A comparative study of the physical and mechanical properties of porous hydroxyapatite scaffolds fabricated by solid freeform fabrication and polymer replication method

Jungsung Kim, Dohyung Lim, Yong Hwa Kim, Young-Hag Koh, Mi Hee Lee, Inho Han, Sung Jae Lee, Oui Sik Yoo, Han Sung Kim, Jong Chul Park

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A novel porous scaffold designed for application as a bone substitute, with a structure containing three-dimensional (3D) pore channels in a hydroxyapatite (HA) scaffold, was fabricated using a combination of a solid freeform fabrication (SFF) and cast in a mold using freezing casting method. This study was performed to evaluate the physical and biomechanical properties of the HA scaffolds fabricated by SFF and using polymer replication method (PRM), one of the conventional methods. Although the phase composition and porosity of these two scaffolds are similar, their external shape and mechanical property were different. All of the fabricated scaffolds showed similar patterns through X-ray diffraction. The difference between porosities of two HA scaffolds were not statistically significant (P>0.05). However, the average compressive strength of the scaffold fabricated by SFF was 14.6 MPa, and that of the scaffold fabricated using polymer replication was 3.56MPa (P<0.05). It was confirmed that SFF fabrication could have a relatively higher mechanical property than PRM fabrication at the same porosity.

Original languageEnglish
Pages (from-to)695-701
Number of pages7
JournalInternational Journal of Precision Engineering and Manufacturing
Volume12
Issue number4
DOIs
Publication statusPublished - 2011 Aug 1

Keywords

  • Bone substitute
  • Hydroxyapatite
  • Porous scaffold
  • Solid freeform fabrication

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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