Micromorphology of Root Canal Walls After Laser Activated Irrigation

Clara I. Anton Y Otero*, Laurine Marger, Albert Feilzer, Ivo Krejci, Marwa Abdelaziz

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

This study aims to investigate the effects of laser-activated irrigation on root canal dentin using different laser wavelengths. Sixty-six roots were prepared and split longitu-dinally. First, lasers with different power settings were tested on 34 samples, pre-etched with phosphoric acid, or remaining with a smear-layer to determine the test parameters. Selected parameters were then applied on thirty roots (9 groups) covered with smear layer: 1. Smear-layer removed; 2. Smear-layer untouched; 3. Conventional needle irrigation with NaOCl and EDTA; 4. ER:YAG laser; 5. 9.3 µm CO2 laser; 6-9. Diode lasers. All lasers were applied in ultra-pure water as an irrigant. Root halves were examined by scanning electron microscope to analyze the intracanal dentin micromorphology on 9 consequent photos per specimen @ a magnification of 1000X. The results showed that conventional needle irrigation was effective in removing the smear-layer from coronal and middle root parts, while laser-activated irrigation had two main mechanisms: cleaning and opening of the dentinal tubules by removing the smear layer (Er:YAG laser) and melting of dentin (CO2 and diode lasers) in all root parts. The study concluded that laser-activated irrigation with different wavelengths impacted the smear layer and root canal dentin differently through pure physical/mechanical effects.

Original languageEnglish
Pages (from-to)109-119
Number of pages11
JournalEuropean Journal of Prosthodontics and Restorative Dentistry
Volume32
Issue number1
Early online date24 Nov 2023
DOIs
Publication statusPublished - Mar 2024

Bibliographical note

Publisher Copyright:
© 2024 by Dennis Barber Ltd. All rights reserved.

Keywords

  • Activated Irrigation
  • Disinfection
  • Endodontics
  • Laser
  • Smear-Layer

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