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Updated: Aug 15, 2026
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In Vitro Evaluation of The Effects Of Er,Cr:YSGG and Diode Lasers Used on Titanium Cylinder
Published on: June 6, 2025
Comparative study of root canals instrumented manually and mechanically, with and without Er:YAG laser
Benjamín Martín Biedma1, Purificación Varela Patiño, Saem Ahn Park
1Division of Dental Pathology and Therapeutics, Department of Stomatology, Dental and Medicine School, University of Santiago de Compostela, Santiago de Compostela, Spain. bjmbptd@usc.es
Photomedicine and Laser Surgery
|November 3, 2005
Summary
The Er:YAG laser effectively removes the smear layer from root canal walls, improving cleanliness when used with manual or mechanical instrumentation for better endodontic treatment outcomes.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomedical Engineering
Background:
- Root canal treatment aims to eliminate bacteria and debris.
- Smear layer removal is crucial for effective disinfection and sealing.
- Traditional instrumentation methods may leave residual smear layer.
Purpose of the Study:
- To compare scanning electron microscopic (SEM) morphology of root canal walls.
- Evaluate manual and mechanical instrumentation with and without Er:YAG laser.
- Assess the efficacy of Er:YAG laser in smear layer removal.
Main Methods:
- Human single-rooted teeth were sectioned.
- Four groups: manual, manual+laser, mechanical, mechanical+laser instrumentation.
- Teeth split longitudinally for SEM evaluation.
Main Results:
- Er:YAG laser application demonstrated effectiveness in smear layer removal.
- SEM analysis revealed cleaner root canal walls with laser treatment.
Conclusions:
- Smear layer removal is essential for successful endodontic therapy.
- Er:YAG laser combined with rotary and manual techniques enhances root canal cleanliness.
- Laser-assisted endodontics offers improved root canal debridement.