The efficacy of the self-adjusting file and ProTaper for removal of calcium hydroxide from root canals
Journal of Applied Oral Science
Print version ISSN 1678-7757
J. Appl. Oral Sci. vol.21 no.4 Bauru July/Aug. 2013
OBJECTIVE:
The goal of this study was to evaluate the efficacy of the Self-Adjusting File
(SAF) and ProTaper for removing calcium hydroxide [Ca(OH)2] from root
canals.
MATERIAL AND METHODS:
Thirty-six human mandibular incisors were instrumented with the ProTaper system up
to instrument F2 and filled with a Ca(OH)2-based dressing. After 7
days, specimens were distributed in two groups (n=15) according to the method of
Ca(OH)2 removal. Group I (SAF) was irrigated with 5 mL of NaOCl and
SAF was used for 30 seconds under constant irrigation with 5 mL of NaOCl using the
Vatea irrigation device, followed by irrigation with 3 mL of EDTA and 5 mL of
NaOCl. Group II (ProTaper) was irrigated with 5 mL of NaOCl, the F2 instrument was
used for 30 seconds, followed by irrigation with 5 mL of NaOCl, 3 mL of EDTA, and
5 mL of NaOCl. In 3 teeth Ca(OH)2 was not removed (positive control)
and in 3 teeth canals were not filled with Ca(OH)2 (negative control).
Teeth were sectioned and prepared for the scanning electron microscopy. The
amounts of residual Ca(OH)2 were evaluated in the middle and apical
thirds using a 5-score system.
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