Micro-shear bond strength of Er:YAG-laser-treated dentin |
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| Authors: | Rubens C. R. de Carvalho Patricia M. de Freitas Masayuki Otsuki Carlos P. de Eduardo Junji Tagami |
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| Affiliation: | 1.Department of Restorative Dentistry, School of Dentistry of S?o Paulo,University of S?o Paulo (USP),Sao Paulo,Brazil;2.Cariology and Operative Dentistry, Graduate School of Dentistry,Tokyo Medical and Dental University,Tokyo,Japan;3.Department of Restorative Sciences,Tokyo Medical and Dental University,Tokyo,Japan;4.Departamento de Dentística—Faculdade de Odontologia de S?o Paulo,USP,Sao Paulo,Brazil |
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| Abstract: | This study tested if dentin adhesion is affected by Er:YAG laser. Ninety dentin disks were divided in groups (n = 10): G1, control; G2, Er:YAG laser 150 mJ, 90 degrees contact, 38.8 J/cm(2); G3, Er:YAG laser 70 mJ, 90 degrees contact, 18.1 J/cm(2); G4, Er:YAG laser 150 mJ, 90 degrees non-contact, 1.44 J/cm(2); G5, Er:YAG laser 70 mJ, 90 degrees non-contact, 0.67 J/cm(2); G6, Er:YAG laser 150 mJ, 45 degrees contact, 37.5 J/cm(2); G7, Er:YAG laser 70 mJ, 45 degrees contact, 17.5 J/cm(2); G8, Er:YAG laser 150 mJ, 45 degrees non-contact, 1.55 J/cm(2); and G9, Er:YAG laser 70 mJ, 45 degrees non-contact, 0.72 J/cm(2). Bonding procedures were carried out and the micro-shear-bond strength (MSBS) test was performed. The adhesive surfaces were analyzed under SEM. Two-way ANOVA and multiple comparison tests revealed that MSBS was significantly influenced by the laser irradiation (p < 0.05). Mean values (MPa) of the MSBS test were: G1 (44.97 +/- 6.36), G2 (23.83 +/- 2.46), G3 (30.26 +/- 2.57), G4 (35.29 +/- 3.74), G5 (41.90 +/- 4.95), G6 (27.48 +/- 2.11), G7 (34.61 +/- 2.91), G8 (37.16 +/- 1.96), and G9 (41.74 +/- 1.60). It was concluded that the Er:YAG laser can constitute an alternative tool for dentin treatment before bonding procedures. |
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| Keywords: | Dentin Er:YAG laser Micro-shear bond strength Morphology Self-etching primers |
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