Interferência da irrigação final com soluções hidroalcoólicas sobre o vedamento apical nas obturações endodônticas / Marginal leakage in root canal filling after final irrigation withhydroalchoolic solutions

RESUMO

Incisivos centrais e laterais superiores humanos extraídos foram instrumentados e irrigados com soro fisiológico e, no final, com EDTA a 17% por 3 min e externamente impermeabilizados. Na sequência, foram preenchidos durante 1 min com um dos seguintes agentes GI - NaOCl a 2,5%; GII - NaOCl a 2,5% associado, em partes iguais, com álcool etílico a 99,3º; GIII - NaOCl a 2,5% associado, em partes iguais, com álcool 70 v/v; GIV - lauril sulfato de sódio associado, em partes iguais, ao álcool isopropílico. Posteriormente, foram obturados com guta percha e Sealapex® pela técnica do cone único e imersos em Rhodamine B® por sete dias. Após as raízes serem clivadas longitudinalmente, as infiltrações apicais foram analisadas pelo programa Image Tool® e os dados, submetidos à análise estatística. Os Grupos II e III demonstraram menor infiltração apical em relação aos demais grupos (p < 0,05).

ABSTRACT

The purpose of this study was to evaluate the apical marginal leakage in root treated with different alcohol content agents. Thirty seven human single-rooted teeth were instrumented and irrigated with saline solution and in sequence with 17% EDTA. Several alcohol content solutions were applied before the root canal was filled with Sealapex and gutta percha points. The specimens were then separated in following groups I – 2.5%NaOCl; II – 2.5% NaOCl with 99.3% ethylic alcohol(11 v/v); III – 2.5% NaOCl with 70 (v/v) alcohol and IV – sodium laurel sulfate with isopropyl alcohol (11v/v). All roots were immersed in 2% Rhodamine B, at environment temperature, for 7 days. The extension of dye penetration was measured by Digital Image Tools Program. Results were statistically analyzed by Kruskal Wallis method at 5% significance level. Among the experimental groups, the least extension of dye penetration were observed in groups II and III, with statistically significance of group I and IV (p < 0.05).