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Related Experiment Videos

Enamel surface roughness analysis after laser ablation and acid-etching

C J Arcoria1, M G Lippas, B A Vitasek

  • 1Department of Operative Dentistry, Baylor College of Dentistry, Dallas, Texas 75246.

Journal of Oral Rehabilitation
|March 1, 1993
PubMed
Summary
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Laser roughening of tooth enamel improves acid resistance and bond strength. Different lasers create unique surface textures, with CO2/Nd:YAG beams approaching acid-etching results for enhanced dental applications.

Area of Science:

  • Dental materials science
  • Biomaterials engineering
  • Laser-tissue interaction

Background:

  • Laser-roughened enamel surfaces offer potential for improved acid resistance.
  • Enhanced restorative material/enamel bond strength is a key goal in restorative dentistry.

Purpose of the Study:

  • To investigate the effects of various laser types on enamel surface morphology.
  • To compare laser-induced enamel roughness with traditional acid-etching techniques.
  • To assess the potential of laser treatment for improving enamel properties for dental restorations.

Main Methods:

  • Extracted human tooth enamel was treated with multiple laser systems: CO2/Nd:YAG (CW), CO2 (RSP), Nd:YAG (CW), Nd:YAG (Q-switched), Argon (CW), and Ar:F excimer.
  • Standardized energy density of 25.47 J/cm² was applied across all laser treatments.

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  • Acid-etching was used as a control method for comparison.
  • Surface roughness was quantified using profilometry.

    • Main Results:

    • Acid-etched enamel exhibited significantly greater surface roughness and a distinct morphology compared to laser-treated samples.
    • Individual CO2 and Nd:YAG laser treatments produced moderate enamel surface roughness.
    • Coaxial CO2/Nd:YAG laser treatment resulted in surface roughness comparable to acid-etched enamel.
    • Different laser mediums generated characteristic enamel surface morphologies.

    Conclusions:

    • Laser irradiation can modify enamel surface topography, influencing its properties.
    • The CO2/Nd:YAG coaxial beam shows promise for creating enamel surface roughness similar to acid-etching.
    • Tailoring laser parameters allows for controlled modification of enamel surface morphology for potential dental applications.