title: Comparative evaluation of bond strength of three contemporary self-etch adhesives: An ex vivo study.
abstract: OBJECTIVE
  This study evaluated the effect of 2-hydroxymethyl methacrylate (HEMA) and the type of solvent on the tensile bond strength of the following three self-etch adhesives: Adper easy one (HEMA-rich adhesive) which contained ethanol, G-Bond (HEMA-free adhesive) which contained acetone, and Xeno V (HEMA-free adhesive) which contained butanol as a solvent.
  
  
  METHODS
  Intact mandibular molars were mounted in self-cured resin and the occlusal surfaces were ground with # 600 SiC paper. Adhesives were applied on the prepared dentinal surfaces and the resin composite was condensed in the split brass mold (5 × 3 mm) placed over the adhesive surface. The specimens were stored in normal saline and placed in incubator at 37°C. After 24 hours, the specimens were tested in tensile mode at a crosshead speed of 1 mm/min. Statistical analysis was done using One way ANOVA and Tukey's HSD test.
  
  
  RESULTS
  The mean bond strengths of Adper easy one, G-Bond, and Xeno V were 12.41 MPa, 10.09 MPa, and 8.67 MPa, respectively.
  
  
  CONCLUSIONS
  Comparison of contemporary adhesives in this ex vivo study revealed that the ethanol-based HEMA-rich self-etch adhesive is better than HEMA-free self-etch adhesive that contained acetone and butanol as the solvents, when compared in terms of bond strength.
authors.affiliation: Department of Conservative and Endodontics, Subharti Dental College, Meerut, India.
authors.forename: Vineeta
authors.initials: V
authors.lastname: Nikhil
authors.forename: Vijay
authors.initials: V
authors.lastname: Singh
authors.forename: Suruchi
authors.initials: S
authors.lastname: Chaudhry