An Evaluation of the Effect of Pulsed Ultrasound on the Cleaning Efficacy of Passive Ultrasonic Irrigation

Lei-Meng Jiang, B. Verhaagen, Michel Versluis, Chiara Zangrillo, Doris Cuckovic, Lucas W.M. van der Sluis

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)

Abstract

Introduction Multiple activations of the irrigant by using pulsed ultrasound may enhance the removal of dentin debris because of repeated acceleration of the irrigant. The aim of this study was to evaluate the effect of pulsed ultrasound on passive ultrasonic irrigation (PUI) in its ability to remove artificially placed dentin debris from a simulated apical oval extension within standardized root canals. Methods Each of 20 in vitro root canal models with a standard groove in the apical portion of one canal wall filled with dentin debris received PUI repeatedly, either without pulsation (group1) or with pulsation (730 milliseconds on/100 milliseconds off in group 2, 400 milliseconds on/400 milliseconds off in group 3, and 100 milliseconds on/670 milliseconds off in group 4), corresponding to duty cycles of 100%, 88%, 50%, and 13%, respectively. After each irrigation procedure, the amount of dentin debris in the groove was evaluated by taking photographs of the groove and scoring. The irrigation procedures were also visualized in vitro using high-speed imaging performed in glass root canal models. Results The debris score was significantly lower only in group 3 (p = 0.023). The in vitro visualization showed increased streaming and cavitation during the start-up phase of each pulse. Conclusions PUI with a pulsation pattern of 400 milliseconds on/400 milliseconds off and a duty cycle of 50% is more effective in removing dentin debris from a simulated apical oval extension in standardized root canals than continuous ultrasonic activation. Duty cycles of 13% and 88% showed no difference compared with continuous oscillation.
Original languageUndefined
Pages (from-to)1887-1891
Number of pages5
JournalJournal of endodontics
Volume36
Issue number11
DOIs
Publication statusPublished - 2010

Keywords

  • METIS-268453
  • pulsation
  • pulsed ultrasound
  • Dentin debris
  • IR-73949
  • passive ultrasonic irrigation

Cite this

Jiang, Lei-Meng ; Verhaagen, B. ; Versluis, Michel ; Zangrillo, Chiara ; Cuckovic, Doris ; van der Sluis, Lucas W.M. / An Evaluation of the Effect of Pulsed Ultrasound on the Cleaning Efficacy of Passive Ultrasonic Irrigation. In: Journal of endodontics. 2010 ; Vol. 36, No. 11. pp. 1887-1891.
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title = "An Evaluation of the Effect of Pulsed Ultrasound on the Cleaning Efficacy of Passive Ultrasonic Irrigation",
abstract = "Introduction Multiple activations of the irrigant by using pulsed ultrasound may enhance the removal of dentin debris because of repeated acceleration of the irrigant. The aim of this study was to evaluate the effect of pulsed ultrasound on passive ultrasonic irrigation (PUI) in its ability to remove artificially placed dentin debris from a simulated apical oval extension within standardized root canals. Methods Each of 20 in vitro root canal models with a standard groove in the apical portion of one canal wall filled with dentin debris received PUI repeatedly, either without pulsation (group1) or with pulsation (730 milliseconds on/100 milliseconds off in group 2, 400 milliseconds on/400 milliseconds off in group 3, and 100 milliseconds on/670 milliseconds off in group 4), corresponding to duty cycles of 100{\%}, 88{\%}, 50{\%}, and 13{\%}, respectively. After each irrigation procedure, the amount of dentin debris in the groove was evaluated by taking photographs of the groove and scoring. The irrigation procedures were also visualized in vitro using high-speed imaging performed in glass root canal models. Results The debris score was significantly lower only in group 3 (p = 0.023). The in vitro visualization showed increased streaming and cavitation during the start-up phase of each pulse. Conclusions PUI with a pulsation pattern of 400 milliseconds on/400 milliseconds off and a duty cycle of 50{\%} is more effective in removing dentin debris from a simulated apical oval extension in standardized root canals than continuous ultrasonic activation. Duty cycles of 13{\%} and 88{\%} showed no difference compared with continuous oscillation.",
keywords = "METIS-268453, pulsation, pulsed ultrasound, Dentin debris, IR-73949, passive ultrasonic irrigation",
author = "Lei-Meng Jiang and B. Verhaagen and Michel Versluis and Chiara Zangrillo and Doris Cuckovic and {van der Sluis}, {Lucas W.M.}",
year = "2010",
doi = "10.1016/j.joen.2010.08.003",
language = "Undefined",
volume = "36",
pages = "1887--1891",
journal = "Journal of endodontics",
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An Evaluation of the Effect of Pulsed Ultrasound on the Cleaning Efficacy of Passive Ultrasonic Irrigation. / Jiang, Lei-Meng; Verhaagen, B.; Versluis, Michel; Zangrillo, Chiara; Cuckovic, Doris; van der Sluis, Lucas W.M.

