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Proceedings Paper

Comparative study of CO2 and Nd:YAG laser on dentin layer of human root canals of permanent teeth utilizing scanning electron microscopy
Author(s): Aldo Brugnera Jr.; Marcia C. S. Lopes; Koukichi Matsumoto; Ii-Sei Watanabe
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Paper Abstract

The present paper investigated the effects of two different laser beams on dentin and root canal walls. Five human intact teeth (incisors and canines), with endodontic treatment accomplished by Paiva and Antoniazzi technique, had their crowns separated from the roots using a diamond teeth. After polishing the dentin surfaces, they were irradiated with CO2 and NdYag laser and analyzed using SEM and light microscopy. The light microscopy revealed some cicunscribed carbonized areas with some cracks of varied depths in all samples but indicated that the CO2 laser, at power level of 5 watts, was more effective than NdYag laser at power level of 2 watts. The SEM showed formation of circular depressions with areas containing dentin fusion, melted dentin on small holes on the vitrified surfaces. From the data obtained, it was concluded that the methods analyzed are able to remove the remaining residues on the dentin layer and root canal walls. However, no complete fusion of the dentin layer occurred.

Paper Details

Date Published: 22 April 1998
PDF: 5 pages
Proc. SPIE 3248, Lasers in Dentistry IV, (22 April 1998); doi: 10.1117/12.306030
Show Author Affiliations
Aldo Brugnera Jr., Camilo Castelo Branco Univ. (Brazil)
Marcia C. S. Lopes, Camilo Castelo Branco Univ. (Brazil)
Koukichi Matsumoto, Showa Univ. (Japan)
Ii-Sei Watanabe, Univ. de Sao Paulo (Brazil)

Published in SPIE Proceedings Vol. 3248:
Lasers in Dentistry IV
John D. B. Featherstone; Peter Rechmann D.D.S.; Daniel Fried, Editor(s)

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