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Mesoscopic Modelling of the Interaction of Infrared Lasers with Composite Materials: an Application to Human Dental Enamel by A. Vila Verde; Marta M.D. Ramos; Marshall Stoneham; R. Mendes Ribeiro is a Materials Science article available to read on EtoBox.

What is Mesoscopic Modelling of the Interaction of Infrared Lasers with Composite Materials: an Application to Human Dental Enamel about?

The mesostructure and composition of composite materials determine their mechanical, optical and thermal properties and, consequently, their response to incident radiation. We have developed general finite element models of porous composite materials under infrared radiation to examine the influence of pore size on one of the determining parameters of the stress distribution in the material: the temperature distribution. We apply them to the specific case of human dental enamel, a material which has nanometer scale pores containing water/organic, and predict the maximum temperature reached after a single 0.35 ms laser pulse of sub-ablative fluence by two lasers: Er:YAG (2.9 mm) and CO 2 (10.6 mm). For the Er:YAG laser, the results imply a strong dependence of the maximum temperature reached at the pore on the area-to-volume ratio of the pore, whereas there is little such dependence for CO 2 lasers. Thus, CO 2 lasers may produce more reproducible results than Er:YAG lasers when it comes to enamel ablation, which may be of significant interest during clinical practice. More generally, when ablating composite materials by infrared lasers researchers should account for the material's m

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Author

A. Vila Verde; Marta M.D. Ramos; Marshall Stoneham; R. Mendes Ribeiro

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0169-4332)

Published

2004

Language

EN

Field

Materials Science (Physical Sciences)