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Evaluation of adhesive systems using acidic primers

V V Gordan1, M A Vargas, D S Cobb

  • 1University of Florida, College of Dentistry, Department of Operative Dentistry, Gainesville 32610-0415, USA.

American Journal of Dentistry
|April 2, 1998
PubMed
Summary

The study found that the Denthesive II (DTII) system with etching and Clearfil Liner Bond 2 (CLB2) without etching showed superior enamel bond strength. For dentin, CLB2 with or without etching outperformed DTII without etching.

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Area of Science:

  • Dental Materials Science
  • Adhesive Dentistry
  • Biomaterials Research

Background:

  • Acidic primers in dental adhesives aim to improve bonding to tooth structure.
  • Understanding the impact of etching on bond strength with acidic primer systems is crucial for clinical success.
  • Variations in adhesive system composition can influence dentin and enamel shear bond strength.

Purpose of the Study:

  • To compare the in vitro shear bond strength of two acidic primer adhesive systems (Clearfil Liner Bond 2 and Denthesive II) on enamel and dentin.
  • To evaluate the effect of etching versus no etching when using these acidic primer systems.
  • To assess Scotchbond Multi-Purpose as a control for comparison.

Main Methods:

  • Two acidic primer systems, Clearfil Liner Bond 2 (CLB2) and Denthesive II (DTII), were tested with and without etching (ETCH, NOET).

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  • Scotchbond Multi-Purpose (SBMP) served as the control group, utilizing etching.
  • Shear bond strength was measured after thermocycling 500 times on prepared human molar enamel and dentin surfaces bonded with Silux Plus composite.

    • Main Results:

    • Significant differences in enamel shear bond strength were observed among the groups (P = 0.0001).
    • Denthesive II with etching (DTII-ETCH) and Clearfil Liner Bond 2 without etching (CLB2-NOET) demonstrated the highest enamel bond strengths, surpassing CLB2-ETCH, SBMP, and DTII-NOET.
    • For dentin, both CLB2-ETCH and CLB2-NOET showed significantly greater bond strengths compared to DTII-NOET.

    Conclusions:

    • The effectiveness of acidic primers in dental adhesives is influenced by the presence or absence of etching, varying between enamel and dentin.
    • Specific combinations of acidic primer systems and etching protocols can yield superior bond strengths.
    • Further research may explore the long-term clinical performance of these adhesive systems.