Morphological analysis of cavities prepared by different parameters of Er:YAG laser

Patricia M. Freitas D.D.S.; Ricardo S. Navarro D.D.S.; Juliana Almeida D.D.S.; Jose Carlos P. Imparato D.D.S.; Carlos P. Eduardo D.D.S.

doi:10.1117/12.602002

23 March 2005 Morphological analysis of cavities prepared by different parameters of Er:YAG laser

Patricia M. Freitas D.D.S., Ricardo S. Navarro D.D.S., Juliana Almeida D.D.S., Jose Carlos P. Imparato D.D.S., Carlos P. Eduardo D.D.S.

Author Affiliations +

Proceedings Volume 5687, Lasers in Dentistry XI; (2005) https://doi.org/10.1117/12.602002
Event: SPIE BiOS, 2005, San Jose, CA, United States

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.

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Patricia M. Freitas D.D.S., Ricardo S. Navarro D.D.S., Juliana Almeida D.D.S., Jose Carlos P. Imparato D.D.S., and Carlos P. Eduardo D.D.S. "Morphological analysis of cavities prepared by different parameters of Er:YAG laser", Proc. SPIE 5687, Lasers in Dentistry XI, (23 March 2005); https://doi.org/10.1117/12.602002

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