Cleanliness of dentinal tubules following gutta-percha removal with and without solvents: a scanning electron microscopic study

Aim  To determine the influence of solvents on gutta‐percha and sealer remaining on root canal walls and in dentinal tubules. Methodology  The root canals of 70 teeth were prepared chemomechanically to apical size 40. In group 1 (n = 10; control group), the canals remained unfilled. In groups 2–4 (n...

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Published in:International endodontic journal 2009-11, Vol.42 (11), p.1032-1038
Main Authors: Horvath, S. D., Altenburger, M. J., Naumann, M., Wolkewitz, M., Schirrmeister, J. F.
Format: Article
Language:English
Subjects:
Chloroform
Cuspid
Cyclohexanols
Dental Debonding - methods
Dental Pulp Cavity - ultrastructure
Dentin - ultrastructure
dentinal tubules
Dentistry
endodontic retreatment
eucalyptol
Gutta-Percha
gutta-percha removal
Humans
Incisor
Microscopy, Electron, Scanning
Monoterpenes
Retreatment
Root Canal Filling Materials
Root Canal Preparation - methods
scanning electron microscopy
Solvents
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Summary:Aim  To determine the influence of solvents on gutta‐percha and sealer remaining on root canal walls and in dentinal tubules. Methodology  The root canals of 70 teeth were prepared chemomechanically to apical size 40. In group 1 (n = 10; control group), the canals remained unfilled. In groups 2–4 (n = 20 each), the canals were filled using lateral compaction with gutta‐percha and sealer. Removal of root fillings was undertaken after 2 weeks using Gates Glidden burs and hand files without solvent (group 2), with eucalyptol (60 μL; group 3) and with chloroform (60 μL; group 4) to size 50. After further irrigation using sodium hypochlorite and ethylenediaminetetraacetic acid, the roots were split, photographed and scanning electron microscopy (SEM) was performed. The number of filled dentinal tubules (SEM) and the surface covered by root filling remnants (photographs) were evaluated for the coronal, middle and apical third of each root half. Statistical analysis was performed via mixed model for clustered data followed by Tukey’s test. Results  After pooling the results of all thirds of the canal, open tubules were more prevalent in the control group, followed by the nonsolvent group, the eucalyptol group and the chloroform group (P 
ISSN:0143-2885
1365-2591
DOI:10.1111/j.1365-2591.2009.01616.x