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Related Experiment Video

Updated: Jun 26, 2026

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
05:30

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials

Published on: January 10, 2025

Thermal variations in the pulp chamber associated with composite insertion techniques and light-curing methods.

Ricardo Danil Guiraldo1, Simonides Consani, Mario Alexandre Coelho Sinhoreti

  • 1Department of Restorative Dentistry, Piracicaba School of Dentistry, State University of Campinas (UNICAMP), Piracicaba, SP, Brazil. rickdanil@fop.unicamp.br

The Journal of Contemporary Dental Practice
|January 15, 2009
PubMed
Summary

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Continuous light photoactivation significantly increases resin composite polymerization temperature, especially with horizontal/vertical increments. Dentists must consider this heat to protect pulp tissue during dental restorations.

Area of Science:

  • Dental Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Dental composite resins are widely used for restorations.
  • Polymerization of composite resins generates heat, potentially affecting pulp tissue.
  • Understanding thermal variations during photoactivation is crucial for clinical safety.

Purpose of the Study:

  • To evaluate the impact of different photoactivation techniques and composite insertion methods on polymerization temperature.
  • To investigate the influence of restorative phases on thermal changes during resin composite curing.

Main Methods:

  • Ninety bovine incisor teeth were used, divided into nine groups based on photoactivation (continuous, soft-start, intermittent) and increment placement (bulk, oblique, horizontal/vertical).

Related Experiment Videos

Last Updated: Jun 26, 2026

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
05:30

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials

Published on: January 10, 2025

  • Temperature was monitored in the pulp chamber using a thermocouple during photoactivation of Filtek Z250 composite resin.
  • Data were analyzed using ANOVA and Tukey's test.

    • Main Results:

    • Continuous light photoactivation, particularly with horizontal/vertical increment placement, resulted in higher temperature increases.
    • Photoactivating the adhesive with continuous light also contributed to elevated temperatures.
    • Specific combinations of techniques led to significant thermal variations.

    Conclusions:

    • The light source's photoactivation mode is the primary determinant of temperature rise during resin composite polymerization.
    • Clinicians should be mindful of potential pulp damage from heat generated during light curing, especially for extensive restorations requiring multiple exposures.