CAJ | 학술논문

目的：建立颈椎（ C4－C6）三维有限元模型，研究钩突切除前后对颈椎稳定性的影响。方法根据健康志愿者的颈椎断层CT扫描序列图像，采用Mimics13?1和SolidWorks2012软件进行三维重建和造型，利用ANSYS15?0软件，对颈椎及周围组织赋予不同的材料属性，建立颈椎（ C4－C6）三维有限元模型。在建立的模型上加载，模拟脊柱的前屈、后伸、左右侧曲、左右旋转6种工况下的生理活动，获取位移、应力等数值云图，并进行分析验证。在 C5节段左侧钩突上分别切除钩突高度的25％、50％和60％，获得不同范围钩突切除时的左侧弯状态下颈椎各部位的位移、应力等数值云图，分析不同范围钩突切除对颈椎稳定性的影响。结果本研究建立了三个椎体运动节段的三维有限元模型，模型高度模拟颈椎结构与材料特性，研究了不同范围钩突切除后，颈椎稳定性受到的影响。钩突切除高度的25％后的左侧弯状态与未切除时对比分析，位移云图变化不大，最大等效应力减小。钩突切除高度的50％、60％后的左侧弯状态下的位移继续增大，最大等效应力逐渐减小。结论切除钩突高度的25％时对颈椎稳定性影响不大，随着切除钩突范围的增加，颈椎的稳定性逐渐降低。
목적：건립경추（ C4－C6）삼유유한원모형，연구구돌절제전후대경추은정성적영향。방법근거건강지원자적경추단층CT소묘서렬도상，채용Mimics13?1화SolidWorks2012연건진행삼유중건화조형，이용ANSYS15?0연건，대경추급주위조직부여불동적재료속성，건립경추（ C4－C6）삼유유한원모형。재건립적모형상가재，모의척주적전굴、후신、좌우측곡、좌우선전6충공황하적생리활동，획취위이、응력등수치운도，병진행분석험증。재 C5절단좌측구돌상분별절제구돌고도적25％、50％화60％，획득불동범위구돌절제시적좌측만상태하경추각부위적위이、응력등수치운도，분석불동범위구돌절제대경추은정성적영향。결과본연구건립료삼개추체운동절단적삼유유한원모형，모형고도모의경추결구여재료특성，연구료불동범위구돌절제후，경추은정성수도적영향。구돌절제고도적25％후적좌측만상태여미절제시대비분석，위이운도변화불대，최대등효응력감소。구돌절제고도적50％、60％후적좌측만상태하적위이계속증대，최대등효응력축점감소。결론절제구돌고도적25％시대경추은정성영향불대，수착절제구돌범위적증가，경추적은정성축점강저。
Objective We established a three?dimensional finite element model of the cervical spine ( C4-C6 ) to study uncinate process resection effects on the stability of cervical spine? Methods A three?dimensional finite element model of the cervical spine was established from the CT scan images of a healthy male using Mimics13?1, SolidWorks2012, and ANSYS15?0 software? Different materials were assigned different mechanical parameters, and we created a cervical three?dimensional finite element model based on the method of tetrahedral mesh? Loading in the established model to simulate the extension, flexion, lateral bending, rotation, the total deformation and equivalent stress of spine were obtained and verified? The left uncinate process was resected 25%, 50% and 60%respectively in the C5 section? We analyzed the effects of uncinate process resection of different range on the stability of cervical spine in left lateral bending? Results The three?dimensional finite element model with more structure integrity and geometric similarity was compartmentalized subtly? Through comparative analysis of uncinate process resection:25%, 50%, 60% compared with non resection, total deformation increased and the maximum equivalent stress decreased along with the increasing range of uncinate process resection?Conclusions The 25% resection of the uncinate process had little effect on the stability of cervical vertebrae?With the increase of uncinate process resection, the stability of the cervical spine decreased.