title: Effects of simplified ethanol-wet bonding technique on immediate bond strength with normal versus caries-affected dentin.
abstract: OBJECTIVE
  The aim of the present study was to evaluate whether the use of simplified ethanol-wet bonding (EWB) technique improved the immediate microtensile bond strength (μTBS) between resin composite and caries-affected dentin (CAD).
  
  
  METHODS
  Twenty-four extracted carious human permanent molars were sectioned to expose the carious lesion. The carious dentin was excavated until CAD was exposed. The samples were divided into two groups: water-wet bonding with Adper Scotchbond Multi-Purpose and a simplified EWB (three 100% ethanol applications for 30 s each), followed by application of an experimental hydrophobic primer and restoration. The samples were vertically sectioned to produce 1 mm × 1 mm thick slabs. The normal dentin (ND) slabs and CAD slabs were identified and were subjected to μTBS evaluation. Slabs from four teeth (two from each group) were evaluated under microscope. Data were analyzed using two-way ANOVA and post hoc Holm-Sidak test at P < 0.05.
  
  
  RESULTS
  EWB improved the μTBS in ND but not in CAD group. The dentinal tubules in CAD group showed sclerotic activity with minimal or no hybrid layer.
  
  
  CONCLUSIONS
  Simplified ethanol bonding does not improve the bond strength in CAD.
authors.affiliation: Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India.
authors.forename: Vivek
authors.initials: V
authors.lastname: Aggarwal
authors.affiliation: Department of Conservative Dentistry and Endodontics, SGT Dental College, Gurgaon, Haryana, India.
authors.forename: Mamta
authors.initials: M
authors.lastname: Singla
authors.affiliation: Department of Conservative Dentistry and Endodontics, SGT Dental College, Gurgaon, Haryana, India.
authors.forename: Ritu
authors.initials: R
authors.lastname: Sharma
authors.affiliation: Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Miglani
authors.affiliation: Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India.
authors.forename: Saranjit Singh
authors.initials: SS
authors.lastname: Bhasin
keywords: Caries-affected dentin; ethanol-wet bonding; hybrid layer; microtensile bond strength; water-wet bonding