Bonding strength of the apatite layer formed on glass-ceramic apatite-wollastonite-polyethylene composites

J. A. Juhasz, S. M. Best, M. Kawashita, N. Miyata, T. Kokubo, T. Nakamura, W. Bonfield

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Bioactive glass-ceramic apatite-wollastonite (A-W) has been incorporated into polyethylene in particulate form to create new bioactive composites for potential maxillofacial applications. The effects of varying the volume fraction of glass-ceramic A-W filler and the glass-ceramic A-W particle size were investigated by measuring the bonding strength of the bonelike apatite layer formed on the surface of glass-ceramic A-W-polyethylene composites. The bonding strength was evaluated via a modified ASTM C-333 standard in which a tensile stress was applied to the substrate and the strength of the bioactive layer was compared with that formed on commercially available hydroxyapatite-polyethylene composite samples, HAPEX™. The composites demonstrated greater bonding strength with increased filler content and reduced filler particle size (maximum 6.9 ± 0.5 MPa) and a marginally greater bonding strength as compared with HAPEX™ (2.8 ± 0.5 MPa), when glass-ceramic A-W-polyethylene composite samples with the same filler content were tested. The higher bonding strength of the apatite layer formed on the A-W-polyethylene composite samples suggests that, in addition to maxillofacial applications, these composites might also be utilized in applications involving higher levels of load bearing.

Original languageEnglish
Pages (from-to)952-959
Number of pages8
JournalJournal of Biomedical Materials Research - Part A
Volume67
Issue number3
DOIs
Publication statusPublished - 2003 Dec 1

Keywords

  • Bonding strength
  • Composite
  • Glass-ceramic apatite-wollastonite
  • Polyethylene
  • Volume fraction

ASJC Scopus subject areas

  • Ceramics and Composites
  • Biomaterials
  • Biomedical Engineering
  • Metals and Alloys

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