Analysis of surface roughness of enamel and dentin after Er,Cr:YSGG laser irradiation

J Clin Laser Med Surg. 2001 Dec;19(6):297-303. doi: 10.1089/104454701753342749.


Objective: The purpose of this investigation was to compare the surface roughness of enamel and dentin following the Er,Cr:YSGG laser irradiation and acid etching.

Background data: Laser-roughened enamel or dentin surfaces have been expected to enhance restorative materials bond strength.

Materials and methods: Er,Cr:YSGG laser irradiation was performed in one half of each polished enamel or dentin sample at 3 W (33.9 J/cm2, with air 70% and water 20%,) pulse energy for 6 sec. Then the other half was treated with 37% phosphoric acid for 30 sec. Surface roughness and morphological studies were performed.

Results: It was found that surface roughness was significantly increased with the laser system. Scanning electron microscopy analysis showed that irradiated surface produces a rough surface that was completely lacking of a smear layer; there was also no cracking of enamel or dentin.

Conclusion: Er,Cr:YSGG laser irradiation could provide an effective and alternative method to the acid etch technique.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acids / pharmacology*
  • Carbon Dioxide
  • Dental Enamel / radiation effects*
  • Dental Enamel / ultrastructure*
  • Dentin / radiation effects*
  • Dentin / ultrastructure*
  • Erbium
  • Humans
  • Low-Level Light Therapy*
  • Materials Testing
  • Microscopy, Electron
  • Molar
  • Neodymium
  • Sensitivity and Specificity


  • Acids
  • Carbon Dioxide
  • Neodymium
  • Erbium