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Related Experiment Videos

Flowable composites as "filled adhesives:" a microleakage study.

Luis Guilherme Sensi1, Fabiano Carlos Marson, Sylvio Monteiro

  • 1Department of Operative Dentistry, Universidade Federal de Santa Catarina, Florianópolis, Brazil. luis_sensi@hotmail.com

The Journal of Contemporary Dental Practice
|November 24, 2004
PubMed
Summary

Co-curing flowable resin composite with adhesive resulted in the worst microleakage in Class V cavities. Separate curing showed no significant difference from the control, questioning flowable composites for minimizing dentin margin microleakage.

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Area of Science:

  • Restorative Dentistry
  • Dental Materials Science

Background:

  • Microleakage at the tooth-restoration interface is a significant clinical challenge.
  • Flowable resin composites are often used to improve adaptation and reduce microleakage, particularly at dentin margins.

Purpose of the Study:

  • To evaluate and compare the microleakage of a flowable resin composite with an adhesive in Class V cavities.
  • To investigate the effect of separate light curing versus co-curing (simultaneous curing) of the adhesive and flowable composite on microleakage.

Main Methods:

  • Class V cavities were prepared in human molars with margins on enamel and dentin/cementum.
  • Three groups were tested: control (adhesive + conventional composite), separate curing (adhesive + flowable composite, light cured separately) + conventional composite, and co-cured (adhesive + flowable composite, light cured simultaneously) + conventional composite.

Related Experiment Videos

  • Microleakage was assessed using dye penetration after thermocycling.

    • Main Results:

    • A statistically significant difference in microleakage was found between the co-cured group and both the control and separate-curing groups (p=0.0044).
    • The co-cured group exhibited the highest microleakage.
    • No significant difference in microleakage was observed between the control group and the separate-curing group.

    Conclusions:

    • Simultaneous light curing (co-curing) of a flowable resin composite with an adhesive leads to the poorest marginal seal in Class V cavities.
    • The effectiveness of using flowable composites to minimize microleakage at dentin margins is questionable when co-cured with adhesive.
    • Separate curing of the adhesive and flowable composite does not appear to offer an advantage over conventional composite in preventing microleakage.