Numéro
J. Phys. IV France
Volume 01, Numéro C7, Décembre 1991
2nd International Conference
Laser M2P
Page(s) C7-239 - C7-243
DOI http://dx.doi.org/10.1051/jp4:1991761
2nd International Conference
Laser M2P

J. Phys. IV France 01 (1991) C7-239-C7-243

DOI: 10.1051/jp4:1991761

EFFET DE L'IRRADIATION LASER À CO2 SUR LA DENTINE DES DENTS HUMAINES

G.G.Y. MARCON and B. VIDAL

Laboratoire de Thermodynamique et Physico-Chimie Métallurgiques, E.N.S.E.E.G., Domaine Universitaire, BP. 75, F-38402 Saint-Martin-d'Héres cedex, France


Abstract
The objective of this study was to determine the influence of single and multiple impacts of CO2 laser on dentine in recently extracted human teeth. It has been shown that laser irradiation of dentine may produce deep craters, the dimensions of which are determined by the power and duration of the laser beam. The formation of the craters is accompanied by the development of microfissures in the dentine and heat-affected zones in which compositional and phase changes are observed. Other structural changes in the dentine, such as enhancement of hardness and blocking of the tubules in the irradiated zone, have been detected.



© EDP Sciences 1991