Osteoblast proliferation on hydroxyapatite thin coatings produced by right angle magnetron sputtering

A. Mello*, Z. Hong, A. M. Rossi, L. Luan, M. Farina, W. Querido, J. Eon, J. Terra, G. Balasundaram, T. Webster, A. Feinerman, D. E. Ellis, J. B. Ketterson, C. L. Ferreira

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Right angle magnetron sputtering (RAMS) was used to produce hydroxyapatite (HA) film coatings on pure titanium substrates and oriented silicon wafer (Si(0 0 1)) substrates with flat surfaces as well as engineered surfaces having different forms. Analyses using synchrotron XRD, AFM, XPS, FTIR and SEM with EDS showed that as-sputtered thin coatings consist of highly crystalline hydroxyapatite. The HA coatings induced calcium phosphate precipitation when immersed in simulated body fluid, suggesting in vivo bioactive behavior. In vitro experiments, using murine osteoblasts, showed that cells rapidly adhere, spread and proliferate over the thin coating surface, while simultaneously generating strong in-plane stresses, as observed on SEM images. Human osteoblasts were seeded at a density of 2500 cells cm-2 on silicon and titanium HA coated substrates by RAMS. Uncoated glass was used as a reference substrate for further counting of cells. The highest proliferation of human osteoblasts was achieved on HA RAMS-coated titanium substrates. These experiments demonstrate that RAMS is a promising coating technique for biomedical applications.

Original languageEnglish (US)
Article number003
Pages (from-to)67-77
Number of pages11
JournalBiomedical Materials
Volume2
Issue number2
DOIs
StatePublished - Jun 1 2007

ASJC Scopus subject areas

  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

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