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Erbium, chromium:yttrium scandium gallium garnet laser for caries removal: influence on bonding of a self-etching adhesive system

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Abstract

This study evaluated the influence of the dental substrates obtained after the use of different caries removal techniques on bonding of a self-etching system. Forty, extracted, carious, human molars were ground to expose flat surfaces containing caries-infected dentine surrounded by sound dentine. The caries lesions of the specimens were removed or not (control—G1) either by round steel burs and water-cooled, low speed, handpiece (G2), or by irradiation with an erbium, chromium:yttrium scandium gallium garnet (Er,Cr:YSGG) laser (2W, 20 Hz, 35.38 J/cm2, fiber G4 handpiece with 0.2826 mm2, non-contact mode at a 2 mm distance, 70% air/20% water—G3) or using a chemo-mechanical method (Carisolv—G4). Caries-infected, caries-affected and sound dentines were submitted to a bonding system followed by construction of a resin-based composite crown. Hour-glass shaped samples were obtained and submitted to a micro-tensile bond test. The bond strength data were compared by analysis of variance (ANOVA), complemented by Tukey’s test (P ≤ 0.05). The samples of sound dentine presented higher bond strengths than did samples of caries-affected dentine, except for the groups treated with the Er,Cr:YSGG laser. The highest bond strengths were observed with the sound dentine treated with burs and Carisolv. The bond strengths to caries-affected dentine were similar in all groups. Additionally, bonding to caries-affected dentine of the Er,Cr:YSGG laser and Carisolv groups was similar to bonding to caries-infected dentine. Thus, caries-affected dentine is not an adequate substrate for adhesion. Moreover, amongst the caries removal methods tested, the Er,Cr:YSGG laser irradiation was the poorest in providing a substrate for bonding with the tested self-etching system.

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Acknowledgments

This work was carried out at Faculdade de Odontologia da Universidade de São Paulo (USP) and Instituto de Matemática e Estatística (IME- USP), São Paulo, Brazil and was supported, in part, by grants: 03/12182-4 FAPESP and 98/14270-B CEPID/FAPESP, Brazil.

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Authors and Affiliations

  1. Departamento de Dentística, Faculdade de Odontologia, Universidade de São Paulo (USP), Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, 05508-000, SP, Brazil

    Arlene Tachibana, Márcia Martins Marques & Adriana Bona Matos

  2. Departamento de Estatística, Instituto de Matemática e Estatística, Universidade de São Paulo (USP), Rua do Matão, 1010 – Cicade Universitária, São Paulo, 05508-090, SP, Brazil

    Julia Maria Pavan Soler

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  1. Arlene Tachibana
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  2. Márcia Martins Marques
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  3. Julia Maria Pavan Soler
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  4. Adriana Bona Matos
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Correspondence to Adriana Bona Matos.

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Tachibana, A., Marques, M.M., Soler, J.M.P. et al. Erbium, chromium:yttrium scandium gallium garnet laser for caries removal: influence on bonding of a self-etching adhesive system. Lasers Med Sci 23, 435–441 (2008). https://doi.org/10.1007/s10103-007-0503-5

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  • DOI: https://doi.org/10.1007/s10103-007-0503-5

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