Near-net shape structures fabricated by micro-robotic deposition using precision extrusion control

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work investigates an additive manufacturing process, micro-Robotic Deposition (μRD), and its utility in fabricating advanced architecture synthetic bone grafts. The objective of this research is to develop a method to integrate different regions with different porous microstructures into a single scaffold; there is evidence that scaffolds with designed regions of specific microstructures can be used to elicit a strong and directed bone ingrowth response that improves bone ingrowth rate and quality. The key contribution of this work is integration of a control algorithm that precisely places different build materials in specified locations with a workflow that enables near-net shape fabrication, thereby the fabrication of advanced architecture scaffolds is feasible. Under previous control methods, designs were relegated to be composed of a single material with simple contours. Scaffolds with contoured forms, multiple domains with distinct porous microstructures, and hollow cavities are feasible when the developed controller is used in conjunction with a novel manufacturing workflow in which scaffolds are filled within patterned molds that support overhanging features.

Original languageEnglish (US)
Title of host publicationASME/ISCIE 2012 International Symposium on Flexible Automation, ISFA 2012
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages271-278
Number of pages8
ISBN (Print)9780791845110
DOIs
StatePublished - Jan 1 2012
EventASME/ISCIE 2012 International Symposium on Flexible Automation, ISFA 2012 - St. Louis, MO, United States
Duration: Jun 18 2012Jun 20 2012

Publication series

NameASME/ISCIE 2012 International Symposium on Flexible Automation, ISFA 2012

Other

OtherASME/ISCIE 2012 International Symposium on Flexible Automation, ISFA 2012
CountryUnited States
CitySt. Louis, MO
Period6/18/126/20/12

ASJC Scopus subject areas

  • Artificial Intelligence
  • Control and Systems Engineering

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    Hoelzle, D. J., Alleyne, A. G., & Johnson, A. J. W. (2012). Near-net shape structures fabricated by micro-robotic deposition using precision extrusion control. In ASME/ISCIE 2012 International Symposium on Flexible Automation, ISFA 2012 (pp. 271-278). (ASME/ISCIE 2012 International Symposium on Flexible Automation, ISFA 2012). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/ISFA2012-7240