An SEM study of the effects of different irrigation sequences and ultrasonics

The root canals of 30 extracted human teeth with single canals were prepared biomechanically with hand instruments using a flaring technique. Three different irrigation regimes were used, with and without ultrasonic activation of a root canal file. The six irrigation sequences used in this study wer...

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Bibliographic Details
Published in:International endodontic journal Vol. 24; no. 6; p. 308
Main Authors: Abbott, P V, Heijkoop, P S, Cardaci, S C, Hume, W R, Heithersay, G S
Format: Journal Article
Language:English
Published: England 01.11.1991
Subjects:
Cetrimonium Compounds
Chi-Square Distribution
Chlorhexidine
Dental Pulp Cavity - ultrastructure
Dentin - ultrastructure
Drug Combinations
Edetic Acid
Humans
Microscopy, Electron, Scanning
Root Canal Irrigants - administration & dosage
Smear Layer
Sodium Hypochlorite
Ultrasonic Therapy
ISSN:0143-2885
Online Access:Get more information
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Summary:The root canals of 30 extracted human teeth with single canals were prepared biomechanically with hand instruments using a flaring technique. Three different irrigation regimes were used, with and without ultrasonic activation of a root canal file. The six irrigation sequences used in this study were as follows: Savlon, Savlon with ultrasound, EDTAC/NaOCl/EDTAC, EDTAC/NaOCl/EDTAC with ultrasound, NaOCl/EDTAC/NaOCl, and NaOCl/EDTAC/NaOCl with ultrasound. Scanning electron microscopic (SEM) examination of the prepared root canal walls showed a complete smear layer when Savlon was used. Ultrasound reduced the amount of smear with Savlon, but did not do so significantly with the other irrigation regimes. The most effective irrigation regime for removing smear layer and other debris was EDTAC/NaOCl/EDTAC. In all groups there was a significant decrease in cleaning efficiency as the apical end of the canal was approached.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0143-2885
DOI:10.1111/j.1365-2591.1991.tb00141.x