AccScience Publishing / IJB / Online First / DOI: 10.36922/ijb.2306
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RESEARCH ARTICLE

Parametric design and performance study of continuous gradient triply periodic minimal surface bone scaffold

Shuangyu Liu1 Jinlong Feng1 Fulong Zhang1* Weibo Jiang2 Tatiana Mikhailovna Vasilieva3 Ping Lu4 Sen Lu1
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1 College of Mechanical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu, China
2 Department of Orthopaedics, The Second Hospital of Jilin University, Changchun, Jilin, China
3 Joint Institute for High Temperatures of Russian Academy of Sciences, Izhorskaya str., 13, Bd.2, Moscow, Russia
4 College of Automotive Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu, China
Submitted: 24 November 2023 | Accepted: 19 January 2024 | Published: 7 February 2024
© 2024 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
Abstract

Continuous gradient triply periodic minimal surface (TPMS) porous structure has been proven to be one of the most suitable structures for bone implants due to their excellent mechanical properties and high porosity. This study establishes a parametric modeling method for continuous gradient TPMS structures and optimizes the TPMS porous structure with a continuous gradient change in porosity. Ti-6Al-4V continuous gradient TPMS porous structures were prepared using powder bed fusion (PBF). The mechanical properties and permeability of the continuous gradient TPMS porous structure were studied. The results indicate that the porosity control parameter C for gradient continuous change follows a linear function, with the porosity increasing linearly within the specified range of values. The influence of the periodic parameter ω on the mechanical properties and permeability of different types of TPMS structures varies. The Gyroid continuous gradient structure aligns more closely with the mechanical properties and permeability of bone scaffolds. Furthermore, a TPMS continuous gradient porous structure that is more suitable for trabecular bone implants was obtained through topology optimization design. A bone implant model and object suitable for human trabecular bone were designed and printed, providing technical support for subsequent performance testing and application research of bone implants.

Keywords
Triply periodic minimal surface
Additive manufacturing
Bone scaffold
Mechanical properties and permeability
Funding
This work was supported by the funding for School- Level Research Projects of the Yancheng Institute of Technology (No. XJR2020033) and the Innovative and Entrepreneurial Talent Foundation of Jiangsu Province (No. JSSCRC2021545).
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Conflict of interest
The authors declare no conflicts of interest.
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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing