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Proceedings Paper

Er:Yag laser: the promising procedure for caries treatment
Author(s): Isao Ishikawa; Akira Aoki; Hisashi Watanabe; Yoshinori Ando; Toshimoto Yamada; Masayuki Otsuki; Junji Tagami
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Paper Abstract

The effectiveness of the Er:YAG laser for caries removal was evaluated in vitro and in vivo. As the in vitro study, thirty-two extracted human teeth with cervical root caries were used. An axially divided half of each caries lesion was treated with the Er:YAG laser, and the other was removed with round steel burs mounted on a micromotor or was left untreated as a control. Laser irradiation was performed in contact and non-contact mode at 145 mJ/pulse (51.3 J/cm2/pulse) and 10 pps under water spray. Conventional micromotor treatment was performed at 10,000 rpm using some different size of round steel burs. Measurement of time required for caries removal, histological observation of decalcified serial sections, SEM observation and hardness measurement of the cavity floor dentin were conducted with both laser and conventional treatments. In addition to the above in vitro study, the usefulness of root caries treatment with the Er:YAG laser was assessed in vivo as a clinical trial. The results indicated that removal of carious dentin using the Er:YAG laser was completed effectively to the same extent as the conventional treatment and thermal damage of the lased cavity was minimum. The Er:YAG laser treatment diminished unpleasant sound and vibration, when compared with the conventional rotary technique. We conclude that the Er:YAG laser possesses the promising characteristics for caries removal.

Paper Details

Date Published: 23 April 1996
PDF: 4 pages
Proc. SPIE 2672, Lasers in Dentistry II, (23 April 1996); doi: 10.1117/12.238777
Show Author Affiliations
Isao Ishikawa, Tokyo Medical and Dental Univ. (Japan)
Akira Aoki, Tokyo Medical and Dental Univ. (Japan)
Hisashi Watanabe, Tokyo Medical and Dental Univ. (Japan)
Yoshinori Ando, Tokyo Medical and Dental Univ. (Japan)
Toshimoto Yamada, Tokyo Medical and Dental Univ. (Japan)
Masayuki Otsuki, Tokyo Medical and Dental Univ. (Japan)
Junji Tagami, Tokyo Medical and Dental Univ. (Japan)


Published in SPIE Proceedings Vol. 2672:
Lasers in Dentistry II
Harvey A. Wigdor; John D. B. Featherstone; Joel M. White; Joseph Neev, Editor(s)

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