Biomechanical properties of trabecular bone prosthesis with triply periodic minimal surfaces unit structure

doi:10.12307/2022.579

Abstract

Abstract: BACKGROUND: Three-dimensional printed trabecular bone structure is one of the emerging technologies, and the unique structural and biomechanical properties can meet the clinical needs of more patients, which has become one of the development directions of precision medicine in the future. However, application of this technology is still in its preliminary stage and little is reported on its theoretical application.
OBJECTIVE: To establish a biomechanical finite element model of trabecular bone prosthesis based on triply periodic minimal surfaces unit structure, and to analyze the biomechanical differential properties of different curved surface structures.
METHODS: The curved sheet structure was generated according to the function formula in Matable software, and then trabecular bone prosthesis with the triply periodic minimal surfaces unit structure was designed by Magics 19.0. The tetrahedral mesh was divided in ABAQUS to simulate the stress environment of the human body in standing position. The stress distribution and displacement were analyzed and the biomechanical differences in the host environment were compared.
RESULTS AND CONCLUSION: S, D and G curved surface structures had no significant difference in porosity and biomechanical performance. Compared with the traditional structures, they had obvious changes and better biomechanical properties. The porosity of porous structure determined the biomechanical properties of the prosthesis. The composite layer of the porous prosthesis had interlayer bonding, which was prone to stress mutation. The porous structure could greatly reduce the severe stress shielding effect between the implant and the host bone.

Key words: trabecular bone structure, three-dimensional printing, triply periodic minimal surfaces, biomechanics, finite element analysis

CLC Number:

Liu Qingbo, Su Zhiyang, Wang Hengfeng, Zhao Yu, Lyu Jia. Biomechanical properties of trabecular bone prosthesis with triply periodic minimal surfaces unit structure[J]. Chinese Journal of Tissue Engineering Research, 2022, 26(15): 2297-2301.

Figures/Tables 4

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