【摘要】：背景:目前雖然膝關(guān)節(jié)半月板三維有限元生物力學(xué)分析的研究已有報(bào)道,對(duì)半月板的生物力學(xué)變化過程有了一定的認(rèn)識(shí),但動(dòng)態(tài)仿真模擬在同一載荷條件下屈曲過程中膝關(guān)節(jié)半月板生物力學(xué)分析的報(bào)道較少。目的:應(yīng)用有限元法動(dòng)態(tài)仿真模擬并分析不同屈曲角度下膝關(guān)節(jié)半月板的生物力學(xué)特性。方法:基于正常成人志愿者膝關(guān)節(jié)MRI數(shù)據(jù),運(yùn)用醫(yī)學(xué)有限元仿真軟件Mimics 10.01及逆向工程軟件Rapidform XOR3重建全膝關(guān)節(jié)半月板三維有限元模型,并運(yùn)用高級(jí)有限元分析軟件Abaqus 6.10-1仿真模擬分析該模型在承載300 N垂直載荷下屈曲過程中的生物力學(xué)變化。結(jié)果與結(jié)論:(1)膝關(guān)節(jié)屈曲0°,30°,60°,90°時(shí),隨著角度的增加,最大應(yīng)力點(diǎn)從內(nèi)側(cè)半月板后角脛骨附著面前緣移動(dòng)到外側(cè)半月板前角脛骨附著面后緣,且外側(cè)半月板應(yīng)力范圍大于內(nèi)側(cè)半月板;(2)膝關(guān)節(jié)屈曲0°,30°,60°,90°時(shí),隨著角度的增加,最大位移點(diǎn)從接近內(nèi)側(cè)半月板內(nèi)緣中點(diǎn)的地方移動(dòng)到外側(cè)半月板前外上緣,且外側(cè)半月板的位移范圍較內(nèi)側(cè)半月板位移大;(3)結(jié)果提示,半月板是膝關(guān)節(jié)屈曲過程中主要的承重結(jié)構(gòu),運(yùn)動(dòng)過程中外側(cè)半月板的損傷率大于內(nèi)側(cè)半月板,與此處應(yīng)力及位移較大有關(guān)。
[Abstract]:Background: although the research of three-dimensional finite element biomechanical analysis of meniscus of knee joint has been reported, there is a certain understanding of the process of biomechanical change of meniscus. However, there are few reports on biomechanical analysis of knee meniscus in the process of buckling under the same load. Aim: to simulate and analyze the biomechanical characteristics of knee meniscus with different flexion angles by finite element method (FEM). Methods: based on the MRI data of knee joint of normal adult volunteers, the three dimensional finite element model of meniscus of total knee joint was reconstructed by medical finite element simulation software Mimics 10.01 and reverse engineering software Rapidform XOR3. The biomechanical changes of the model under 300N vertical load are analyzed by using the advanced finite element analysis software Abaqus 6.10-1. Results and conclusion: (1) with the increase of angle, the maximum stress point moved from the anterior edge of the tibial attachment to the posterior edge of the anterior angle of the lateral meniscus when the flexion of the knee joint was 0 擄~ 30 擄~ 60 擄~ 90 擄, and the maximum stress point moved from the anterior angle of the medial meniscus to the posterior edge of the tibial attachment. The stress range of lateral meniscus was larger than that of medial meniscus. (2) with the increase of angle, the maximum displacement point of lateral meniscus moved from the point near the middle point of medial meniscus to the anterior and upper edge of lateral meniscus when the flexion of knee joint was 0 擄~ 30 擄~ 60 擄~ 90 擄. The displacement range of lateral meniscus is larger than that of medial meniscus. (3) the results suggest that meniscus is the main load-bearing structure in the flexion of knee joint, and the damage rate of lateral meniscus during exercise is greater than that of medial meniscus. It is related to the greater stress and displacement here.
【作者單位】： 昆明醫(yī)科大學(xué)第一附屬醫(yī)院麻醉科;常州市第四人民醫(yī)院骨科;
【基金】：常州市科技局應(yīng)用基礎(chǔ)研究計(jì)劃項(xiàng)目(CJ20130049)~~
【分類號(hào)】：R684;R318.01

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