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Related Experiment Videos

Bonding to caries-affected dentin using self-etching primers.

M Nakajima1, M Ogata, M Okuda

  • 1Department of Operative Dentistry, Tokyo Medical and Denal University, Japan.

American Journal of Dentistry
|June 13, 2000
PubMed
Summary
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Resin bond strengths to caries-affected dentin were higher with two self-etching primer systems than normal dentin. Hybrid layers were thicker on caries-affected dentin, indicating improved adhesion.

Area of Science:

  • Dental Materials Science
  • Adhesive Dentistry

Background:

  • Caries-affected dentin presents unique challenges for dental adhesive bonding.
  • Understanding resin-dentin bond strengths is crucial for restorative success.

Purpose of the Study:

  • To compare resin bond strengths to caries-affected versus normal dentin.
  • To evaluate three self-etching primer adhesive systems for their performance on different dentin substrates.

Main Methods:

  • Three self-etching primer systems (Clearfil Liner Bond 2, Clearfil Liner Bond 2V, A.R.T. Bond) were used to bond caries-affected and normal dentin.
  • Tensile bond strength testing was performed on hourglass-shaped specimens.
  • Scanning Electron Microscopy (SEM) examined hybrid layer formation.

Main Results:

Related Experiment Videos

  • Clearfil Liner Bond 2 and Clearfil Liner Bond 2V showed significantly higher bond strengths to caries-affected dentin compared to normal dentin.
  • A.R.T. Bond exhibited no significant difference in bond strength between the two dentin types.
  • Hybrid layers were approximately twice as thick on caries-affected dentin for all tested systems.

Conclusions:

  • Self-etching primer systems demonstrate variable bond strengths depending on dentin substrate.
  • Thicker hybrid layers on caries-affected dentin may contribute to enhanced resin-dentin adhesion.