Comparative In-Vitro Evaluation of Er:YAG and Er,Cr:YSGG Lasers for Apical Third Irrigation: Effects on Smear Layer Removal and Temperature Rise

Description :

The primary purpose of using lasers in endodontics is to remove the smear layer and disinfect the root canal system while ideally, ensuring that the temperature rise will not exceed 10°C above body temperature in only one minute. (3) The study explores the ability of Er:YAG and Er,Cr:YSGG lasers to activate the irrigation, leading to better smear layer removal, while ensuring that the temperature rise is less than 10°C per minute. Many studies have examined the safety and effectiveness of lasers in endodontics: (3) Gutknecht et al. found that using an 810 nm diode laser with specific settings did not increase tissue temperature by more than 7°C, ensuring safety. (4) Hmud et al. reported that 940 and 980 nm lasers caused a maximum root surface temperature rise of 4°C, confirming their safe use. (5) George and Walsh showed that Er:YAG and Er,Cr:YSGG lasers raised apical third temperatures by less than 2.3°C, with conical fiber tips reducing thermal risks. (6) Franzen et al. demonstrated significant bacterial reduction and smear layer removal with an Er,Cr:YSGG laser, without thermal damage. (7) Martins et al. found Er,Cr:YSGG lasers with radial firing tips achieved predictable outcomes in necrotic teeth. (8) Al-Karadaghi showed dual-wavelength lasers improved smear layer removal and dentin permeability compared to single-laser setups. (9) Many studies have investigated the effectiveness of different methods for smear layer and debris removal in endodontics: Rödig et al., Urban et al., and Kharouf et al. demonstrated that sonic activation (EQ-s) and ultrasonic irrigation (Endoultra) effectively remove more

Titulaire :
ZOGHEIB MOUBARAK Carla

Contact USJ :
carla.zogheibmoubarak@usj.edu.lb

Chercheur(s) :
Dr Carla ZOGHEIB MOUBARAK

Projet présenté au CR, le : 01/06/2025

Projet achevé auprès du CR : 01/06/2026