title: Evaluation of micro-shear bond strength of resin modified glass-ionomer to composite resins using various bonding systems.
abstract: OBJECTIVE
  The aim was to compare the micro-shear bond strength between composite and resin-modified glass-ionomer (RMGI) by different adhesive systems.
  
  
  METHODS
  A total of 16 discs of RMGI with a diameter of 15 mm and a thickness of 2 mm were randomly divided into four groups (n = 4). Four cylinders of composite resin (z250) were bonded to the RMGI discs with Single Bond, Clearfil SE Bond and Clearfil S3 Bond in Groups 1-3, respectively. The fourth group was the control. Samples were tested by a mechanical testing machine with a strain rate of 0.5 mm/min. Failure mode was assessed under a stereo-microscope.
  
  
  RESULTS
  The means of micro-shear bond strength values for Groups 1-4 were 14.45, 23.49, 16.23 and 5.46 MPa, respectively. Using a bonding agent significantly increased micro-shear bond strength (P = 0.0001).
  
  
  CONCLUSIONS
  Micro-shear bond strength of RMGI to composite increased significantly with the use of adhesive resin. The bond strength of RMGI to composite resin could vary depending upon the type of adhesive system used.
authors.affiliation: Department of Operative Dentistry, Dental Research Center, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Shahin
authors.initials: S
authors.lastname: Kasraie
authors.affiliation: Department of Operative Dentistry, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Mohadese
authors.initials: M
authors.lastname: Shokripour
authors.affiliation: Department of Operative Dentistry, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Mahin
authors.initials: M
authors.lastname: Safari
keywords: Composite resins; clearfil se bond; dentin bonding agent; glass-ionomer; single bond