AccScience Publishing / IJB / Volume 9 / Issue 3 / DOI: 10.18063/ijb.700
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RESEARCH ARTICLE

Flow performance of porous implants with different geometry: Line, surface, and volume structures

Zhuxun Tang1,2† Yueting Zhou1† Lifang Ma2 Jian Li3*
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1 School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai, 200092, P.R. China
2 Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, 100176, P.R. China
3 School of Automation, Beijing University of Posts and Telecommunications, Beijing, 100876, P.R. China
Submitted: 28 October 2022 | Accepted: 14 December 2022 | Published: 6 March 2023
(This article belongs to the Special Issue 3D Printing of Advanced Biomedical Devices)
© 2023 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

Additive manufacturing has enormous advantage of personalized adaptation. Particularly, porous implants have been widely used in clinical practice. Porous implant has the advantages and abilities to promote tissue growth and mass transfer, which are closely related to pore morphology. The purpose of this study is to investigate the effects of three porous structures, i.e., line structure, surface structure, and volume structure, on the flow properties of implants at different porosity. Therefore, a unit cell was selected from each type of structure (oct truss [OT], gyroid [G], and schwarz p [P]) as a typical cell, where OT is a line structure, G is a surface structure, and P is a volume structure. The scaffolds with different porosity of these cells were customized, and the shape parameters were measured and calculated. Then, the flow performance of three different scaffolds in Dulbecco’s modified Eagle’s medium was simulated by using computational fluid dynamics, and the flow velocity, permeability, and wall shear stress, which can reflect their biological properties, were calculated and compared. The results showed that the pore shape and porosity of porous implants greatly affected the physical parameters and performance of structures. These findings will contribute to unit cell selection and future performance optimization of porous implants.

Keywords
Porous implants
Computational fluid dynamics
Flow velocity
Permeability
Flow shear stress
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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing