Effect of free electron laser (FEL) irradiation on tooth dentine

Seiji Ogino; Kunio Awazu; Takio Tomimasu

doi:10.1117/12.260681

3 December 1996 Effect of free electron laser (FEL) irradiation on tooth dentine

Seiji Ogino, Kunio Awazu, Takio Tomimasu

Proceedings Volume 2922, Laser Applications in Medicine and Dentistry; (1996) https://doi.org/10.1117/12.260681
Event: BiOS Europe '96, 1996, Vienna, Austria

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.

Citation Download Citation

Seiji Ogino, Kunio Awazu, and Takio Tomimasu "Effect of free electron laser (FEL) irradiation on tooth dentine", Proc. SPIE 2922, Laser Applications in Medicine and Dentistry, (3 December 1996); https://doi.org/10.1117/12.260681

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