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Influence of etching with erbium, chromium:yttrium–scandium–gallium–garnet laser on microleakage of class V restoration

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Abstract

The aim of this in vitro study was to evaluate some parameters of dental etching when irradiated with an erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser. One-hundred sound human third molars were selected and randomly distributed into ten groups (n = 10). The class V cavities of group 1 (control) were prepared with a bur and etched with 37% phosphoric acid, while groups G2 to G10, were prepared with laser (5 W, 88.46 J/cm2, 90/70% air/water) and etched with the following powers: G3 and G4, 0.25 W; G5 and G6, 0.5 W; G7 and G8, 0.75 W; G9 and G10, 1 W. Group G2 received no laser etching. Prior to restoration, G2, G4, G6, G8 and G10 received acid etching. After restoration, all samples were submitted to a microleakage test. According to statistical analysis (Kruskal–Wallis and Dunn’s tests), G10 presented the lowest microleakage values (P<0.05). The other groups showed no differences between them. Etching with Er,Cr:YSGG laser (1 W) followed by phosphoric acid was effective in reducing the microleakage of class V restorations.

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Acknowledgments

The authors would like to thank the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) for financial support (grant 98/14270-8) and Biolase for the interchange accomplished with the Laboratório Especial de Laser em Odontologia (LELO). This research was developed by the exchange between AALZ, University of Aachen (Germany) and LELO, University of São Paulo, Brazil.

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Authors and Affiliations

  1. Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil

    Juliana Marotti

  2. Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, 05508-000, SP, Brazil

    Juliana Marotti, Vinícius Rangel Geraldo-Martins, Marina Stella Bello-Silva & Carlos de Paula Eduardo

  3. Department of Conservative Dentistry, Periodontology and Preventive Dentistry, University Hospital of Aachen, Aachen, Germany

    Christian Apel & Norbert Gutknecht

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  1. Juliana Marotti
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  2. Vinícius Rangel Geraldo-Martins
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  3. Marina Stella Bello-Silva
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Correspondence to Juliana Marotti.

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Marotti, J., Geraldo-Martins, V.R., Bello-Silva, M.S. et al. Influence of etching with erbium, chromium:yttrium–scandium–gallium–garnet laser on microleakage of class V restoration. Lasers Med Sci 25, 325–329 (2010). https://doi.org/10.1007/s10103-008-0623-6

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  • DOI: https://doi.org/10.1007/s10103-008-0623-6

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