Selective preparation of hard dental tissue: classical and laser treatments comparison

Tat'jana Dostálov; Helena Jelínkova; Michal Nĕmec; Petr Koranda; Mitsunobu Miyagi; Katsumasa Iwai; Yi-Wei Shi; Yuji Matsuura

doi:10.1117/12.647436

15 February 2006 Selective preparation of hard dental tissue: classical and laser treatments comparison

Tat'jana Dostálov, Helena Jelínkova, Michal Nĕmec, Petr Koranda, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

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Proceedings Volume 6137, Lasers in Dentistry XII; 61370E (2006) https://doi.org/10.1117/12.647436
Event: SPIE BiOS, 2006, San Jose, California, United States

Abstract

For the purpose of micro-selective preparation which is part of the modern dentistry four various methods were examined: ablation by Er:YAG laser radiation (free-running or Q-switching regime), preparation of tissues by ultrasonic round ball tip, and by the classical dental drilling machine using diamond round bur. In the case of Er:YAG laser application the interaction energy 40 mJ in pulse of 200 us yielding to the interaction intensity 62 kW/cm², and 20 mJ in pulse of 100 ns yielding to the interaction intensity 62 MW/cm² was used for the case of free running, and Q-switch regime, respectively. For comparisson with the classical methods the ultrasound preparation tip (Sonixflex cariex TC, D-Sonicsys micro) and dental driller together with usual preparation burrs and standard handpiece were used. For the interaction experiment the samples of extracted human teeth and ebony 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. The dye penetrating analysis was performed.

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Tat'jana Dostálov, Helena Jelínkova, Michal Nĕmec, Petr Koranda, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, and Yuji Matsuura "Selective preparation of hard dental tissue: classical and laser treatments comparison", Proc. SPIE 6137, Lasers in Dentistry XII, 61370E (15 February 2006); https://doi.org/10.1117/12.647436

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KEYWORDS

Er:YAG lasers

Laser tissue interaction

Teeth

Tissues

Laser dentistry

Natural surfaces

Q switching

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