Author/Authors :
Khoshbin, Elham Department of Endodontics - School of Dentistry, Hamadan University of Medical Sciences, Hamadan , Donyavi, Zakiyeh Department of Endodontics - School of Dentistry, Hamadan University of Medical Sciences, Hamadan , Abbasi Atibeh, Erfan Department of Periodontics - School of Dentistry, Alborz University of Medical Sciences, Karaj , Kasraei, Shahin Department of Restorative Dentistry - School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran , Yousefimashouf, Rasoul Department of Microbiology - Hamadan University of Medical Sciences, Hamadan , Roshanaei, Ghodratollah Department of Biostatistics and Epidemiology - School of Public Health, Hamadan University of Medical Sciences, Hamadan , Amani, Faranak Department of Endodontics - School of Dentistry, Alborz University of Medical Sciences, Karaj
Abstract :
Objectives: Laser irradiation, as an adjunct to root canal preparation, may increase the success rate of endodontic treatments. This study aimed to assess the effect of neodymium- doped yttrium aluminum garnet (Nd:YAG) and diode lasers on the apical seal of the root canals filled with AH Plus® and mineral trioxide aggregate (MTA)-based sealers.
Materials and Methods: This in-vitro experimental study was conducted on 96 single- rooted, single-canal extracted human teeth with closed apices. The root canals were prepared by using ProTaper® rotary instruments and were randomly divided into six groups (n=16): 940-nm diode laser and AH Plus® sealer (group 1), Nd:YAG laser and AH Plus® sealer (group 2), AH Plus® sealer (group 3), 940-nm diode laser and MTA- based sealer (group 4), Nd:YAG laser and MTA-based sealer (group 5), MTA-based sealer (group 6), as well as positive and negative control groups. A bacterial leakage model was used for microleakage assessment. Qualitative assessment was done by using a scanning electron microscope (SEM). Data were analyzed by two-way analysis of variance (ANOVA) at the significance level of 0.05.
Results: There were statistically significant differences between the experimental and control groups (P=0.002). The laser-treated groups showed a lower apical microleakage compared to the non-laser-treated groups, although the difference was not statistically significant (P>0.05). No significant differences were noted between the two lasers in terms of the apical microleakage, irrespective of the type of sealer (P>0.05).
Conclusions: Laser irradiation, as an adjunct to root canal preparation, has no significant effect on the level of apical microleakage
