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Proceedings Paper

Effect of free electron laser (FEL) irradiation on tooth dentine
Author(s): Seiji Ogino; Kunio Awazu; Takio Tomimasu
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Paper Abstract

Free electron laser (FEL) gives high efficiency for the photo-induced effects when the laser is tuned to the absorption maximum of target materials. The effect on dentine was investigated using the FEL tuned to 9.4 micrometers , which is an absorption maximum of phosphoric acid in infrared region. As a result, irradiated dentine surface which was amorphous had changed to the recrystalized structure by the spectroscopic analysis of IR absorption and x-ray diffraction. Furthermore, the atomic ratio of P/Ca had reduced from 0.65 to 0.60. These results indicated that 9.4micrometers -FEL irradiation caused the selective ablation of phosphoric acid ion and the reconstruction of disordered atoms.

Paper Details

Date Published: 3 December 1996
PDF: 9 pages
Proc. SPIE 2922, Laser Applications in Medicine and Dentistry, (3 December 1996); doi: 10.1117/12.260681
Show Author Affiliations
Seiji Ogino, Free Electron Laser Research Institute (Japan)
Kunio Awazu, Free Electron Laser Research Institute (Japan)
Takio Tomimasu, Free Electron Laser Research Institute (Japan)

Published in SPIE Proceedings Vol. 2922:
Laser Applications in Medicine and Dentistry
Gregory B. Altshuler; Fausto Chiesa; Herbert J. Geschwind M.D.; Raimund Hibst; Neville Krasner M.D.; Frederic Laffitte; Giulio Maira; Reinhard Neumann; Roberto Pini; Hans-Dieter Reidenbach; Andre Roggan; Montserrat Serra I Mila, Editor(s)

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