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Proceedings Paper

Surface modification of dental tissues by KrF excimer laser radiation
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Paper Abstract

Laser treatment is a promising technique for dental applications such as caries removal, dental hypersensitivity reduction and improvement of the bond strength between dentin and restoration materials. In this study the topographic and morphological changes induced in enamel and dentin surfaces by treating with KrF excimer laser radiation were studied as a function of the number of laser pulses and radiation fluence by scanning electron microscopy and optical profilometry. For enamel, independently of the fluence used, material removal occurs preferentially at the prisms sheaths, leading to the formation of surface pits of a few micrometers. For dentin, a cone-like topography develops when the tubules are approximately parallel to the laser beam direction and the radiation fluence is within the range 0.5 to 1.5 J/cm2. For higher fluences, the treated surfaces are flat and covered with a layer of re-solidified materials.

Paper Details

Date Published: 8 March 2007
PDF: 7 pages
Proc. SPIE 6425, Lasers in Dentistry XIII, 64250H (8 March 2007); doi: 10.1117/12.697198
Show Author Affiliations
M. Sivakumar, Instituto Superior Técnico (Portugal)
V. Oliveira, Instituto Superior Técnico (Portugal)
R. Vilar, Instituto Superior Técnico (Portugal)

Published in SPIE Proceedings Vol. 6425:
Lasers in Dentistry XIII
Peter Rechmann D.D.S.; Daniel Fried, Editor(s)

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