13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

-  Poster 47

TITLE: The Effects of Er,Cr:YSSG Enamel Surface Treatment on the Microleakage of a Fissure Sealant, an in-vitro Study.

AUTHORS: Rafieian N, Rezaei-Soufi L, Fekrazad R, Jazaeri M.

Dental Faculty of Hamadan Univercity of Medical Sciences

SOURCE: Med Oral Patol Oral Cir Bucal. 2012 May 1;17(Supplement1):S195.

* doi:10.4317/medoral.17643695

http://dx.doi.org/10.4317/medoral.17643695

Abstract

Introduction: Microleakage Reduction of fissure sealant is an important factor for their success. Aim: The aim of this in-vitro study was to evaluate the effects of Er,Cr:YSSG enamel surface treatment on the microleakage of a fissure sealant on microleakage prevention. Materials and Methods: Sixty caries-free human premolar teeth were randomly placed in three groups according to the enamel surface treatment as follows: (1) etching with 35% phosphoric acid gel for 30 seconds; (2) Er,Cr:YSSG laser irradiation (1.5 W, 2.49 μm, 20 Hz) for 40 seconds + applying a self-etch adhesive; and (3) Er,Cr:YSSG laser (similar to group 2) + applying Margin Bond. After the surface treatment, sealant was applied to occlusal fissures. The samples were thermocycled and immersed in a 0.5% basic fuchsin solution for 24 h. Microleakage was evaluated by stereomicroscope at 6x magnification and scored as: 0 (no dye penetration); 1 (dye penetration restricted to the outer half of the sealant); 2 (dye penetration restricted to the inner half of the sealant); 3 (dye penetration into the underlying fissure). Statistical analysis was performed with Kruskal-Wallis and Mann-Whitney U tests.

Results: No dye penetration was perceived in 20%, 15%, and 0% of cases in groups 1, 2, and 3 respectively. Score 3 detected only in group 3. Although, there was no statistically significant difference of microleakage scores between groups 1 and 2 (p=0.976), Mean microleakage scores of group 1 and 2 were significantly lower than group 3 (p<0.05). Conclusion: Findings of this study showed that Er,Cr:YSSG laser conditioning in conjunction with an self-etch adhesive reduces microleakage.