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  本文選題：腰椎　切入點(diǎn)：椎間融合器　出處：《吉林大學(xué)學(xué)報(醫(yī)學(xué)版)》2016年03期 　論文類型：期刊論文

【摘要】：目的:建立可膨脹椎間融合器(EVIFC)和第4、5腰椎的有限元模型,分析EVIFC植入對腰椎生物力學(xué)的影響,為EVIFC的臨床應(yīng)用提供依據(jù)。方法:根據(jù)健康成年男性腰椎CT掃描數(shù)據(jù)建立正常第4、5腰椎有限元模型,在此模型上模擬腰4-5椎間盤輕度退變,在三維模型上植入EVIFC。在屈伸、側(cè)彎和旋轉(zhuǎn)的載荷下,分析腰椎模型置入EVIFC前后的穩(wěn)定性、椎間盤壓力、終板壓力及小關(guān)節(jié)載荷變化。結(jié)果:EVIFC的置入減少了退變節(jié)段終板、髓核和小關(guān)節(jié)的應(yīng)力。屈伸時,腰4-5椎體退變模型的終板及髓核平均壓力分別是6.162 0和0.201 6 MPa,小關(guān)節(jié)載荷是32.8N;植入EVIFC后其數(shù)值分別是3.526、0.107 MPa和8.5N。側(cè)彎及旋轉(zhuǎn)載荷結(jié)果一致。對于鄰近的腰椎節(jié)段,與退變模型比較,植入EVIFC后,腰4-5終板和髓核應(yīng)力值均有所減小,但其相鄰節(jié)段纖維環(huán)的應(yīng)力值均有所增加。結(jié)論:EVIFC對退變腰椎能起到良好的穩(wěn)定效果,可滿足人體生物力學(xué)需求,是一種適宜的新型腰椎融合器。
[Abstract]:Objective: to establish a finite element model of the expandable interbody fusion cage (EVIFC) and the 5th lumbar vertebra, and to analyze the effect of EVIFC implantation on the biomechanics of the lumbar vertebrae. Methods: according to the CT scan data of adult male lumbar vertebrae, the finite element model of the 4th lumbar vertebra was established. The model was used to simulate the mild degeneration of 4-5 lumbar intervertebral disc, and the EVIFCwas implanted into the three-dimensional model. The stability, intervertebral disc pressure, end-plate pressure and facet load of lumbar vertebrae model before and after EVIFC implantation were analyzed under lateral bending and rotating loads. Results the stress of retrograde end plate, nucleus pulposus and facet joint was reduced by the placement of VIFC. The mean pressure of the end plate and nucleus pulposus of the 4-5 lumbar degenerative model was 6.162 0 and 0.201 6 MPa, respectively, and the facet joint load was 32.8N. after EVIFC implantation, the values of the end plate and nucleus pulposus were 3.5260.107 MPa and 8.5 N. the results of lateral bending and rotation were the same. Compared with the degenerative model, the stress values of the lumbar 4-5 endplate and nucleus pulposus decreased after implantation of EVIFC, but the stress values of the adjacent segments of the annulus increased. It can meet the biomechanical requirements of human body and is a new type of lumbar fusion cage.
【作者單位】： 吉林醫(yī)藥學(xué)院附屬醫(yī)院骨一科;
【基金】：吉林省教育廳“十二五”科學(xué)技術(shù)研究項(xiàng)目資助課題(吉教科合字[2012]第332號) 吉林省衛(wèi)生廳科研項(xiàng)目資助課題(2011ZC024)
【分類號】：R681.5;R318.01

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本文編號：1591757