title: Solvent retention of contemporary commercial dentin bonding agents in a demineralized dentin matrix.
abstract: OBJECTIVE
  Solvents are ingredients in dentin-bonding agents (DBAs) that are essential to obtain efficient adhesion to dentin under wet-technique bonding protocol. However, an excess of solvents can compromise bonding durability. This study aimed to assess the retention of solvents present in different DBAs after their application to a demineralized dentin matrix.
  
  
  METHODS
  Thirty-six specimens of bovine dentin were demineralized for 7 days in 0.5M EDTA and divided into six groups n=6 (Scotchbond primer, Adper Single Bond 2, Excite, AdheSE primer, Prime & Bond NT and Xeno III). These specimens were individually saturated by the systems for 5 min and then kept in vials protected against light exposure. Each specimen was measured using a digital balance and then measured at the following intervals 10, 20, 30 sec, 1, 2 and 5 min thereafter. Data were analyzed by two-way ANOVA and Tukey tests (alfa=.05).
  
  
  RESULTS
  There were significant differences evident in Excite, Prime & Bond NT at 2 and 5 min, respectively. There was no significant interaction between materials and time in all experimented time evaluated. The amount of solvent spontaneously evaporated was limited even in acetone-based specimens.
  
  
  CONCLUSIONS
  After DBAs are applied, professionals may facilitate their evaporation, since spontaneous evaporation is limited.
authors.affiliation: Restorative Dentistry of University North of Paraná - UNOPAR, Londrina, PR, Brazil.
authors.forename: Georges
authors.initials: G
authors.lastname: Garcia
authors.forename: Karen Barros Parron
authors.initials: KB
authors.lastname: Fernandes
authors.forename: Fernanda Cristina Pimentel
authors.initials: FC
authors.lastname: Garcia
authors.forename: Paulo Henrique Perlatti
authors.initials: PH
authors.lastname: D'Alpino
authors.forename: Nádia
authors.initials: N
authors.lastname: da Rocha Svizero
authors.forename: Linda
authors.initials: L
authors.lastname: Wang