Dental and Medical Problems

Dent Med Probl
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Dental and Medical Problems

2017, vol. 54, nr 3, July-September, p. 253–258

doi: 10.17219/dmp/75873

Publication type: original article

Language: English

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Creative Commons BY-NC-ND 3.0 Open Access

Shear bond strength of pit and fissure sealants on permanent teeth after several etching protocols: In vitro study

Wytrzymałość na ścinanie laków szczelinowych w zębach stałych po zastosowaniu kilku protokołów wytrawiania – badania in vitro

Irina Mézquita-Rodrigo1,B,C,D,F, Rosalía Contreras-Bulnes1,A,B,C,D,E,F, Laura Emma Rodríguez-Vilchis1,A,B,C,D,E,F, Rogelio José Scougall-Vilchis1,A,C,E,F, Ulises Velazquez-Enriquez1,C,E,F, Claudia Centeno-Pedraza1,B,F

1 Dental and Advanced Studies Research Center, Faculty of Dentistry Autonomous Unversity State of Mexico, Toluca, Mexico

Abstract

Background. The pit and fissure areas are 8 times more vulnerable to caries; consequently, sealants have been proven to be efficient. Acid etching is the standard procedure for enamel etching; however, it leaves a demineralized surface. Laser Er:YAG is a good etching alternative due to its properties.
Objectives. The aim of this study was to evaluate the effect of different conditioning agents on shear bond strength (SBS) of sealants in permanent teeth.
Material and Methods. A total of 156 third molar samples were divided into 6 groups (n = 25 each). Treated as follows: GI acid etching (35% phosphoric acid), GII Er:YAG laser, GIII self-etching adhesive, GIV acid + Er:YAG laser, GV Er:YAG laser + acid and GVI Er:YAG laser + self-etching adhesive. Er:YAG laser irradiation was at 19.1 J/cm2, water spraying at 5.0 mL/min. Sealant blocks were made and bonded on the enamel with a sealant in order to perform SBS test and adhesive remnant index (ARI). Samples were stored (37°C, 24 h), tested, and statistically analyzed with a one way ANOVA, Kruskall-Wallis and Mann-Whitney U. SEM images were taken to assess the conditioning methods (n = 6).
Results. Er:YAG + self-etching group showed the lowest range. The highest values were observed in GI, GII and GIII, no significant differences were found among them. The largest amount of adhesive remnant was found in group V.
Conclusion. Phosphoric acid (35%), self-etching as well as 35% phosphoric acid + Er:YAG laser protocols showed a better shear bond strength for pit and fissure sealant adhesion. Er:YAG laser + self-etching protocol is not recommended for this procedure, due to the lack of adequate adhesive strength.

Key words

shear bond strength, pit and fissure sealants, several etching protocols DOI

Słowa kluczowe

wytrzymałość na ścinanie, laki szczelinowe, techniki wytrawiania szkliwa

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