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Laser-activated irrigation versus ultrasonic or syringe irrigation for smear layer and debris removal: An in vitro
Nikita Aji Mannur1, Saloni Bharti2, Monica Sinha3
1Department of Conservative Dentistry and Endodontics, SJM Dental College & Hospital, Chitradurga, Karnataka, India.
Abstract:
Effective removal of smear layer and debris is essential for predictable endodontic disinfection, yet conventional irrigation remains insufficient, particularly in the apical third. Therefore, it is of interest to compare laser-activated irrigation (LAI), passive ultrasonic irrigation (PUI) and conventional syringe irrigation (CSI) using SEM evaluation of ninety single-rooted teeth. LAI demonstrated significantly lower smear layer and debris scores across all canal thirds compared to PUI and CSI (p<0.001). Complete debris removal throughout the canal was achieved in 93.3% of LAI samples versus 73.3% for PUI and 43.3% for CSI. Thus, laser-activated irrigation produced more consistent apical cleaning, indicating superior hydrodynamic activation efficiency.
