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Proceedings Paper

Er:YAG laser micro-preparation of hard dental tissue
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Paper Abstract

Free running and Q-switch infrared Er:YAG laser radiations were compared in the case of hard tissue preparation. The interaction energy of 40 mJ in pulse 200 us long yielding to the interaction intensity 62 kW/cm2, and the energy of 20 mJ in 100 ns long pulse yielding to the interaction intensity 62 MW/cm2 was used for the case of free running, and Q-switch regime, respectively. For the radiation delivery, waveguide transfer system was used. It consisted of input lens (40 mm focal length), a cyclic olefin polymer coated silver hollow glass waveguide (700/850 um diameter), and output lens (55 um focal length). For the interaction experiment the samples of the extracted human teeth cut into longitudinal sections and polished were used. The thickness of the prepared samples ranged from 5 to 7 mm. The methods were compared from the point of prepared cavity shape (SEM), inner surface, and possibility of selective removal of carries. The composite filling material was used to reconstruct the cavities.

Paper Details

Date Published: 8 March 2007
PDF: 7 pages
Proc. SPIE 6425, Lasers in Dentistry XIII, 64250G (8 March 2007); doi: 10.1117/12.698148
Show Author Affiliations
Tat'jana Dostálová, Charles Univ. Prague (Czech Republic)
Helena Jelínková, Czech Technical Univ. (Czech Republic)
Michal Nemec, Czech Technical Univ. (Czech Republic)
Petr Koranda, Czech Technical Univ. (Czech Republic)
Mitsunobu Miyagi, Sendai National College of Technology (Japan)
Katsumasa Iwai, Sendai National College of Technology (Japan)
Yi-Wei Shi, Fudan Univ. (China)
Yuji Matsuura, Tohoku Univ. (Japan)


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

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