title: Diode laser irradiation increases microtensile bond strength of dentin.
abstract: Laser irradiation after the immediate application of dentin bonding systems (DBSs) and prior to their polymerization has been proposed to increase bond strength. The objective of this study was to evaluate the effect of diode laser irradiation (λ = 970 nm) on simplified DBSs through microtensile bond strength tests. Forty healthy human molars were randomly distributed among four groups (n = 10) according to DBSs used [Adper™ SingleBond 2 (SB) and Adper™ EasyOne (EO)], and the respective groups were irradiated with a diode laser (SB-L and EO-L). After bonding procedures and composite resin build-ups, teeth were stored in deionized water for 7 days and then sectioned to obtain stick-shaped specimens (1.0 mm2). The microtensile test was performed at 0.5 mm/min, yielding bond strength values in MPa, which were evaluated by two-way ANOVA followed by Tukey's test (p < 0.05) for individual comparisons. For both adhesive systems, diode laser irradiation promoted significant increases in bond strength values (SB: 33.49 ± 6.77; SB-L: 43.69 ± 8.15; EO: 19.67 ± 5.86; EO-L: 29.87 ± 6.98). These results suggest that diode laser irradiation is a promising technique for achieving better performance of adhesive systems on dentin.
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Rafael Massunari
authors.initials: RM
authors.lastname: Maenosono
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Odair
authors.initials: O
authors.lastname: Bim Júnior
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Marco Antonio Húngaro
authors.initials: MA
authors.lastname: Duarte
authors.affiliation: Department of Restorative Dentistry, Ribeirão Preto School of Dentistry, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Regina Guenka
authors.initials: RG
authors.lastname: Palma-Dibb
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Linda
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Sérgio Kiyoshi
authors.initials: SK
authors.lastname: Ishikiriama
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods; D003738:Dental Cements / Q000737:chemistry*; D003804:Dentin / Q000528:radiation effects*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D054023:Lasers, Semiconductor / Q000627:therapeutic use*; D008422:Materials Testing; D008488:Medical Illustration; D011897:Random Allocation; D012016:Reference Values; D015203:Reproducibility of Results; D013499:Surface Properties / Q000187:drug effects; D013718:Tensile Strength / Q000528:radiation effects; D013997:Time Factors
chemical_list: C554641:Adper single bond 2; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents