| Autor: |
Wang, Russell R., Welsch, Gerhard E., Monteiro, Othon |
| Zdroj: |
Journal of Biomedical Materials Research; August 1999, Vol. 46 Issue: 2 p262-270, 9p |
| Abstrakt: |
Failures that occur in titanium–ceramic restorations are of concern to clinicians. The formation of poorly adhering oxide on titanium at dental porcelain sintering temperatures causes adherence problems between titanium and porcelain, which is the main limiting factor in the fabrication of titanium–ceramic restorations. To overcome this problem a 1μm thick Si3N4coating was applied to a titanium surface using a plasmaimmersion implantation and deposition method. Such a coating serves as an oxygen diffusion barrier on titanium during the porcelain firings. The protective coating was characterized in the asdeposited condition and after thermal cycling. Cross sections of TiSi3N4–porcelain interface regions were examined by various electron microscopy methods and by energy dispersive analysis of Xrays to study the Si3N4films effectiveness in preventing titanium oxidation and in forming a bond with porcelain. The experiments have shown that this Si3N4coating enables significant improvement in Ti–ceramic bonding. © 1999 John Wiley & Sons, Inc. J Biomed Mater Res, 46, 262–270, 1999. |
| Databáze: |
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