仿生蛛网孔隙结构3D打印个性化钛网设计及三维有限元分析  

Design and three-dimensional finite element analysis of 3D printed individualized titanium mesh with a bionic porous spider web-shaped structure

作　　者：张亮 韩泽奎[1,2,3] 臧旖欣 韩振佳 王心彧 Zhang Liang;Han Zekui;Zang Yixin;Han Zhenjia;Wang Xinyu(The Key Laboratory of Biomedical Materials and Clinical Application in Heilongjiang Province,Jiamusi 154002,Heilongjiang Province,China;Experimental Center for Stomatological Engineering,Jiamusi University,Jiamusi 154002,Heilongjiang Province,China;School of Stomatology,Jiamusi University,Jiamusi 154002,Heilongjiang Province,China)

机构地区：[1]黑龙江省生物医学材料及应用重点实验室,黑龙江省佳木斯市154002 [2]佳木斯大学口腔医学工程实验中心,黑龙江省佳木斯市154002 [3]佳木斯大学口腔医学院,黑龙江省佳木斯市154002

出　　处：《中国组织工程研究》2023年第30期4796-4801,共6页Chinese Journal of Tissue Engineering Research

基　　金：2022年佳木斯大学青年创新人才培养支持计划项目(JMSUQP2022028),项目负责人:臧旖欣;黑龙江省自然科学基金项目(LH2022H089),项目负责人:王心彧

摘　　要：背景:蜘蛛网结构具有内在的能量耗散机制,使其能承受较大的集中负荷,将其应用到3D打印个性化钛网设计上来减少由于应力集中引起的局部断裂。目的:研究新型仿生蛛网孔隙结构3D打印个性化钛网的设计方法,并应用三维有限元法对其进行生物力学分析。方法:应用锥形束CT、Mimics、Geomagic Wrap、3-matic Research和ANSYS Workbench等软件分别建立仿生蛛网孔隙结构、圆孔结构、方孔结构、六边形孔结构且厚度均为0.3 mm的4组个性化钛网有限元模型,将100 N的载荷加载在牙槽嵴顶对应的钛网上,进行有限元分析。结果与结论:①方孔、圆孔、六边形孔、仿生蛛网孔隙结构个性化钛网最大位移值分别为0.064,0.103,0.107,0.070 mm,等效应力最大分别为1633.5,1611.3,2131.2,1104.8 MPa;②各组固位螺钉在钛网受力后应力分布相似,主要集中在螺钉颈部与钛网相接触部位,方孔、圆孔、六边形孔、仿生蛛网孔隙结构个性化钛网组固位螺钉最大等效应力值分别为149.13,200.32,178.73,163.30 MPa,各组固位螺钉所受到的应力处于安全范围内;③结果显示,仿生蛛网孔隙结构个性化钛网能很好地分散钛网应力,减少应力集中现象;同时,0.3 mm厚度仿生蛛网孔隙结构个性化钛网可以满足大面积颌骨缺损重建机械强度的要求。BACKGROUND:The spider web-shaped structure has an inherent capability to dissipate energy to withstand large concentrated loads,which is applied to the design of 3D printed individualized titanium mesh to reduce local fractures caused by stress concentration.OBJECTIVE:To explore the design method of a novel 3D printed individualized titanium mesh with a bionic porous spider web-shaped structure and analyze the biomechanical characteristics of the titanium mesh using 3D finite element method.METHODS:The CBCT,Mimics,Geomagic Wrap,3-matic Research and ANSYS Workbench softwares were used to establish individualized titanium mesh finite element models with bionic porous spider web-shaped,circular pore,square pore,and hexagonal pore structures with a thickness of 0.3 mm,respectively.A load of 100 N was applied to the titanium mesh corresponding to the alveolar crest for mechanical finite element analysis.RESULTS AND CONCLUSION:(1)The maximum deformation values of the individualized titanium mesh for square pore,circular pore,hexagonal pore structures,and bionic porous spider web-shaped structures were 0.064,0.103,0.107,and 0.070 mm,respectively,and the maximum equivalent stress values were 1633.5,1611.3,2131.2,and 1104.8 MPa,respectively.(2)The stress distribution of retaining screws in the titanium mesh in each group was similar,mainly concentrated in the contact area between the screw neck and the titanium mesh,and the maximum equivalent stress values of the retaining screws in the square pore,circular pore,hexagonal pore structures,and bionic porous spider web-shaped structure groups were 149.13,200.32,178.73,and 163.30 MPa,respectively,and the stress of retaining screws in each group was within the safe range.(3)These findings suggest that the individualized titanium mesh with a bionic porous spider web-shaped structure can well disperse the stress of the titanium mesh and reduce stress concentration.In addition,0.3 mm thickness of the individualized titanium mesh with a bionic porous spider web-shaped structure me

关 键 词：颅骨缺损 仿生蛛网孔隙结构 3D打印个性化钛网 骨增量 三维有限元分析 生物力学 

分 类 号：R459.9[医药卫生—治疗学] R314[医药卫生—临床医学] R782.13