title: "Evaluation of shear bond strength of a composite resin to white mineral trioxide aggregate with three different bonding systems"-An in vitro analysis.
abstract: BACKGROUND
  Mineral trioxide aggregate (MTA) is a biomaterial that has been investigated for endodontic applications. With the increased use of MTA in pulp capping, pulpotomy, perforation repair, apexification and obturation, the material that would be placed over MTA as a final restoration is an important matter. As composite resins are one of the most widely used final restorative materials, this study was conducted to evaluate the shear bond strength of a composite resin to white mineral trioxide aggregate (WMTA) using three different bonding systems namely the two-step etch and rinse adhesive, the self-etching primer and the All-in-one system.
  
  
  METHODS
  Forty five specimens of white MTA (Angelus) were prepared and randomly divided into three groups of 15 specimens each depending on the bonding systems used respectively. In Group A, a Two-step etch and rinse adhesive or 'total-etch adhesive', Adper Single Bond 2 (3M/ESPE) and Filtek Z350 (3M ESPE, St Paul, MN) were placed over WMTA. In group B, a Two-step self-etching primer system, Clearfil SE Bond (Kuraray, Medical Inc) and Filtek Z350 were used. In Group C, an All-in-one system, G Bond (GC corporation, Tokyo, Japan) and Filtek Z350 were used. The shear bond strength was measured for all the specimens. The data obtained was subjected to One way Analysis of Variance (ANOVA) and Scheffe's post hoc test.
  
  
  RESULTS
  The results suggested that the Two-step etch and rinse adhesive when used to bond a composite resin to white MTA gave better bond strength values and the All-in-one exhibited the least bond strength values.
  
  
  CONCLUSIONS
  The placement of composite used with a Two-step etch and rinse adhesive over WMTA as a final restoration may be appropriate.
  
  
  BACKGROUND
  Composite resins, dentin bonding agents, mineral trioxide aggregate, shear bond strength.
authors.affiliation: MDS. Conservative Dentistry and Endodontics.
authors.forename: Sandhya
authors.initials: S
authors.lastname: Yelamali
authors.affiliation: MDS. Conservative Dentistry and Endodontics.
authors.forename: Anand C
authors.initials: AC
authors.lastname: Patil