Utilização do ácido ascórbico como tentativa de reverter o efeito da desproteinização com hipoclorito de sódio na dentina radicular, utilizando diferentes sistemas de cimentação / Redox potencial of ascorbic acid after sodium hypochlorite deproteinization to root dentine with different adhesive systems

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The aim of this study was to evaluate the effect of ascorbic acid after root dentin treatment with sodium hypochlorite. A self-adhesive cement was compared with other two adhesive systems. The bond strength was also evaluated at different depths (coronal, middle, apical). Forty five single-rooted standard bovine teeth were divided in three groups. Specimens in each group were treated as follows: irrigation with physiologic serum; with NaOCl (5%) for 10 min; with NaOCl for 10 min and ascorbic acid for 10 min. The self-adhesive cement Rely X U100 was used for each one of the mentioned groups. The cement Rely X ARC was used with other two adhesives (Single Bond and Clearfil SE Bond). Specimens were stored in distilled water for 24 hours. Push-out tests were performed by using a universal testing machine, and the data was statistically analyzed (analysis of variance [ANOVA] and Dunnet T3; P <.05) A significant difference was not found among the materials tested. The deproteinization resulted in reduced bond strengths; though the subsequent treatment with ascorbic acid was capable to return the bond strengths. Differences among the region of post space were found: coronal>middle>apical. The ascorbic acid was capable to reverse the oxidation effect of the dentin deproteinization; the self-adhesive cement was similar to the other systems tested.

ASSUNTO(S)

Ácido ascórbico fiber post dental materials ascorbic acid dentin hipoclorito de sódio materiais dentários pino de fibra de vidro sodium hypochlorite dentina

ACESSO AO ARTIGO

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