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Updated: Jun 18, 2026

Adjunctive Diode Laser Therapy and Probiotic Lactobacillus Therapy in the Treatment of Periodontitis and Peri-Implant Disease
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Laser-activated irrigation within root canals: cleaning efficacy and flow visualization.

S D de Groot1, B Verhaagen, M Versluis

  • 1Department of Cariology, Endodontology & Pedodontology, Academic Center for Dentistry, Amsterdam.

International Endodontic Journal
|November 17, 2009
PubMed
Summary
This summary is machine-generated.

Laser-activated irrigation (LAI) effectively removes root canal debris. This study visualized LAI

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Area of Science:

  • Endodontics
  • Biomedical Engineering
  • Fluid Dynamics

Background:

  • Root canal cleaning is crucial for endodontic treatment success.
  • Dentine debris removal from the apical region remains a challenge.
  • Novel irrigation techniques are needed to improve cleaning efficiency.

Purpose of the Study:

  • To evaluate the efficacy of laser-activated irrigation (LAI) in removing dentine debris from the apical root canal.
  • To visualize the fluid dynamics of LAI in vitro using high-speed imaging.

Main Methods:

  • Ex vivo assessment of dentine debris removal using syringe irrigation, ultrasonic irrigation, and LAI with 2% sodium hypochlorite.
  • In vitro visualization of irrigant fluid dynamics using a glass model and high-speed camera.

Main Results:

  • LAI demonstrated significantly higher efficacy in removing apical dentine debris compared to passive ultrasonic irrigation and hand irrigation after 20 seconds of activation.
  • High-speed imaging revealed that bubble collapse-induced streaming is the primary mechanism for LAI's cleaning action.

Conclusions:

  • LAI is a highly effective method for removing dentine debris in the apical root canal.
  • The visualization of fluid dynamics provides insight into the mechanism of action for LAI.