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Related Experiment Videos

Effect of primers on bonding agent polymerization

M Hotta1, K Kondoh, H Kamemizu

  • 1Department of Endodontics & Operative Dentistry, School of Dentistry, Asahi University, Gifu, Japan.

Journal of Oral Rehabilitation
|November 5, 1998
PubMed
Summary

Primers can negatively impact dental bonding agents, reducing polymerization and mechanical strength. Omitting primers generally improves the tensile bond strength of adhesives to glass-ceramic and enamel.

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Area of Science:

  • Dental Materials Science
  • Polymer Chemistry
  • Biomaterials Engineering

Background:

  • Primers are often used in dental bonding systems to improve adhesion.
  • The effect of primers on the polymerization kinetics and mechanical properties of bonding agents requires further investigation.

Purpose of the Study:

  • To evaluate the influence of primers on the polymerization and mechanical properties of dental bonding agents.
  • To assess the impact of primer concentration and visible-light curing time on bonding agent performance.
  • To determine the effect of primer treatment on the tensile bond strength to micacious glass-ceramic and human enamel.

Main Methods:

  • Assessed degree of conversion (radical production) and mechanical properties (Knoop hardness, direct tensile strength) of adhesive/primer mixtures.

Related Experiment Videos

  • Measured tensile bond strength of adhesive resin to micacious glass-ceramic and human enamel with and without primer treatment.
  • Analyzed failure patterns using an Image Capture System after tensile bond testing.

    • Main Results:

    • Higher primer concentrations generally led to lower degree of conversion and inferior mechanical properties.
    • Adhesive/primer mixtures inhibited free radical polymerization, decreasing Knoop hardness and direct tensile strength.
    • Tensile bond strength was significantly greater without primer treatment in certain cases.
    • Failure modes included cohesive and/or interfacial fractures at the ceramic surface.

    Conclusions:

    • Primers can adversely affect the polymerization and mechanical integrity of dental bonding agents.
    • Primer application may compromise the bond strength to dental substrates like glass-ceramic and enamel.
    • Optimizing or omitting primer use could be crucial for enhancing the performance of dental adhesive systems.