title: Solvent type influences bond strength to air or blot-dried dentin.
abstract: BACKGROUND
  Air-drying of etched and rinsed dentin surface may force the exposed collagen fibrils to collapse. Blot-drying is an alternative method to wipe the excess water from the dentin surface without compromising the monomer penetration. Contemporary total etch adhesives contain ethanol/water or acetone as solvent in which resin monomers are dissolved. Solvent type of the adhesive system has an important role in bonding to dentin. An adhesive containing tertiary butanol as an alternative solvent has been in the market. Purpose of this study is to determine the shear bond strengths of three total-etch adhesives with different solvents (acetone, ethanol or tertiary butanol) applied to air or blot dried moist dentin.
  
  
  METHODS
  Sixty extracted non-carious human third molars were divided into three main groups according to solvent content of the adhesives [acetone based - One Step (OS, Bisco, IL, USA); ethanol/water based - Optibond Solo Plus (OB, Kerr, CA, USA); and tertiary butanol based - XP Bond (XP, Caulk/Dentsply, DE, USA)]. Each main group was divided into two groups according to drying methods (blot or air) (n = 10). Shear bond strengths (SBS) were measured. Data were analyzed by Student's t test and Tukey HSD test (p < 0,05).
  
  
  RESULTS
  XP showed highest SBS values in both drying methods applied (p < 0.05). Drying method did not influence the SBS in OS and OB (p > 0.05). XP-blot produced significantly higher SBS than XP-air (p < 0.05).
  
  
  CONCLUSIONS
  Tertiary butanol based adhesive showed higher bond strength values than ethanol or acetone based adhesives. Blot drying of dentin improved the bond strength values of tertiary butanol based adhesive. Further research is necessary to determine in vivo and in vitro performance of tertiary butanol based adhesives.
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Eskişehir Osmangazi University, 26480, Eskişehir, Turkey. zgrrmk@gmail.com.
authors.forename: Özgür
authors.initials: Ö
authors.lastname: Irmak
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, 06500, Ankara, Turkey.
authors.forename: İsmail Hakkı
authors.initials: İH
authors.lastname: Baltacıoğlu
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Near East University, Near East Boulevard, ZIP: 99138, Nicosia/TRNC Mersin 10, Turkey.
authors.forename: Nuran
authors.initials: N
authors.lastname: Ulusoy
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, 06500, Ankara, Turkey.
authors.forename: Yıldırım Hakan
authors.initials: YH
authors.lastname: Bağış
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D003738:Dental Cements; D003804:Dentin; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D019279:Resin Cements; D033081:Shear Strength; D012997:Solvents / Q000737:chemistry*; D013718:Tensile Strength; D014867:Water
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D008689:Methacrylates; D019279:Resin Cements; D012997:Solvents; D014867:Water
keywords: Adhesive; Blot drying; Shear bond strength; Solvent; Tertiary butanol