Effect of Ultrasonic Activation of Irrigants on Smear Layer Removal

Tamer F. Schmidt, Cleonice S. Teixeira, Mara C.S. Felippe, Wilson T. Felippe, David Henry Pashley, Eduardo A. Bortoluzzi

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Introduction The objective of this study was to evaluate the efficacy of passive ultrasonic irrigation (PUI) with 17% EDTA and 1% NaOCl solutions on smear layer removal. Methods Root canal preparations of 32 human teeth were performed with the ProTaper system. Next, they were longitudinally fractured to permit quantitation of smear layer creation from the cervical, middle, and apical thirds of the roots by using scanning electron microscopy. After reassembling the fractured tooth halves, they were divided into 4 groups according to different final irrigation protocols: group1, EDTA + NaOCl; group 2, EDTA with PUI + NaOCl; group 3, EDTA + NaOCl with PUI; and group 4, EDTA + NaOCl, both with PUI. After irrigation, the tooth halves were separated to permit imaging the same areas by scanning electron microscopy, and a percentage of opened dentinal tubules in irrigated areas as a percent of the total area was obtained. The results were submitted to Kruskal-Wallis, analysis of variance, and Bonferroni tests (α = 0.05). Results The cervical third of the samples from all groups showed higher percentage of smear layer removal and open dentinal tubule areas, followed by the middle and apical thirds. Among the irrigation groups, there were statistically significant differences in cervical third between group 2 and group 4 samples, with the highest and lowest percentage of smear layer removal, respectively. Conclusions PUI by using 1% NaOCl and ultrasonic tip placed within 1 mm of the apical foramen did not show higher efficacy in smear layer removal compared with conventional irrigation.

Original languageEnglish (US)
Pages (from-to)1359-1363
Number of pages5
JournalJournal of Endodontics
Volume41
Issue number8
DOIs
StatePublished - Aug 1 2015

Fingerprint

Smear Layer
Ultrasonics
Edetic Acid
Tooth
Electron Scanning Microscopy
Root Canal Preparation
Tooth Apex
Analysis of Variance

Keywords

  • Irrigation
  • SEM
  • passive ultrasonic irrigation
  • smear layer

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Schmidt, T. F., Teixeira, C. S., Felippe, M. C. S., Felippe, W. T., Pashley, D. H., & Bortoluzzi, E. A. (2015). Effect of Ultrasonic Activation of Irrigants on Smear Layer Removal. Journal of Endodontics, 41(8), 1359-1363. https://doi.org/10.1016/j.joen.2015.03.023

Effect of Ultrasonic Activation of Irrigants on Smear Layer Removal. / Schmidt, Tamer F.; Teixeira, Cleonice S.; Felippe, Mara C.S.; Felippe, Wilson T.; Pashley, David Henry; Bortoluzzi, Eduardo A.

In: Journal of Endodontics, Vol. 41, No. 8, 01.08.2015, p. 1359-1363.

Research output: Contribution to journalArticle

Schmidt, TF, Teixeira, CS, Felippe, MCS, Felippe, WT, Pashley, DH & Bortoluzzi, EA 2015, 'Effect of Ultrasonic Activation of Irrigants on Smear Layer Removal', Journal of Endodontics, vol. 41, no. 8, pp. 1359-1363. https://doi.org/10.1016/j.joen.2015.03.023
Schmidt TF, Teixeira CS, Felippe MCS, Felippe WT, Pashley DH, Bortoluzzi EA. Effect of Ultrasonic Activation of Irrigants on Smear Layer Removal. Journal of Endodontics. 2015 Aug 1;41(8):1359-1363. https://doi.org/10.1016/j.joen.2015.03.023
Schmidt, Tamer F. ; Teixeira, Cleonice S. ; Felippe, Mara C.S. ; Felippe, Wilson T. ; Pashley, David Henry ; Bortoluzzi, Eduardo A. / Effect of Ultrasonic Activation of Irrigants on Smear Layer Removal. In: Journal of Endodontics. 2015 ; Vol. 41, No. 8. pp. 1359-1363.
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