Effect of F‐File on removal of the smear layer: A scanning electron microscope study

Abstract

The aim of this study was to evaluate the effectiveness of F-File with NaOCl on removal of the smear layer. A total of 48 single-rooted teeth were instrumented using crown-down technique with one of the irrigation agents: distilled water, 5.25% NaOCl, RC-Prep, Glyde, MTAD or F-File with NaOCl. The remaining smear layer was scored at cervical, middle and apical thirds of the roots with SEM. In all the canals of experimental groups the coronal sections were cleaner than the middle and apical sections except with distilled water (P<0.001). In the coronal third, intensive smear layer was observed in distilled water, NaOCl and F-File groups and less smear layer in MTAD (P<0.05) and least in RC-Prep and Glyde groups. In the middle third, RC-Prep and Glyde groups had less smear layer than the other groups (P<0.001). In the apical third, there was intensive smear layer in all specimens and statistical analyses showed no significant difference among the groups (P>0.05). The F-file failed to improve the effect of NaOCl in removing smear layer.

Effect of QMix 2in1 on Sealer Penetration into the Dentinal Tubules

“…This finding was in accordance with previous studies (15,38). This may be because of the fact that the dentinal tubules are fewer in number and smaller in diameter in the apical region, which would hinder the penetration of root canal irrigants (39). Moreover, dentin in the apical region of the root canal is more frequently sclerosed (40).…”

Effect of Ethylenediaminetetraacetic Acid on Root Fracture with Respect to Concentration at Different Time Exposures

“…It is generally recommended that the complete removal of smear layer is an essential requirement in root canal therapy (8). Effective methods for removing smear layer have been widely investigated (9)(10)(11), and numerous irrigants have been recommended for that purpose (12). Sodium hypochlorite (NaOCl) in a 1%-5.25% concentration is the most widely recommended irrigation solution because of its dissolving capacity of vital and necrotic tissues as well as its antimicrobial power (13).…”

Smear layer removal with F‐file

“…Sir, I read with great interest the article by Tunga et al . (1). It was an interesting study that evaluated the efficiency of F‐file in removal of the smear layer.…”