Efecto de la activación de un protocolo de irrigación con el láser (ER, CR: YSGG), sobre la microdureza de la dentina radicular

Abstract

Objective: The purpose of this study was to determine the effect of the activation of an irrigation protocol with the Erbium Chromium: itrio-scamdium-garnet-gallium (ErCr:YSGG) laser on the microhardness of root canal dentin. Method: 23 teeth unirradicular were extracted and longitudinally divided in 46 halves analyzed with Vickers hardness. Group 1: irrigation with saline solution. Group 2,3,4 were irrigated and activated at 2mm working length for 60 sec, later inactivated with distilled water and irrigated with 17% EDTA. Group 2: 5,25% NaOCl and sonic activation (Endoactivator), Group 3: 5,25% NaOCl and ultrasonic activation , Group 4: 5,25% NaOCl and activation with ErCr:YSGG laser with constant cooling. An ANOVA test with a statistical significance of 95% was used. Results: Significant differences were found in the microhardness of the root dentin between the experimental groups and the saline solution group. The difference between the activation groups was nor observed. A difference was found in the medians between the experimental groups, being qualitatively significant in the coronal third. Conclusion: Activation of sodium hypochlorite at 5,25% using different methods of agitation showed a decrease in the microhardness of root canal dentin, being the ErCr:YSGG laser safe for use in activation under the parameters used.