Comparison of microshear bond strengths of four self-etching bonding systems to enamel using two test methods

Aust Dent J. 2006 Sep;51(3):252-7. doi: 10.1111/j.1834-7819.2006.tb00438.x.

Abstract

Background: Recent advances in enamel and dentine adhesive technology have resulted in the emergence of many new adhesive systems. Self-etching bonding systems do not require a separate etching step and the newest systems are the "all-in-one" systems which combine etching, priming and bonding into a single application. This study reports laboratory enamel microshear bond strengths of a self-etching priming and three all-in-one systems and also evaluates two different microshear bond test methods.

Methods: One hundred and nineteen enamel specimens were bonded (0.8 mm diameter) with either Clearfil Protect Bond (Kuraray), Xeno III (Dentsply), G Bond (GC) or One-Up Bond F (Tokuyama) using Palfique Estelite resin composite and stored in 37 degrees Celsius water for seven days. The microshear bond test method used either a blade or wire to apply the shear stress. Results were analysed with one-way ANOVA and post hoc (Tukey) multiple comparison analysis.

Results: Clearfil Protect Bond demonstrated higher and more consistent bond strengths than Xeno III, G Bond or One-Up Bond F. The wire method showed much greater reliability in results, with a coefficient of variation half that of the blade method.

Conclusions: All-in-one adhesives seem to be less reliable than the two-step self-etching priming adhesive when bonding to enamel. Test method can significantly affect results in the microshear bond test method.

Publication types

  • Comparative Study
  • Randomized Controlled Trial

MeSH terms

  • Acid Etching, Dental / methods*
  • Composite Resins / chemistry
  • Dental Bonding*
  • Dental Enamel / ultrastructure*
  • Dental Stress Analysis / instrumentation
  • Dentin-Bonding Agents / chemistry*
  • Humans
  • Materials Testing
  • Methacrylates / chemistry
  • Shear Strength
  • Stress, Mechanical
  • Temperature
  • Time Factors
  • Water / chemistry

Substances

  • Clearfil Protect Bond
  • Composite Resins
  • Dentin-Bonding Agents
  • G-Bond
  • Methacrylates
  • One-Up-Bond F
  • Xeno III
  • palfique estelite
  • Water