Tooth bleaching using three laser systems, halogen-light unit and chemical action agents

Tatjana Dostalova, Helena Jelínková, Devana Housova, Jan Šulc, Michal Nemec, Petr Koranda, Mitsunobu Miyagi, Yi Wei Shi, Yuji Matsuura

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


The study describes the preclinical experience with laser-activated bleaching agent for discolored teeth. Extracted human upper central incisors were selected, and in the bleaching experiment 35% hydrogen peroxide was used. Three various laser systems and halogen-light unit for activation of the bleaching agent were applied. They were Alexandrite laser (wavelength 750 nm and 375 nm - SHG), Nd:YAG laser (wavelength 1.064 μm), and Er:YAG laser (wavelength 2.94 μm). The halogen-light unit was used in a standard regime. The enamel surface was analyzed in the scanning electron microscope. The method of chemical oxidation results in a 2-3 shade change in one treatment. The halogen-light units produced the same effect with shorter time of bleaching process (from 630 s to 300 s). The Alexandrite laser (750 nm) and bleaching agent helped to reach the desired color shade after a shorter time (400 s). Alexandrite laser (375 nm) and Nd:YAG laser had no effect on the longevity of the process of bleaching. Overheating of the chemical bleaching agent was visible after Er:YAG laser activation (195 s). Slight surface modification after bleaching process was detected in SEM.

Original languageEnglish
Article number33
Pages (from-to)213-217
Number of pages5
JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Publication statusPublished - 2004
EventLaser Florence 2003: A Window on the Laser Medicine World - Florence, Italy
Duration: 2003 Nov 62003 Nov 8


  • Dentistry
  • Hollow glass waveguide
  • Laser light speeding of bleaching
  • Tooth bleaching


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