Examination of dental hard tissues after short pulse Nd:YAG laser irradiation
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2002
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INTERNATIONAL CONGRESS ON LASERS IN DENTISTRY, 8th; ANNUAL MEETING OF THE JAPANESE SOCIETY FOR LASER DENTISTRY, 14th
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In the course of high intensity laser irradiation, expressive chemical and physical alteration may be induced in the irradiated
dental tissues. We used short pulse Nd:YAG laser, with which damage in the tissue is reduced and thermal load can be better
controlled. The use of nano and picosecond pulselengh also assures better accuracy in affected zone as well a smaller deepness.
In one of the experiments, specimens were irradiated with different energy densities in a unique track of the laser beam on the
enamel surface. Laser parameters used were: pulse width 6ns, energy densities from 10J/cm2 to 40J/cm2 and focused beam
diameter of 0.1cm. In this case, the area of affected zone was 3 times higher than expected. In other experiment, bursts of shorter
laser pulse width were used. In this case the laser emissin was formed by bursts composed of a train of 10 pulses with 100 ns of
pulse width each. Energy densities from 10J/cm2 to 22.5J/cm2 and a focused beam diameter of 0.06cm were used. Heat affected
zone was determined by Scanning Electron Microscopy, which showed a direct relationship between energy employed and
morphological changes and as a result of dental tissue damage dimension.
Como referenciar
ANTUNES, A.; VIANNA, S.S.; GOMES, A.S.L.; ROSSI, W. de; ZEZELL, D.M. Examination of dental hard tissues after short pulse Nd:YAG laser irradiation: morphological and chemical analysis. In: INTERNATIONAL CONGRESS ON LASERS IN DENTISTRY, 8th; ANNUAL MEETING OF THE JAPANESE SOCIETY FOR LASER DENTISTRY, 14th, July 31 - August 2, 2002, Yokohama, Japan. Abstract... Aachen, Alemanha: International Society for Laser in Dentistry, 2002. p. 77-77. Disponível em: http://repositorio.ipen.br/handle/123456789/32350. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.