In: Journal of endodontics, Vol. 36, No. 11, 2010, p. 1887-1891.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - An Evaluation of the Effect of Pulsed Ultrasound on the Cleaning Efficacy of Passive Ultrasonic Irrigation

AU - Jiang, Lei-Meng

AU - Verhaagen, B.

AU - Versluis, Michel

AU - Zangrillo, Chiara

AU - Cuckovic, Doris

AU - van der Sluis, Lucas W.M.

PY - 2010

Y1 - 2010

N2 - Introduction Multiple activations of the irrigant by using pulsed ultrasound may enhance the removal of dentin debris because of repeated acceleration of the irrigant. The aim of this study was to evaluate the effect of pulsed ultrasound on passive ultrasonic irrigation (PUI) in its ability to remove artificially placed dentin debris from a simulated apical oval extension within standardized root canals. Methods Each of 20 in vitro root canal models with a standard groove in the apical portion of one canal wall filled with dentin debris received PUI repeatedly, either without pulsation (group1) or with pulsation (730 milliseconds on/100 milliseconds off in group 2, 400 milliseconds on/400 milliseconds off in group 3, and 100 milliseconds on/670 milliseconds off in group 4), corresponding to duty cycles of 100%, 88%, 50%, and 13%, respectively. After each irrigation procedure, the amount of dentin debris in the groove was evaluated by taking photographs of the groove and scoring. The irrigation procedures were also visualized in vitro using high-speed imaging performed in glass root canal models. Results The debris score was significantly lower only in group 3 (p = 0.023). The in vitro visualization showed increased streaming and cavitation during the start-up phase of each pulse. Conclusions PUI with a pulsation pattern of 400 milliseconds on/400 milliseconds off and a duty cycle of 50% is more effective in removing dentin debris from a simulated apical oval extension in standardized root canals than continuous ultrasonic activation. Duty cycles of 13% and 88% showed no difference compared with continuous oscillation.

AB - Introduction Multiple activations of the irrigant by using pulsed ultrasound may enhance the removal of dentin debris because of repeated acceleration of the irrigant. The aim of this study was to evaluate the effect of pulsed ultrasound on passive ultrasonic irrigation (PUI) in its ability to remove artificially placed dentin debris from a simulated apical oval extension within standardized root canals. Methods Each of 20 in vitro root canal models with a standard groove in the apical portion of one canal wall filled with dentin debris received PUI repeatedly, either without pulsation (group1) or with pulsation (730 milliseconds on/100 milliseconds off in group 2, 400 milliseconds on/400 milliseconds off in group 3, and 100 milliseconds on/670 milliseconds off in group 4), corresponding to duty cycles of 100%, 88%, 50%, and 13%, respectively. After each irrigation procedure, the amount of dentin debris in the groove was evaluated by taking photographs of the groove and scoring. The irrigation procedures were also visualized in vitro using high-speed imaging performed in glass root canal models. Results The debris score was significantly lower only in group 3 (p = 0.023). The in vitro visualization showed increased streaming and cavitation during the start-up phase of each pulse. Conclusions PUI with a pulsation pattern of 400 milliseconds on/400 milliseconds off and a duty cycle of 50% is more effective in removing dentin debris from a simulated apical oval extension in standardized root canals than continuous ultrasonic activation. Duty cycles of 13% and 88% showed no difference compared with continuous oscillation.

KW - METIS-268453

KW - pulsation

KW - pulsed ultrasound

KW - Dentin debris

KW - IR-73949

KW - passive ultrasonic irrigation

U2 - 10.1016/j.joen.2010.08.003

DO - 10.1016/j.joen.2010.08.003

M3 - Article

VL - 36

SP - 1887

EP - 1891

JO - Journal of endodontics

JF - Journal of endodontics

SN - 0099-2399

IS - 11

ER -