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Proceedings Paper

Time-course diffusion of hydrogen peroxide using modern technologies
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Paper Abstract

The concern with the hydrogen penetration towards the pulp can be observed on the literature by the great number of papers published on this topic; Those measurements often uses chemical agents to quantify the concentration of the bleaching agent that cross the enamel and dentin. The objective of this work was the quantification of oxygen free radicals by fluorescence that are located in the interface between enamel and dentin. It was used to accomplish our objectives a Ruthenium probe (FOXY R - Ocean Optics) a 405nm LED, a bovine tooth and a portable diagnostic system (Science and support LAB - LAT - IFSC/USP). The fluorescence of the probe is suppressed in presence of oxygen free radicals in function of time. The obtained results clearly shows that the hydrogen peroxide when not catalyzed should be kept in contact with the tooth for longer periods of time.

Paper Details

Date Published: 23 February 2009
PDF: 8 pages
Proc. SPIE 7162, Lasers in Dentistry XV, 716209 (23 February 2009); doi: 10.1117/12.809285
Show Author Affiliations
F. L. E. Florez, São Paulo State Univ. (Brazil)
J. D. Vollet-Filho, Univ. of São Paulo (Brazil)
O. B. Oliveira-Junior, São Paulo State Univ. (Brazil)
V. S. Bagnato, Univ. of São Paulo (Brazil)


Published in SPIE Proceedings Vol. 7162:
Lasers in Dentistry XV
Peter Rechmann; Daniel Fried, Editor(s)

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