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Proceedings Paper

In-vitro investigation of bactericidal effect and dentin permeability of an Nd:YAG laser
Author(s): Brigitte Ragot-Roy; Claude Severin
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Paper Abstract

The aim of this study was to investigate the effect of a pulsed Nd-YAG laser on E. coli and S. aureus in suspensions. The temperature increased in the bacterial suspensions after each irradiation according to power and dye concentration. The bactericidal effect was evaluated by comparing the number of viable bacteria remaining after 24 h in the irradiated and the control specimens. Afterwards, an in vitro study of dentin permeability on horizontal sections of healthy dentin has been carried out following an original method derived from Pashley's experimentation. The results indicate the parameters (1,5 W; 20 Hz; with black dye) which should be used to obtain the bactericidal effect. An undesirable rise in temperature and in dentin permeability has been observed and a S.E.M. examination has been carried out in order to explain this result.

Paper Details

Date Published: 19 January 1996
PDF: 5 pages
Proc. SPIE 2623, Medical Applications of Lasers III, (19 January 1996); doi: 10.1117/12.230330
Show Author Affiliations
Brigitte Ragot-Roy, UFR Odontologie (France)
Claude Severin, UFR Odontologie (France)


Published in SPIE Proceedings Vol. 2623:
Medical Applications of Lasers III
Stephen G. Bown; Herbert J. Geschwind; Raimund Hibst; Frederic Laffitte; Giulio Maira; Roberto Pini; Hans-Dieter Reidenbach; Hans H. Scherer; Pasquale Spinelli, Editor(s)

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