title: Effect of different evaporation periods on microtensile bond strength of an acetone-based adhesive to dentin.
abstract: OBJECTIVE
  Solvent content of a contemporary dental adhesive affect the bonding process, especially in the case of acetone based adhesives. The aim of this study was to evaluate the effect of different air-drying periods on microtensile bond strength (MTBS) of a total-etch adhesive to dentin.
  
  
  METHODS
  Prime & Bond NT (Dentsply-USA) was used with different air-drying periods (0, 2, 5, 10, 30sec) for bonding a composite resin to prepared dentin. The specimens were then subjected to a tensile force until fracture and the MTBSs of the samples were recorded. Failure modes of the fractured samples were also determined using stereomicroscope and scanning electron microscopy. Data were analyzed using ANOVA and Bonferroni tests (P = 0.05).
  
  
  RESULTS
  With increasing the air-drying periods, the MTBSs were increased until the 5 second air-blowing; after that, with increasing the air-drying periods, the MTBSs decreased. Both, the most complicated failure and the strongest bond were seen in the 5 sec air-drying group.
  
  
  CONCLUSIONS
  There is an optimum air-drying time for acetone based adhesives which results in the strongest bond to dentin.
authors.affiliation: Department of Operative Dentistry, Member of Social Determinants of Oral Health Research Center, Dental School, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
authors.forename: Abdolrahim
authors.initials: A
authors.lastname: Davari
authors.forename: Majid
authors.initials: M
authors.lastname: Mousvinasab
authors.forename: Alireza Danesh
authors.initials: AD
authors.lastname: Kazemi
authors.forename: Reza
authors.initials: R
authors.lastname: Rouzbeh
mesh_terms: D000096:Acetone / Q000737:chemistry*; D000134:Acid Etching, Dental; D003188:Composite Resins / Q000737:chemistry*; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011109:Polymethacrylic Acids / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D000096:Acetone