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

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53 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

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Keywords

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

ASJC Scopus subject areas

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

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