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Proceedings Paper

Morphological analysis of the retrofilled apical dentin surfaces irradiated with CO2 laser
Author(s): Carlos Eduardo Aun; Jose Luiz Lage-Marques; Giulio Gavini; Naya Flaitt Clasen; Koukichi Matsumoto
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Paper Abstract

Countless researches conducted in these last years have compared the sealing capacity of various materials for retrofillings. Besides, the association of laser irradiation to traditional procedures inquires to increase the success of this kind of treatment. The purpose of this study was to evaluate the morphological changes on dentin surface and the junction between retrofilling material and apical cavity, with different materials irradiated or not with CO2 laser, in scanning electron microscopy. The following materials were used: Group A yields Super EBA; group B yields Super EBA and CO2 laser irradiation (Luxar System); group C yields Glass Ionomer Cement; group D yields Glass Ionomer Cement and CO2 laser. In groups B and D the power set was 2 watts, 20 msec, with a CT3105 ceramic point, and the power density for the CO2 laser application was 397,93 w/cm2. The morphological analysis permitted to conclude that the dentin laser irradiation showed different and less intense superficial alteration when compared with retrofilling materials. In most cases, the alterations to the material surfaces showed cavities and craters. Group B presented more irregular and affected surfaces, creating blank spaces in the adjacent areas to the radicular dentinal surfaces after laser application, probably because of the carbonization.

Paper Details

Date Published: 22 April 1998
PDF: 7 pages
Proc. SPIE 3248, Lasers in Dentistry IV, (22 April 1998); doi: 10.1117/12.306028
Show Author Affiliations
Carlos Eduardo Aun, Univ. de Sao Paulo (Brazil)
Jose Luiz Lage-Marques, Univ. de Sao Paulo (Brazil)
Giulio Gavini, Univ. de Sao Paulo (Brazil)
Naya Flaitt Clasen, Univ. de Sao Paulo (Brazil)
Koukichi Matsumoto, Showa Univ. (Japan)

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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