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A Micro-Scale Non-Linear Finite Element Model to Optimize the Mechanical Behavior of Bioprinted Constructs
Abhinaba Banerjee1, Sudipto Datta2, Ankita Das2
1Department of Mechanical Engineering, Indian Institute of Engineering Science and Technology, Howrah, India.
3D Printing and Additive Manufacturing
|January 20, 2023
Summary
Optimizing bioinks for bioprinting is crucial. This study used modeling to predict how bioink properties affect cell stress, enabling faster development of better tissue constructs.
Area of Science:
- Bioprinting and Tissue Engineering
- Biomaterials Science
- Computational Biology
Background:
- Extrusion-based bioprinting fabricates patient-specific tissue constructs.
- Optimizing bioink properties is vital for clinical translation.
- Hydrogel concentrations impact mechanical integrity and cell viability.
Purpose of the Study:
- To model the effects of bioink parameters on cellular stress during bioprinting.
- To investigate how bioink composition and concentration influence stress distribution.
- To provide a method for rapid bioink optimization and construct design.
Main Methods:
- Nonlinear finite element modeling (FEM) was employed.
- FEM was used to simulate stress experienced by cells within bioprinted constructs.
- Stress distribution was analyzed across different construct regions and cell types.
Main Results:
- Bioink chemical composition and concentration significantly alter cellular stress.
- Softer cell regions near pores amplified stress concentrations up to threefold.
- FEM accurately predicted stress distribution based on bioink properties.
Conclusions:
- Bioink optimization through computational modeling accelerates development.
- Understanding stress distribution aids in designing bioprinted constructs with homogenous properties.
- This approach facilitates improved toolpath planning for bioprinting.
