫(yī)學(xué)工程》2017年01期 　論文類型：期刊論文

【摘要】：目的研究膝關(guān)節(jié)假體形面輪廓對(duì)假體關(guān)節(jié)面間接觸應(yīng)力的影響。方法基于MRI(magnetic resonance imaging)圖像采集建立多角度正常膝關(guān)節(jié)模型。依據(jù)自然膝關(guān)節(jié)的解剖結(jié)構(gòu),從中提取出個(gè)體膝的結(jié)構(gòu)尺寸及形面特征,設(shè)計(jì)出漸變形面的膝關(guān)節(jié)假體,按照全膝關(guān)節(jié)置換手術(shù)的規(guī)范流程建立植入漸變形面假體后的全膝三維模型,并通過有限元分析,比較植入假體后對(duì)股骨/脛骨關(guān)節(jié)面等效應(yīng)力的影響。結(jié)果植入漸變形面的假體膝在屈曲角度0°~60°時(shí)對(duì)于髁面的應(yīng)力分布影響不大,但大于60°,尤其是80°時(shí),應(yīng)力分布變化明顯;另外,對(duì)內(nèi)/外側(cè)髁面的最大等效應(yīng)力有較大的改變。結(jié)論在膝關(guān)節(jié)假體的設(shè)計(jì)建模中,盡量重現(xiàn)人體關(guān)節(jié)構(gòu)造,益于保證置換后整個(gè)膝關(guān)節(jié)的協(xié)調(diào)運(yùn)作。整個(gè)設(shè)計(jì)過程及方法對(duì)于完善和改進(jìn)假體的設(shè)計(jì)具有重要的參考意義。
[Abstract]:Objective to study the knee prosthesis surface contact stress contour of the prosthesis articular surface. Based on the method of MRI (magnetic resonance imaging) image acquisition and the establishment of multi angle normal knee model. According to the anatomic structure of knee joint, extract the characteristics of individual knee structure size and shape in design gradient shape the knee joint prosthesis, the establishment of three-dimensional model of total knee prosthesis implantation gradient shape according to the standard process of total knee replacement surgery, and through the finite element analysis, effects of implant prosthesis after femoral / tibial articular surface stress. The gradient surface implanted prosthetic knee flexion angle in 0 DEG ~60 DEG for the condyle stress distribution has little effect, but more than 60 degrees, especially at 80 degrees, the stress distribution changed significantly; in addition, there are great changes on the internal / external condyle of the maximum equivalent stress. Conclusion in knee joint prosthesis In the design modeling, we try to reproduce human joint structure as much as possible, so as to ensure the coordinated operation of the whole knee after replacement. The whole design process and method is of great reference value for improving and improving the design of prosthesis.

【作者單位】： 北京航空航天大學(xué)機(jī)械工程及自動(dòng)化學(xué)院;
【基金】：北京航空航天大學(xué)研究生教育與發(fā)展研究專項(xiàng)基金(4301019)
【分類號(hào)】：R687.4;R318.17

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