TY - JOUR
T1 - Micromorphology of Root Canal Walls After Laser Activated Irrigation
AU - Anton Y Otero, Clara I.
AU - Marger, Laurine
AU - Feilzer, Albert
AU - Krejci, Ivo
AU - Abdelaziz, Marwa
N1 - Publisher Copyright:
© 2024 by Dennis Barber Ltd. All rights reserved.
PY - 2024/3
Y1 - 2024/3
N2 - 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.
AB - 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.
KW - Activated Irrigation
KW - Disinfection
KW - Endodontics
KW - Laser
KW - Smear-Layer
UR - http://www.scopus.com/inward/record.url?scp=85186592954&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85186592954&partnerID=8YFLogxK
UR - https://www.ejprd.org/
U2 - 10.1922/EJPRD_2600AntonyOtero11
DO - 10.1922/EJPRD_2600AntonyOtero11
M3 - Article
C2 - 37988616
AN - SCOPUS:85186592954
SN - 0965-7452
VL - 32
SP - 109
EP - 119
JO - European Journal of Prosthodontics and Restorative Dentistry
JF - European Journal of Prosthodontics and Restorative Dentistry
IS - 1
ER -