Efeito de diferentes soluções utilizadas como irrigante final na superfície dentinária: análise de rugosidade
Effect of different solutions used as final irrigant on dentin surface: roughness analysis
Prado, Maíra do; Assis, Danielle Ferreira de; Simão, Renata Antoun
Resumo
Introdução: O uso de irrigantes pode gerar alterações microestruturais na superfície dentinária, entre as quais alterações na rugosidade. Essas alterações podem influenciar o processo de união dos materiais obturadores à dentina. Objetivo: O objetivo do presente trabalho foi avaliar o efeito das soluções de EDTA, hipoclorito de sódio (NaOCl) e clorexidina, como irrigante final, na rugosidade da superfície dentinária. Material e método: Foram utilizadas raízes distais de seis terceiros molares inferiores, que foram planificadas com o auxílio de disco de lixa e cortadas em segmentos, totalizando 18 amostras. A análise inicial foi realizada utilizando-se o perfilômetro Dektak. Foram realizadas cinco varreduras por amostra. Em seguida, as amostras foram irrigadas com NaOCl para simular o preparo químico-mecânico e lavadas com água destilada. Foram então divididas em seis grupos de acordo com o protocolo de irrigação final: Água destilada; NaOCl 5,25%; clorexidina 2%; EDTA17%; EDTA 17% + NaOCl 5,25%, e EDTA 17% + clorexidina 2%. Novamente, em cada amostra, foram realizadas cinco varreduras, totalizando 15 varreduras por grupo. Os dados foram analisados estatisticamente pelos testes de Kruskal-Wallis e Mann‑Whitney (p<0,05). Resultado: Foi encontrada alteração significativa da rugosidade somente no grupo em que houve a combinação do agente quelante com o NaOCl. Conclusão: Os protocolos de irrigação final apresentam diferentes efeitos na rugosidade da superfície dentinária.
Palavras-chave
Abstract
Introduction: The use of irrigators can create microstructural changes in the dentin surface, including changes in roughness. These changes may influence the bonding process of filling materials to dentin. Objective: The aim of this study was to evaluate the effect of EDTA, sodium hypochlorite or chlorhexidine, as final irrigant, in the roughness of the dentin surface. Material and method: Distal root of 6 mandibular molars were used. The roots were flatted with the aid of sandpaper and segmented, totaling 18 samples. The initial analysis was performed by using Dektak profilometer. Five areas were scanned per sample. Then, the samples were irrigated with NaOCl to simulate the chemomechanical preparation and washed with distilled water. The segments were divided into six groups according to the final flush protocol: Distilled water, 5.25% NaOCl, 2% chlorhexidine, 17% EDTA, 17% EDTA+ 5.25% NaOCl, 17% EDTA+ 2% chlorhexidine. Once again, in each sample, five areas were scanned, totaling 15 scans per group. Data were statistically analyzed using Kruskal - Wallis and Mann -Whitney tests (p<0.05). Result: Significant changes in roughness were found only in the association of the chelating agent with NaOCl. Conclusion: The final irrigation protocols have different effects on surface roughness of dentin.
Keywords
Referências
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