Ultrasonics in root canal therapy : a scanning electron microscopic and light microscopic study
Date
1985
DOI
Authors
Handelsman, Ira S.
Version
OA Version
Citation
Abstract
A study was undertaken to determine if there was any benefit in ultrasonically activating the irrigating solution during root canal therapy. This study compared (1) the standard hand cleaning and shaping technique developed at Boston University to the same technique with the addition of ultrasonically activating the irrigating solution; and (2) the standard B.U. technique to a commercially available ultrasonic method -- the Caviendo. The ultrasonic activation of the irrigating solution was accomplished by means of a blank probe the size of a #10 file attached to a specially designed tip for the cavitron and inserted loosely into the canal during each and every irrigation. Comparisons were made at both the light microscopic and scanning electron microscopic level. The results of this study are:
1. Ultrasonics did not produce cleaner canals at the light microscopic level. With respect to the removal of organic debris, ultrasonics was time-conuuming, superfluous, and irrelevant.
2. The Caviendo demonstrated mixed results at the light microscopic level in its ability to consistently remove organic debris from the root canal system.
3. Scanning electron microscopic examination of all teeth subjected to ultrasonics either with a blank probe or with the Caviendo showed signs of severe destruction of the root canal wall. This destruction included chipping away of dentin, flaking off of the orifice of the dentinal tubules, and microfractures in the dentin.
4. This destruction of the dentin did not seem to be just a surface phenomenon, but possibly occurred down the length of the dentinal tubules.
5. Stable and transient cavitation causes this destruction of the dentin.
Description
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Contains microphotographs.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1985 (Endodontics)
Bibliography: leaves 92-99.
Contains microphotographs.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1985 (Endodontics)
Bibliography: leaves 92-99.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.