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Related Experiment Videos

Laser-induced temperature changes in dentine.

O R Keller1, F E Weber, K W Grätz

  • 1Department of Cranio-Maxillofacial Surgery, University Hospital Zurich, Zurich, Switzerland. okeller@zzmk.unizh.ch

Journal of Clinical Laser Medicine & Surgery
|January 8, 2004
PubMed
Summary
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Super pulsed carbon dioxide (CO2) laser ablation of human dentine shows minimal temperature rise, less than conventional drilling. This laser technology offers a safe, tissue-preserving alternative for dental procedures.

Area of Science:

  • Biomedical Engineering
  • Dental Materials Science
  • Laser Physics

Background:

  • Limited research exists on the thermal effects of super pulsed CO2 lasers (9.6 micrometers) on human dentine.
  • Understanding thermal impact is crucial for safe and effective dental laser applications.

Purpose of the Study:

  • To investigate temperature rise and potential thermal damage during human dentine ablation using a super pulsed CO2 laser (9.6 micrometers).
  • To compare the thermal effects and ablation efficacy of the laser system with conventional dental drilling.

Main Methods:

  • Human dentine slices and crown segments were ablated using a super pulsed CO2 laser (9.6 micrometers) with water-cooling and scanner, at varying power settings (2-8 W).
  • A control group underwent conventional handpiece drilling.

Related Experiment Videos

  • Ablation depth and temperature rise were measured; Scanning Electron Microscopy (SEM) assessed morphological changes.

    • Main Results:

    • The laser system resulted in a mean temperature rise of less than 1.68°C, which is lower than conventional drilling (2.87°C) at comparable ablation rates.
    • Laser ablation of crown segments showed a consistent decrease in temperature.
    • SEM analysis revealed no significant thermal damage like melting, charring, or cracking.

    Conclusions:

    • The super pulsed 9.6 microm CO2 laser demonstrates safe and tissue-preserving characteristics for dentine ablation.
    • The laser system exhibits lower thermal impact than conventional drilling.
    • The laser's efficacy in ablation is comparable to conventional dental drills.