Analysis of depth of the microporosity in a nickel-chromium system alloy: effects of electrolytic, chemical and sandblasting etching
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Data
2003-05-01
Autores
Neto, H. G.
Candido, MSM
Junior, ALR
Garcia, Patrícia Petromilli Nordi Sasso [UNESP]
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Editor
Blackwell Publishing
Resumo
The present study was designed to analyse the average depth of the microporosity of a nickel-chromium (Ni-Cr) system alloy (Verabond II). The metal surface was subject to one of the following surface treatment: (i) Electrolytic etching in nitric acid 0.5 N at a current density of 250 mA cm(-2) ; (ii) chemical etching with CG-Etch etchant; and (iii) Sandblasting with alumina particles 50 mum. Half of the samples were polished before the surface treatments. The depth of porosity was measured through photomicrographs (500x) with a profilometer, and the data were statistically analysed using an analysis of variance (anova) followed by Tukey's test. The conclusions were (i) Differents surface treatment of the Ni-Cr system alloy lead to different depths of microporosity; (ii) the greatest depth of porosity was observed in non-polished alloy; (iii) the greatest and identical depth of microporosity was observed following electrolytic etching and chemical etching; (iv) the least and identical depth of microporosity was observed with chemical etching and sandblasting with alumina particles 50 mum, and (v) Chemical etching showed an intermediary depth.
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Palavras-chave
resin bonded bridge, electrolytic etching, chemical etching, sandblasting
Como citar
Journal of Oral Rehabilitation. Oxford: Blackwell Publishing Ltd, v. 30, n. 5, p. 556-558, 2003.