Translator Disclaimer
19 May 1999 Er:YAG and alexandrite laser radiation propagation in the root canal and its effect on bacteria
Author Affiliations +
Proceedings Volume 3593, Lasers in Dentistry V; (1999)
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States
The goal of the study was to verify differences between the alexandrite and Er:YAG laser energy distribution in the root canal and in the surrounding dentin and bone tissues. For the experiment, two lasers were prepared: the Er:YAG laser (λ=2.94 μm) with a delivery system fluorocarbon polymer-coated silver hollow glass waveguide ended by a special sapphire tip and the alexandrite laser (λ=0.75 μm) with a silicon fiber. The Er:YAG laser was operated in a free-running mode, the length of the generated pulses was 250 μsec and the output energy ranged from 100 to 350 mJ. The pulse length of the free- running alexandrite laser was 70 μsec and the output energy was ranged from 80 up to 200 mJ. For the experiment prepared root canals of molars were used. It was ascertained that the radiation of the alexandrite laser passes through the root canal and hits the surrounding tissue. Nocardia asteroids, Filaments, Micrococcus albus, Lactobacillus sp and Streptococcus sanguis colonies were treated by the Er:YAG or alexandrite laser radiation. The surface was checked by scanning electron microscopy. From the result it follows that the Er:YAG laser destroyed microbial colonies but the differences is in the depth of the affected area.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Helena Jelinkova, Tatjana Dostalova M.D., Jana Duskova M.D., Mitsunobu Miyagi, Shigeru Shoji, Jan Sulc, and Michal Nemec "Er:YAG and alexandrite laser radiation propagation in the root canal and its effect on bacteria", Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999);


Medical applications of 3 μm delivery waveguide system
Proceedings of SPIE (February 15 2006)
High-power laser radiation delivery
Proceedings of SPIE (November 10 2003)
Delivery system for a laser medical instrument
Proceedings of SPIE (October 14 2003)
Hollow waveguide for urology treatment
Proceedings of SPIE (February 24 2010)
Waveguide and articulated arm for Er YAG laser system ...
Proceedings of SPIE (April 22 1998)

Back to Top