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Related Experiment Videos

Unprotected protein at the dentin-adhesive interface.

P Spencer1, J R Swafford

  • 1Department of Oral Biology, University of Missouri-Kansas City, School of Dentistry 64108, USA. SpencerP@umkc.edu

Quintessence International (Berlin, Germany : 1985)
|January 15, 2000
PubMed
Summary
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A new staining technique can identify exposed collagen at the dentin-adhesive interface, revealing potential vulnerabilities in dental restorations. This method helps detect weak bonds before clinical failure.

Area of Science:

  • Biomaterials science
  • Dental materials science
  • Adhesive dentistry

Background:

  • Acid etching in dental bonding can leave exposed collagen at the dentin-adhesive interface.
  • Degradation of exposed collagen by bacterial proteases may compromise the integrity of dental restorations.
  • A reliable method is needed to identify these vulnerable interfaces non-destructively.

Purpose of the Study:

  • To develop a nondestructive staining technique for identifying exposed collagenous protein at the dentin-adhesive interface.
  • To assess the efficacy of this technique in visualizing areas of inadequate adhesive penetration.

Main Methods:

  • Three dental adhesives (Scotchbond Multi-Purpose, Scotchbond Multi-Purpose Plus, 3M Single Bond) were applied to human dentin.
  • Light microscopic sections of dentin-adhesive interfaces were stained with Goldner's trichrome.

Related Experiment Videos

  • Scanning electron microscopy (SEM) was used for corollary examination.

    • Main Results:

    • Exposed protein was detected at the dentin-adhesive interface with all tested adhesives.
    • SEM confirmed the presence of exposed protein, identified as material removable by sodium hypochlorite.
    • Light microscopy effectively visualized exposed protein, while transmission electron microscopy obscured these sites.

    Conclusions:

    • The developed staining technique allows for in vitro identification of exposed collagen at the dentin-adhesive interface.
    • This method is crucial for identifying potential sites of premature breakdown in dental restorations.
    • Early detection of interface inadequacies can guide improvements in dental bonding systems.