Avaliação da remoção de debris após irrigação com EDTA 17% e EGTA 1% associados ao hipoclorito de Sódio 1% – análise histológica
Abstract
Avaliou-se a capacidade de limpeza das paredes de canais radiculares de duas diferentes soluções quelantes (EDTA 17% e EGTA 1%) no terço apical. Utilizaram-se 20 dentes incisivos centrais inferiores humanos, divididos em 2 grupos, em função da solução irrigante utilizada no preparo biomecânico da seguinte forma: GRUPO I – EDTA 17%, GRUPO II – EGTA 1%. As duas soluções foram associadas ao hipoclorito de sódio 1% na proporção 1:1. A instrumentação dos canais radiculares foi realizada por meio da técnica escalonada programada, e os mesmos eram irrigados com 4 ml de solução a cada troca de instrumento, sendo 2 ml da solução quelante e 2 ml de hipoclorito de sódio. No preparo dos espécimes para exame microscópico selecionaram- se 15 cortes do terço apical. Para a análise morfométrica, empregou-se um estereomicroscópio com aumento de 10× e uma grade de integração de 100 pontos. A análise estatística dos resultados mostrou haver diferenças estatísticas (p < 0,05) entre as soluções estudadas com vantagem para o EDTA. A adição das soluções quelantes à solução de hipoclorito de sódio 1% na proporção 1:1 não produzem paredes dentinárias de canais isentas de detritos no terço apical.
UNITERMOS: quelantes; EDTA; EGTA; preparo do canal radicular, limpeza.
SUMMARY
To evaluate capacity of cleanness of the walls of canals of two different solutions (17% EDTA and 1% EGTA) on the apical thirds. Twenty recently extracted mandibular incisors with a single root canal was divided into two groups were instrumented using the hand instrumentation: GROUP I – 17% EDTA and GROUP II – 1% EGTA The two solutions had been associates to the 1% sodium hypochlorite in ratio 1:1. The instrumentation of the canals was carried through by means of the step back technique, and the same ones were irrigated with 4 ml of solution to each exchange of instrument, being 2 ml of the chelator solutions and 2 ml of sodium hypochlorite. The specimens had been submitted to the histological preparation, being selected homogeneously 15 cuts of middle and apical third of each specimens. For the morfhometric analysis, a photomycroscopic with 10× and a grid of integration of 100 points was used. The statistical analysis of the results showed there to be statistical differences (p < 0,05) among the solutions studied with advantage for EDTA. The addition of the solutions chelators to the 1% sodium hypochlorite solution rate 1:1 doesn’t produce walls cleaner each groups of debris in the third apical.
UNITERMS: chelators; EDTA; EGTA; instrumentation; cleanness.
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