中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (30): 4796-4801.doi: 10.12307/2023.544

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

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

张  亮1,2,3,韩泽奎1,2,3,臧旖欣1,2,3,韩振佳1,2,3,王心彧1,2,3   

  1. 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;佳木斯大学,2口腔医学工程实验中心,3口腔医学院,黑龙江省佳木斯市  154002
  • 收稿日期:2022-07-26 接受日期:2022-09-06 出版日期:2023-10-28 发布日期:2023-04-01
  • 通讯作者: 王心彧,副主任医师,硕士生导师,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;佳木斯大学,口腔医学工程实验中心,口腔医学院,黑龙江省佳木斯市 154002
  • 作者简介:张亮,男,1995年生,湖南省长沙市人,汉族,佳木斯大学口腔医学院在读硕士,执业医师,主要从事口腔种植方向的研究。
  • 基金资助:
    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(JJ2022LH1032),项目负责人:王心彧

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

Zhang Liang1, 2, 3, Han Zekui1, 2, 3, Zang Yixin1, 2, 3, Han Zhenjia1, 2, 3, Wang Xinyu1, 2, 3   

  1. 1The Key Laboratory of Biomedical Materials and Clinical Application in Heilongjiang Province, Jiamusi 154002, Heilongjiang Province, China; 2Experimental Center for Stomatological Engineering, 3School of Stomatology, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China
  • Received:2022-07-26 Accepted:2022-09-06 Online:2023-10-28 Published:2023-04-01
  • Contact: Wang Xinyu, Associate chief physician, Master’s supervisor, The Key Laboratory of Biomedical Materials and Clinical Application in Heilongjiang Province, Jiamusi 154002, Heilongjiang Province, China; Experimental Center for Stomatological Engineering and School of Stomatology, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China
  • About author:Zhang Liang, Master candidate, The Key Laboratory of Biomedical Materials and Clinical Application in Heilongjiang Province, Jiamusi 154002, Heilongjiang Province, China; Experimental Center for Stomatological Engineering and School of Stomatology, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China
  • Supported by:
    Foundation for Young Talents in Jiamusi University in 2022, No. JMSUQP2022028 (to ZYX); the Natural Science Foundation of Heilongjiang Province, No. JJ2022LH1032 (to WXY)

摘要:


文题释义:

3D打印个性化钛网:利用计算机辅助设计技术设计与患者颌骨形态贴合并且具有预期骨增量水平的个性化钛网模型,然后通过计算机辅助制造,最终将这种个性化钛网用于引导骨组织再生手术,极大缩短手术时长及降低钛网暴露率,尤其适用于大面积、解剖形态复杂的骨缺损病例。
蛛网孔隙结构:由圆环形纬线和规则经线组成,根据结构变形的梯度变化布置圆环形纬线,规则经线从中心点沿变形变化的梯度方向布置。规则经线与圆环形纬线结构相互连接组成的蛛网孔隙结构,在受力区能很好地抵抗结构的变形,分散结构受到的应力,提高了结构刚度。

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1 633.5,1 611.3,2 131.2,1 104.8 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。 

https://orcid.org/0000-0002-6779-2052(张亮)

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料口腔生物材料纳米材料缓释材料材料相容性组织工程

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

Abstract: 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 1 633.5, 1 611.3, 2 131.2, and 1 104.8 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 meet the requirements of mechanical strength for reconstruction of large-area jaw defects. 

Key words: skull defect, bionic porous spider web-shaped structure, 3D printed individualized titanium mesh, bone augmentation, 3D finite element analysis, biomechanics

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