Highly porous hydroxyapatite scaffolds with elongated pores using stretched polymeric sponges as novel template

In Hwan Jo, Kwan Ha Shin, Young Mi Soon, Young Hag Koh, Jong Hoon Lee, Hyoun Ee Kim

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

This study reports a simple way of improving the compressive strength of highly porous hydroxyapatite (HA) scaffolds by adopting elongated polymeric sponges as a novel template. In this method, as-received polymeric sponges with isotropic pores were stretched uniaxially to 50% elongation at 200 °C for 2 h, and then coated with a HA slurry. The HA-coated sponges were heat-treated at 800 °C for 3 h to remove the polymeric sponges and at 1250 °C for 3 h to sinter the HA walls. The fabricated samples showed a highly anisotropic pore structure with elongated pores parallel to the direction of the elongation of the polymeric sponge. This simple method allowed a highly porous scaffold to have a high compressive strength of 3.8 ± 0.1 MPa at a porosity of 76% when tested parallel to the direction of pore elongation.

Original languageEnglish
Pages (from-to)1702-1704
Number of pages3
JournalMaterials Letters
Volume63
Issue number20
DOIs
Publication statusPublished - 2009 Aug 15

Keywords

  • Ceramics
  • Hydroxyapatite
  • Mechanical properties
  • Porosity
  • Sponge replication

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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