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Proceedings Paper

Morphological analysis of cavities prepared by different parameters of Er:YAG laser
Author(s): Patricia M. Freitas; Ricardo S. Navarro; Juliana Almeida; Jose Carlos P. Imparato; Carlos P. Eduardo
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Paper Abstract

The purpose of this study was to evaluate the morphological changes in cavities made by Er:YAG laser (2.94μm)(KaVo KEY 3)(LELO-FOUSP) and high-speed drill. Cavities were made on the buccal and lingual surfaces of 27 human molars (Banco de Dentes-FOUSP), using different laser parameters (n=3): G1-15Hz/160mJ enamel/ 6Hz/200mJ dentin; G2-15Hz/180mJ enamel/ 6Hz/200mJ dentin; G3-15Hz/160mJ enamel/ 6Hz/250mJ dentin; G4-15Hz/180mJ enamel/ 6Hz/250mJ dentin; G5-15Hz/180mJ enamel/ 10Hz/180mJ dentin; G6-15Hz/160mJ enamel/ 10Hz/180mJ dentin; G7-15Hz/160mJ enamel/ 10Hz/160mJ dentin; G8-15Hz/180mJ enamel/ 10Hz/160mJ dentin and G9-high-speed drill. Samples were fixed (2.5% glutaraldhyde, 12h, 4°C), dehydrated (25-100% ethanol), dried to a critical point and sputter-coated with gold for analysis under SEM. All laser parameters used showed no evidence of thermal damage and signs of burning and melting, Er:YAG laser ablated dental hard tissues, showing enamel prisms, like scales, dentin surface without smear layer and opened dentinal tubules. It was concluded that Er:YAG laser parameters were effective for ablation of hard tissues, promoting morphological changes in irradiated tissues, creating an irregular and microretentive morphological pattern.

Paper Details

Date Published: 23 March 2005
PDF: 11 pages
Proc. SPIE 5687, Lasers in Dentistry XI, (23 March 2005); doi: 10.1117/12.602002
Show Author Affiliations
Patricia M. Freitas, School of Dentistry, Univ. of Sao Paulo (Brazil)
Ricardo S. Navarro, School of Dentistry, Univ. of Sao Paulo (Brazil)
Juliana Almeida, School of Dentistry, Univ. of Sao Paulo (Brazil)
Jose Carlos P. Imparato, School of Dentistry, Univ. of Sao Paulo (Brazil)
Carlos P. Eduardo, School of Dentistry, Univ. of Sao Paulo (Brazil)


Published in SPIE Proceedings Vol. 5687:
Lasers in Dentistry XI
Peter Rechmann; Daniel Fried, Editor(s)

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