Influence of post-deposition heating time and the presence of water vapor on sputter-coated calcium phosphate crystallinity

Y. Yang, K. H. Kim, C. M. Agrawal, J. L. Ong

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Extensive research suggested that calcium phosphate (CaP) coatings on titanium implants are essential for early bone response. However, the characterization of CaP crystallinity and the means to control coating crystallinity are not well-established. In this study, the effect of a 400°C heat treatment for 1, 2, or 4 hours, and in the presence or absence of water vapor, on CaP crystallinity was investigated. Scanning electron microscopy indicated dense as-sputtered coatings. Increase in coating crystallinity was observed to be consistent with the increasing number of PO4 peaks observed as a result of different heat treatments. In addition, x-ray diffraction analyses indicated amorphous as-sputtered coatings, whereas crystalline CaP coatings in the range of 0-85% were observed after different post-deposition heat treatments. It was concluded that the presence of water vapor and post-deposition heat treatment time significantly affect the crystallinity of CaP coatings, which may ultimately affect bone healing.

Original languageEnglish (US)
Pages (from-to)833-837
Number of pages5
JournalJournal of dental research
Volume82
Issue number10
DOIs
StatePublished - Oct 2003

Keywords

  • Calcium phosphate coating
  • Crystallinity
  • Fourier transform infrared spectroscopy
  • Heat treatment
  • X-ray diffraction

ASJC Scopus subject areas

  • Dentistry(all)

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