title: Preheating impact on the degree of conversion and water sorption/solubility of selected single-bottle adhesive systems.
abstract: OBJECTIVE
  This study evaluated the degree of conversion (DC) and the water sorption/solubility of preheated single-bottle adhesive systems.
  
  
  METHODS
  Five adhesive systems were tested: Adper Easy One and Adper Single Bond 2 (3M ESPE), Excite and Tetric N-Bond (Ivoclar/Vivadent), and XP Bond (Dentsply/Caulk). After storage for two hours at 25°C or 60°C, 50 samples (n=5) were prepared for all adhesive systems and stored dry in lightproof containers at 37°C for 24 hours. Fourier transform infrared/attenuated total reflectance spectroscopy was used to evaluate the DC, and water sorption/solubility was measured by means of mass loss and gain after water storage. The data were analyzed by two-way analysis of variance followed by Tukey's test (p<0.05).
  
  
  RESULTS
  Preheated adhesive systems showed statistically significantly higher DC than those kept at 25°C. Except for XP Bond, preheated adhesive systems presented statistically significantly lower water sorption/solubility means.
  
  
  CONCLUSIONS
  Preheating improved the DC for all tested adhesive systems. Also, it promoted a decrease of water sorption/solubility, except for the XP Bond adhesive system.
authors.forename: M R L
authors.initials: MR
authors.lastname: Vale
authors.forename: F A C
authors.initials: FA
authors.lastname: Afonso
authors.forename: B C D
authors.initials: BC
authors.lastname: Borges
authors.forename: A C
authors.initials: AC
authors.lastname: Freitas
authors.forename: A
authors.initials: A
authors.lastname: Farias-Neto
authors.forename: E O
authors.initials: EO
authors.lastname: Almeida
authors.forename: E J
authors.initials: EJ
authors.lastname: Souza-Junior
authors.forename: S
authors.initials: S
authors.lastname: Geraldeli
mesh_terms: D003738:Dental Cements; D006358:Hot Temperature; D012995:Solubility; D014867:Water / Q000737:chemistry*
chemical_list: D003738:Dental Cements; D014867:Water