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Post-deposition bioink self-assembly: a quantitative study.

Ashkan Shafiee1, Matthew McCune, Gabor Forgacs

  • 1Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA. Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.

Biofabrication
|November 6, 2015
PubMed
Summary
This summary is machine-generated.

This study enhances cellular particle dynamics (CPDs) to predict tubular graft formation in bioprinting. Using cylindrical bioink units significantly speeds up the creation of tubular organ structures compared to spherical ones.

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Area of Science:

  • Bioprinting and Tissue Engineering
  • Computational Biology
  • Biomaterials Science

Background:

  • Bioprinting success relies on bioink deposition and self-assembly, governed by complex biological principles.
  • Current bioprinting often involves trial and error due to difficulties in quantifying these principles.
  • Extrusion bioprinting requires predictive models for efficient construct development.

Purpose of the Study:

  • To generalize the Cellular Particle Dynamics (CPD) computational method for predicting tubular graft formation.
  • To incorporate post-printing shrinkage effects (length and volume reduction) in CPD simulations for cylindrical bioink units.
  • To provide a predictive framework for efficient biofabrication of tubular organ structures.

Main Methods:

  • Generalized the Cellular Particle Dynamics (CPD) computational method to handle cylindrical bioink units.
  • Accounted for realistic post-printing length and volume decrease of cylindrical units.
  • Developed instructions for using CPD simulations to predict tubular graft formation.

Main Results:

  • CPD successfully predicts the formation of tubular grafts from cylindrical bioink units, considering shrinkage.
  • The study demonstrates that using cylindrical bioink units is considerably faster for building tubular structures than spherical units.
  • CPD simulations offer a direct prediction pathway, reducing the need for extensive experimental trials.

Conclusions:

  • CPD is a powerful predictive tool for extrusion bioprinting of tubular constructs.
  • Cylindrical bioink units offer a significant advantage in fabrication speed for tubular organ structures.
  • This work facilitates efficient and timely biofabrication of functional tubular tissues.