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Related Experiment Videos

Effects of self-etching primers on dentin.

A Inagaki, H Chigira, K Itoh

    Dental Materials : Official Publication of the Academy of Dental Materials
    |November 1, 1989
    PubMed
    Summary

    Self-etching dentin primers affect dentin hardness. Experimental primers containing Methacryloxyethyl succinate (MES) and Methacryloxyethyl phthalate (MEP) showed less dentin softening compared to maleic acid or commercial primers.

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    Area of Science:

    • Dental Materials Science
    • Biomaterials Engineering
    • Adhesive Dentistry

    Background:

    • Dentin hardness is crucial for the longevity of dental restorations.
    • Self-etching dentin primers are widely used in adhesive dentistry.
    • Understanding primer effects on dentin is essential for material development.

    Purpose of the Study:

    • To evaluate the impact of self-etching dentin primers on dentin hardness.
    • To compare the softening effects of experimental primers with a commercial product.
    • To investigate correlations between primer pH, dentin hardness, and resin polymerization contraction.

    Main Methods:

    • Vickers hardness testing was performed on untreated and primer-treated dentin.
    • Experimental primers were formulated using dicarbonates/esters and HEMA at 5% and 35% concentrations.
    • Commercial dentin primer (Scotchprep, 3M) and maleic acid-HEMA mixtures were used for comparison.

    Main Results:

    • Experimental primers MES and MEP caused less dentin softening than maleic acid or Scotchprep.
    • A strong correlation was found between primer pH and the resulting dentin hardness.
    • Dentin hardness correlated with the polymerization contraction of a light-curing resin (Silux, 3M).

    Conclusions:

    • Specific experimental self-etching primers (MES, MEP) demonstrate reduced dentin softening potential.
    • Primer pH is a significant factor influencing dentin hardness post-treatment.
    • Dentin hardness may impact the performance of overlying dental composites.

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