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

Area of Science:

• Biomaterials Engineering
• Computational Fluid Dynamics
• Tissue Engineering

Background:

• Additive manufacturing enables personalized porous implants, crucial for promoting tissue growth and mass transfer.
• Pore morphology in porous implants directly influences their biological performance and clinical efficacy.

Purpose of the Study:

• To investigate the effects of line, surface, and volume porous structures on implant flow properties.
• To analyze how different porosities within these structures affect key physical and biological parameters.

Main Methods:

• Selected unit cells representing line (oct truss), surface (gyroid), and volume (schwarz p) structures.
• Customized scaffolds at varying porosities and measured their shape parameters.
• Simulated fluid flow (Dulbecco's modified Eagle's medium) using computational fluid dynamics.

Main Results:

• Pore shape and porosity significantly altered flow velocity, permeability, and wall shear stress.
• Different structures exhibited distinct flow characteristics influenced by their geometric design and porosity.

Conclusions:

• Findings highlight the critical role of pore architecture in determining porous implant performance.
• This study provides valuable insights for selecting appropriate unit cells and optimizing porous implant designs for clinical applications.