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Scientific article
English

Micromorphology of root canal walls after laser activated irrigation

Publication date2023-11-17
First online date2023-11-17
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 longitudinally. 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 laseractivated irrigation with different wavelengths impacted the smear layer and root canal dentin differently through pure physical/mechanical effects.

eng
Keywords
  • Activated Irrigation
  • Disinfection
  • Endodontics
  • Laser
  • Smear-Layer
Citation (ISO format)
ANTON Y OTERO, Clara et al. Micromorphology of root canal walls after laser activated irrigation. In: European journal of prosthodontics and restorative dentistry, 2023. doi: 10.1922/EJPRD_2600AntonyOtero11
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ISSN of the journal0965-7452
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