Abstract

RACHED JUNIOR, Fuad Jacob Abi; SOUZA-GABRIEL, Aline Evangelista; SOUSA-NETO, Manoel Damião  and  SILVA-SOUSA, Yara Teresinha Correa. Bond strength of endodontic sealers after intracanal surface pretreatment with CO₂ laser. RSBO (Online) [online]. 2012, vol.9, n.3, pp. 298-302. ISSN 1984-5685.

Introduction: The aim of this study was to evaluate in vitro the bonding of AH Plus and Endofill sealers to intraradicular canal walls after different dentin surface treatments. Material and methods: Sixty canines were sectioned obtaining dentin discs with 4-mm thickness and were embedded in acrylic resin. The canals were prepared with diamond burs. The specimens were divided into two groups (n = 30): GI - AH Plus and GII - Endofill and were subdivided into three groups based on the dentin surface treatment (n = 10): A - distilled and deionized water (control), B - 17% EDTA, C - CO₂ laser with 3W in continuous mode for 10s. The specimens were submitted to push out test in a universal testing machine. Results: Tukey test revealed that the IB (AH Plus/17% EDTA) (17.59 ± 6.04) and IC (AH Plus/CO2 laser) (21.69 ± 4.93) subgroups had the highest values, which were statistically similar between each other (p > 0.05) and different from the other subgroups (p < 0.05). IIC subgroup (Endofill/CO2 laser) (7.25 ± 1.59) had intermediate values, which were statistically similar to (p > 0.05) IA subgroup (AH Plus/water) (10.99 ± 2.63), IIA subgroup (Endofill/water) (3.16 ± 0.83) and IIB subgroup (Endofill/ 17% EDTA) (5.31 ± 3.61), which had the smallest values (p < 0.05). Conclusion: The treatment of superficial intracanal dentin with CO₂ laser and EDTA favored the adhesion of AH Plus and Endofill sealers.

Keywords : adhesion; sealers; Endodontics; CO₂ laser..