Fabrication of bloactive glass-ceramics by selective laser sintering

Ruth D. Goodridge, Chikara Ohtsuki, Masanobu Kamitakahara, David J. Wood, Kenny W. Dalgarno

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The feasibility of processing glass-ceramics using the layer manufacturing technique, selective laser sintering (SLS), to produce parts with suitable biological and mechanical properties for use in bone replacement applications, has been investigated. Glass-ceramics derived from glasses based on several different systems have been considered. Initial experiments using an apatite-mullite glass-ceramic (4.5SiO2·3Al2O 3·1.6P2O5·3CaO·2CaF 2) demonstrated the ability to process glass-ceramic materials using this technique, creating parts with a strength similar to that of cancellous bone, and a porous structure that was shown in vivo to be suitable for the ingrowth of bone. Concerns over the inability of the apatite-mullite material to form an apatite layer on its surface when soaked in a simulated body fluid (SBF) has led to the development of Al2O3-free glasses based on the systems (50-x)CaO·45SiO2·5P 2O5·xCaF2 and (48-x) CaO·45SiO2·5P2O5·2CaF 2·xNa2O. These materials have demonstrated good in vitro bioactivity, and therefore have good potential as candidates for processing by an indirect SLS method for the production of custom-made bone implants.

Original languageEnglish
Pages (from-to)289-292
Number of pages4
JournalKey Engineering Materials
Volume309-311 I
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes

Keywords

  • Bioactivity
  • Bone replacement
  • Layer manufacturing
  • Simulated Body Fluid

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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