3 July 2003 Modeling of the human enamel laser ablation process at the mesoscopic scale
Author Affiliations +
Proceedings Volume 4950, Lasers in Dentistry IX; (2003) https://doi.org/10.1117/12.472874
Event: Biomedical Optics, 2003, San Jose, CA, United States
Abstract
A mesoscopic simulation of the process of human enamel laser ablation by Er:YAG and CO2 lasers is being developed using the finite element method, taking into account the complex structure and chemical composition of this material. A geometric model that allows studying in detail the temperature, stress and displacement distribution within a few enamel rods is presented. The heat generation that takes place inside the enamel at the centre of the laser spot, caused by a non-ablative laser pulse emitted by CO2 and Er:YAG lasers, was simulated. The sensitivity of our model to the estimated material parameters was studied. Temperature, displacement and stress distribution maps obtained for both lasers are presented. These preliminary results suggest that the temperature distribution across the enamel rods is different in the two situations considered; thermally induced stresses in the material are higher in the regions that are richer in hydroxyapatite (HA), and the higher displacements are observed in the regions that are rich in water. The rod tails inside enamel present higher stresses in the direction perpendicular to the surface of enamel than the ones that are created at the surface of our simulated structure. We conclude that the mesostructure plays a crucial role in the accurate modelling of dental laser ablation.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ana C. Vila Verde, Ana C. Vila Verde, Marta Maria Duarte Ramos, Marta Maria Duarte Ramos, Ricardo Mendes Ribeiro, Ricardo Mendes Ribeiro, Marshall Stoneham, Marshall Stoneham, } "Modeling of the human enamel laser ablation process at the mesoscopic scale", Proc. SPIE 4950, Lasers in Dentistry IX, (3 July 2003); doi: 10.1117/12.472874; https://doi.org/10.1117/12.472874
PROCEEDINGS
11 PAGES


SHARE
Back to Top