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[1]鄧真,王輝昊,王寬,等.C2～T1三維有限元模型的建立和驗(yàn)證[J].中醫(yī)正骨,2016,28(10):1-6.
　DENG Zhen,WANG Huihao,WANG Kuan,et al.Establishment and verification of three-dimensional finite element model of C2-T1 vertebrae[J].The Journal of Traditional Chinese Orthopedics and Traumatology,2016,28(10):1-6.
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C2～T1三維有限元模型的建立和驗(yàn)證()
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《中醫(yī)正骨》[ISSN:1001-6015/CN:41-1162/R]

卷:
第28卷
期數(shù):
2016年10期
頁碼:
1-6
欄目:
基礎(chǔ)研究
出版日期:
2016-10-20

文章信息/Info

Title:
Establishment and verification of three-dimensional finite element model of C2-T1 vertebrae
作者:
鄧真; 王輝昊; 王寬; 蘭天鷹; 牛文鑫; 詹紅生
上海中醫(yī)藥大學(xué)附屬曙光醫(yī)院,上海 201203
Author(s):
DENG Zhen; WANG Huihao; WANG Kuan; LAN Tianying; NIU Wenxin; ZHAN Hongsheng
Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine,Shanghai 201203,China
關(guān)鍵詞:
頸椎;  有限元分析;  活動度;  應(yīng)力分布
Keywords:
cervical vertebrae;  finite element analysis;  range of motion;  stress distribution
摘要:
目的:建立人體C2～T1三維有限元模型并進(jìn)行驗(yàn)證。方法:采集1位健康男性志愿者的頸部CT圖像,依次采用Mimics 17.0醫(yī)學(xué)圖像處理軟件、Geomagic 12.0逆向工程軟件及Abaqus 6.13有限元分析軟件建立C2～T1三維有限元模型。約束T1下終板所有節(jié)點(diǎn)的全部6個自由度作為邊界條件,在齒狀突頂點(diǎn)上2 mm處建立參考點(diǎn),將其與C2齒狀突所有單元節(jié)點(diǎn)耦合。對參考點(diǎn)分別施加±0.5 Nm、±1 Nm、±1.5 Nm、±2 Nm扭矩,模擬頸椎前屈、后伸、左右旋轉(zhuǎn)、左右側(cè)彎6種運(yùn)動狀態(tài),計(jì)算不同條件下頸椎各節(jié)段活動度,與以往離體實(shí)驗(yàn)和有限元實(shí)驗(yàn)結(jié)果進(jìn)行比較,同時觀察各種運(yùn)動狀態(tài)下模型的應(yīng)力分布情況。結(jié)果:建立的三維有限元模型模擬了C2～T1共7個椎體、6個椎間盤、5種韌帶、6組關(guān)節(jié)軟骨及上下終板,涉及60 459個單元、128 473個節(jié)點(diǎn)。模型在前屈、后伸、左右旋轉(zhuǎn)、左右側(cè)彎6種狀態(tài)下的活動度與文獻(xiàn)中的研究數(shù)據(jù)基本一致,應(yīng)力分布與正常頸椎活動時的情況一致。結(jié)論:本研究建立的C2～T1三維有限元模型較為真實(shí)地模擬了正常頸椎的幾何形態(tài)和材料屬性,能夠較為準(zhǔn)確地反映正常頸椎的生物力學(xué)特性。
Abstract:
Objective:To build and validate a three-dimensional finite element(FE)model of human C2-T1 vertebrae.Methods:The neck CT image of one healthy male volunteer was collected,then the C2-T1 three-dimensional FE model was built by using Mimics 17.0 medical image processing software,Geomagic 12.0 reverse engineering software and Abaqus 6.13 finite element analysis software in turn.Six degrees of freedom of all nodes in inferior endplate of T1 vertebrae were restrained and it was used as boundary condition.The reference point was built at 2 mm above the culminated point of odontoid process and was coupled with all unit nodes of C2 odontoid process.The torques(+/-0.5,+/-1,+/-1.5,and +/-2 Nm,respectively)were applied to the reference point to simulate 6 kinds of motion of cervical vertebra,included anteflexion,backward extension,left-right rotation and left-right lateral flexion.The range of motion(ROM)of each segment of cervical vertebrae in different states of motion were calculated,and then the results were compared with those results of previous in vitro experiment and finite element experiment.Meanwhile,the stress distribution of the model in each state of motion was observed.Results:Seven vertebraes,six intervertebral disks,five kinds of ligaments and six groups of articular cartilage and endplates of C2-T1 were simulated by the three-dimensional FE model,which included 60 459 units and 128 473 nodes.The ROM of the model in 6 kinds of states of motion,including anteflexion,backward extension,left-right rotation and left-right lateral flexion,were basically consistent with the literature data.The stress distribution of the model was consistent with that of cervical spine in normal activities.Conclusion:The three dimensional FE model of C2-T1 vertebrae that we build in this study can literally simulate the geometric configuration and material attribute of normal cervical vertebrae and accurately reflect the biomechanical characteristics of normal cervical vertebrae.

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備注/Memo

備注/Memo:
基金項(xiàng)目:國家自然科學(xué)基金項(xiàng)目(81473702,81503596); “中醫(yī)骨傷科學(xué)”國家重點(diǎn)學(xué)科項(xiàng)目(100508); 上海市中醫(yī)藥領(lǐng)軍人才建設(shè)項(xiàng)目(2012-63-15); 上海領(lǐng)軍人才項(xiàng)目(041); “海派中醫(yī)流派傳承研究基地”項(xiàng)目(ZYSNXD-CC-HPGC-JD-001,ZY3-CCCX-1-1003); 上海市中醫(yī)藥事業(yè)發(fā)展三年行動計(jì)劃項(xiàng)目(ZYSNXD-CC-ZDYJ047)
通訊作者:詹紅生 E-mail:[email protected]
更新日期/Last Update: 2016-10-20