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. 2018 Jan;15(1):30-40.

Effect of Nd:YAG and Diode Lasers on Apical Seal of Root Canals Filled with AH Plus and Mineral Trioxide Aggregate-Based Sealers

Elham Khoshbin  1 , Zakiyeh Donyavi  1 , Erfan Abbasi Atibeh  2 , Shahin Kasraei  3 , Rasoul Yousefimashouf  4 , Ghodratollah Roshanaei  5 , Faranak Amani  6
Affiliations

Effect of Nd:YAG and Diode Lasers on Apical Seal of Root Canals Filled with AH Plus and Mineral Trioxide Aggregate-Based Sealers

Elham Khoshbin et al. J Dent (Tehran). 2018 Jan.

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.

Keywords: Endodontic Sealer; Lasers; Root Canal Obturation.

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Figures

Fig. 1:
Fig. 1:
The percentage of apical bacterial microleakage incidence in study groups over 90 days
Fig. 2:
Fig. 2:
SEM micrographs of group 1 (diode laser and AH Plus® sealer). (1A) ×25 magnification. (1B) ×300 magnification. (1C) ×700 magnification. SEM micrographs of group 2 (Nd:YAG laser and AH Plus® sealer). (2A) ×25 magnification. (2B) ×300 magnification. (2C) ×700 magnification. SEM micrographs of group 3 (no laser, AH Plus® sealer). (3A) ×25 magnification. (3B) ×300 magnification. (3C) ×700 magnification
Fig. 3:
Fig. 3:
SEM micrographs of group 4 (diode laser, MTA-based sealer). (4A) ×25 magnification. (4B) ×300 magnification. (4C) ×700 magnification. SEM micrographs of group 5 (Nd:YAG laser, MTA-based sealer). (5A) ×25 magnification. (5B) ×300 magnification. (5C) ×700 magnification. SEM micrographs of group 6 (no laser, MTA-based sealer). (6A) ×25 magnification. (6B) ×300 magnification. (6C) ×700 magnification
Fig. 4:
Fig. 4:
SEM micrographs of the negative control group. (7A) ×25 magnification. (7B) ×300 magnification. (7C) ×700 magnification. SEM micrographs of the positive control group. (8A) ×300 magnification. (8B) ×700 magnification
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