Femtosecond laser ablation on dental hard tissues—Analysis of ablated profile near an interface using local effective intensity
| Autor: | Gustavo Nicolodelli, Maristela Dutra-Correa, Cristina Kurachi, J. R. Rodrigues, V. S. Bagnato |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
business.industry medicine.medical_treatment Attenuation Condensed Matter Physics Ablation Laser Industrial and Manufacturing Engineering Atomic and Molecular Physics and Optics law.invention Discontinuity (linguistics) Optics stomatognathic system law Femtosecond medicine Sapphire ESMALTE DENTÁRIO Photonics business Instrumentation Intensity (heat transfer) |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1555-6611 1054-660X |
| Popis: | This study evaluated the process of ablation produced by a Ti:Sapphire femtosecond laser under different average powers taking place at the enamel/dentin interface. Based on the geometry of ablated microcavities the effective intensity for ablation was obtained. This study shows the validity for the local effective intensity analysis and allows a quantification of the variation in the ablation geometry taking place at the interface of two naturally different materials. It shows that the variation of the diameter of the ablated region as a function of the cavity depth comes essentially from a mechanism of effective intensity attenuation, as a result of a series of complex effects. Additionally, our data are sufficient to predict that a discontinuity on the ablation profile will occur on the interface between two biological media: enamel-dentin, showing a suddenly jump on the ablated cavity dimensions. |
| Databáze: | OpenAIRE |
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