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

doi:10.12307/2023.544

Abstract

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

CLC Number:

Zhang Liang, Han Zekui, Zang Yixin, Han Zhenjia, Wang Xinyu. Design and three-dimensional finite element analysis of 3D printed individualized titanium mesh with a bionic porous spider web-shaped structure[J]. Chinese Journal of Tissue Engineering Research, 2023, 27(30): 4796-4801.

Figures/Tables 3

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