title: Effect of 3-year water storage on the performance of one-step self-etch adhesives applied actively on dentine.
abstract: OBJECTIVE
  To evaluate the effect of the application method on the immediate and 3-year resin-dentine bond strength (μTBS) and nanoleakage (NL) for 3 one-step self-etch adhesives (Adper Prompt L-Pop; Clearfil S(3) Bond and Xeno III).
  
  
  METHODS
  The occlusal enamel of 42 human molars were removed to expose a flat dentine surface. The adhesives were applied under inactive or active application. After light-curing (600mW/cm(2) for 10s), composite buildups were constructed incrementally and sectioned to obtain bonded sticks (0.8mm(2)) to be tested in tension immediately or after 3 years of water storage of water storage. For NL, 2 bonded sticks from each tooth at each time were coated with nail varnish, placed in silver nitrate and polished down with SiC paper. The μTBS data was submitted to a two-way repetead mesures ANOVA and Tukey's test for each adhesive (α=0.05).
  
  
  RESULTS
  The active application showed higher immediate and 3-year μTBS than the inactive application (p<0.05). An increase in the silver nitrate deposition was seen for all conditions after 3 years; however this was more pronounced for all materials under inactive application (p<0.05).
  
  
  CONCLUSIONS
  The active application improves the immediate bonding performance of the adhesive systems. Reductions of the bond strength were observed for all materials after 3 years, however reduced degradation rate was observed when the materials are applied actively in dentine.
authors: School of Dentistry, State University of Ponta Grossa, Paraná, Brazil. aloguercio@hotmail.com
authors: Alessandro Dourado
authors: AD
authors: Loguercio
authors: Rodrigo
authors: R
authors: Stanislawczuk
authors: Alexandra
authors: A
authors: Mena-Serrano
authors: Alessandra
authors: A
authors: Reis
mesh_terms: D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification; D003764:Dental Materials / Q000737:chemistry; D003775:Dental Polishing / Q000379:methods; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D055115:Light-Curing of Dental Adhesives / Q000379:methods; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry; D017655:Silicon Compounds / Q000737:chemistry; D016622:Silver Staining; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D017554:Carbon Compounds, Inorganic; C505694:Clearfil S3 Bond; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C408584:Prompt L-Pop; D019279:Resin Cements; D017655:Silicon Compounds; C487957:Xeno III; D014867:Water; C022088:silicon carbide