Bioink properties before, during and after 3D bioprinting

Area of Science:

• Bioprinting and Regenerative Medicine
• Biomaterials Science
• Computational Biology

Background:

• Bioprinting utilizes additive manufacturing with living cells in bioinks, typically hydrogel precursors.
• Bioink properties (printability, cell survival) and post-gelation construct maturation are critical for tissue engineering.
• Cellular behavior within the hydrogel significantly impacts the final tissue construct's properties.

Purpose of the Study:

• To review essential bioink properties and their influence on bioprinting outcomes.
• To discuss the interplay between cells and hydrogel materials during bioprinting.
• To explore computational frameworks for predicting and optimizing bioprinting processes and tissue maturation.

Main Methods:

• Review of relevant literature on bioink properties and bioprinting techniques.
• Discussion of hydrogel-cell interactions and their impact on material processing.
• Implementation of numerical approaches to model cellular mechanics and predict mechanical properties of hydrogel constructs.

Main Results:

• Key bioink properties influencing printability (resolution, fidelity, cell survival) were identified.
• The reciprocal effects of cells on hydrogel processing and vice versa were highlighted.
• Computational models demonstrated the ability to predict tissue development and optimize bioprinting parameters based on cell density and material interactions.

Conclusions:

• Optimized bioink formulation and computational modeling are essential for successful bioprinting.
• Understanding cell-material interactions is crucial for achieving desired mechanical properties in bioprinted tissues.
• Predictive computational frameworks can guide the design of advanced bioprinted tissue constructs for various applications.