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3D Printing of Gradient Osteochondral Scaffolds Using Soy-Oil Resin

[+] Author Affiliations
Margaret A. Nowicki, Michael W. Plesniak, Lijie Grace Zhang

George Washington University, Washington, DC

Paper No. IMECE2016-66680, pp. V003T04A075; 5 pages
doi:10.1115/IMECE2016-66680
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 3: Biomedical and Biotechnology Engineering
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5053-4
  • Copyright © 2016 by ASME

abstract

Significant challenges exist for replicating osteochondral tissue due to the disparate, gradient nature of natural tissue in this region. The graded transition that exists in this region, moving from subchondral bone to hyaline cartilage at the joint surface, presents unique biological and mechanical challenges for tissue engineering. Past research identified a favorable pore distribution for 3D printed scaffolds. The objective of this research is to use that distribution and further investigate the effects of scaffold material selection and bioactive particle distribution on mechanical, biological, and physiological properties of 3D printed tissue engineered osteochondral scaffolds. Our results indicate that scaffolds constructed with a novel soy-based polymer outperform those constructed with ploy(ethylene glycol)-diacrylate (PEG-DA). This study also indicates that incorporating nanocrystalline hydroxyapatite (nHA) into the soy resin scaffold further improves cellular performance. Additionally, the nHA can be integrated in a controlled fashion to affect only the osteogenic portion of the osteochondral construct.

Copyright © 2016 by ASME

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