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Effect of laser treatment on the root canal of human teeth
Author(s) -
Khan M. Azam,
Khan M. Fazlur Rahman,
Khan M. Wahiduzzaman,
Wakabayashi H.,
Matsumoto K.
Publication year - 1997
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1997.tb00027.x
Subject(s) - root canal , dentistry , orthodontics , medicine , root (linguistics) , philosophy , linguistics
The purpose of this study was to examine the morphological and temperature changes of the apical portion of human extracted teeth treated by Nd: YAG, CO 2 and Argon‐lasers. Seventy‐two single‐rooted human teeth were studied. The root canals were prepared conventionally. Laser treatment of the apical portion of the canal was carried out by means of an optic fiber or metal tip. Temperatures were recorded thermographically. Two‐thirds of the specimens were stained with black India ink and 36% silver ammonium fluoride solution. All specimens were irradiated by the three types of lasers at several intensities and the temperatures were recorded. Half of the specimens were prepared for the telescopic light microscope and for scanning electron microscopic observation, and the rest for histopathological examination by light microscope. The scanning electron microscopic evaluation showed that the laser energy vaporized the deposited debris, producing a glaze‐like surface. The histopathological investigation revealed a tapered, enlarged apical lased area. All three laser devices were capable of vaporizing the debris in this way, but the degree of morphological change was highly dependent on energy level and duration. The Argon‐laser produced the highest temperatures.