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Related Experiment Videos

Surface and pulp chamber temperature rises during tooth bleaching using a diode laser: a study in vitro.

M Sulieman1, J S Rees, M Addy

  • 1Division of Restorative Dentistry, Department of Oral & Dental Science, University of Bristol Dental School, Lower Maudlin Street, Bristol, BS1 2LY. m.sulieman@bristol.ac.uk

British Dental Journal
|June 13, 2006
PubMed
Summary

Diode laser tooth whitening can increase tooth temperature. Lower power settings (1-2W) kept pulp temperature below the irreversible damage threshold, but 3W exceeded it, requiring caution.

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Area of Science:

  • Dentistry
  • Biomedical Engineering

Background:

  • Tooth whitening procedures are increasingly popular.
  • Diode lasers are utilized for in-office tooth bleaching.
  • Understanding thermal effects on dental tissues is crucial for safety.

Purpose of the Study:

  • To quantify surface and pulp chamber temperature changes in anterior teeth during diode laser whitening.
  • To evaluate the impact of different diode laser power settings on tooth temperature.
  • To assess the influence of bleaching gel on temperature fluctuations.

Main Methods:

  • Extracted human anterior teeth were used for in vitro analysis.
  • A thermocouple measured temperature increases on the tooth surface and within the pulp chamber.
  • A diode laser was applied at 1W, 2W, and 3W power settings, with and without bleaching gel.

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Main Results:

  • Surface temperature increased from 37°C (1W) to 86.3°C (3W) without gel.
  • Pulp chamber temperature increased from 4.3°C (1W) to 16°C (3W).
  • Bleaching gel presence attenuated both surface and pulp chamber temperature increases.

Conclusions:

  • Diode laser settings of 1-2W resulted in pulp temperature increases below the 5.5°C threshold for irreversible pulpal damage.
  • A 3W power setting significantly exceeded this threshold, reaching 16°C.
  • Caution is advised when using higher power settings (3W) with diode laser tooth whitening to prevent pulpal injury.