title: Does hybridized dentin affect bond strength of self-adhesive resin cement?
abstract: BACKGROUND
  Evaluate the influence of different hybridization bonding techniques of a self-adhesive resin cement.
  
  
  METHODS
  30 human health molars were divided into six groups (n=10). The specimens received three longitudinal sections, allowing insertion of central cuts in PVC matrices. Each group received a different dentin pretreatment according to the manufacturer's recommendations, except the control group (G1), as follows. G2 - a 3-step total-etch adhesive system (Optibond™ FL, Kerr); G3 - a 3-step total-etch adhesive system (Adper™ Scotchbond™ Multi-Purpose, 3M ESPE); G4 - a 2-step total-etch adhesive system (Adper™ Single Bond 2, 3M ESPE); G5 - a single-step self-etching system (Bond Force, Tokuyama); and G6 - universal bonding system (Single Bond Universal, 3M ESPE). Then, cylinders made of self-adhesive resin cement with polypropylene matrix was cemented in all groups (RelyX U200, 3M ESPE). Bond strength was assessed by submitting the specimens to micro-shear test and was characterized according to the fracture pattern observed through optical microscopy.
  
  
  RESULTS
  The results were submitted to the Kruskal-Wallis test, which indicated a statistically significant difference between the groups (p=0.04), and Tukey's multiple comparisons, which indicated a statistically significant difference between G1 and G3 (p<0.05). The microscopic analysis revealed a high prevalence of adhesive failures, followed by mixed fractures, and cohesive failures in the dentin.
  
  
  CONCLUSIONS
  The use of a previous dentin hybridization protocol is able to increase adhesive bonding resistance of self-adhesive resin cement, especially when used Adper™ Scotchbond™ Multi-Purpose system.Key words:Bonding, self-adhesive resin cement, adhesive systems, microshear.
authors.affiliation: DDS, MSc, Program of Health Science, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil.
authors.forename: Saulo
authors.initials: S
authors.lastname: Pamato
authors.affiliation: DDS, PhD, Department of Prosthodontics, University of São Paulo, Bauru, São Paulo, Brazil.
authors.forename: Accácio-Lins
authors.initials: AL
authors.lastname: do Valle
authors.affiliation: DDS, MSc, Department of Prosthodontics, University of São Paulo, Bauru, São Paulo, Brazil.
authors.forename: Gustavo-Henrique-Barbosa
authors.initials: GH
authors.lastname: de Andrade
authors.affiliation: DDS, MSc, Department of Prosthodontics, University of São Paulo, Bauru, São Paulo, Brazil.
authors.forename: Hugo-Alberto
authors.initials: HA
authors.lastname: Vidotti
authors.affiliation: DDS, PhD, Department of Endodontic, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande de Sul, Brazil.
authors.forename: Marcus-Vinícius-Reis
authors.initials: MV
authors.lastname: Só
authors.affiliation: DDS, PhD, Program of Health Science, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil.
authors.forename: Jefferson-Ricardo
authors.initials: JR
authors.lastname: Pereira