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The effects of EDTA and pulsed Nd:YAG laser on apical leakage of canal obturation


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The effects of EDTA and pulsed Nd:YAG laser on apical leakage of canal obturation

Article information

Restor Dent Endod. 2003;28(1):50-56
Publication date (electronic) : 2003 January 31
doi : https://doi.org/10.5395/JKACD.2003.28.1.050
Jin-Soo Kwon, Hee-Joo Lee, Bock Hur
Department of Conservative dentistry, Collage of Dentistry, Pusan National University, Korea.
Corresponding author (hjolee@pusan.ac.kr)

Abstract

The purpose of this study was to evaluate the effects of EDTA and pulsed Nd:YAG laser on apical leakage of canal obturation. Forty-eight single-rooted teeth were used in this study. The teeth were instrumented up to a size 40 K-file and irrigated with 2.5% NaOCl between each file size. And the teeth were divided into 4 groups. In group A, the root canals were irrigated with a final flush of 5ml 2.5% NaOCl as a control group. The teeth in group B were irrigated with a final flush of 5ml 17% EDTA. The teeth in group C and D were irradiated by pulsed Nd:YAG laser(laser parameters were set at 1W, 100mJ, 10Hz, and 2W, 100mJ, 20Hz respectively).

The results were as follows:

1. Apical leakage was observed in 50% of samples in group A, 30% of samples in group B, 20% of samples in group C, and 10% of samples in group D.

2. The teeth in group B had less leakage than group A, but there was no statistically significant differences(p>0.05).

3. The teeth in group C, D had less leakage than group A, and there was statistically significant differences(p<0.05).

4. The teeth in group C, D had less leakage than group B, but there was no statistically significant differences(p>0.05).

5. There was no significant differences in apical leakage between group C and group D(p>0.05).

Keywords: EDTA; ND:YAG laser; Smear layer; Microleakage

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Article information Continued

Copyright © 2003 Korean Academy of Conservative Dentistry
(open-access) :

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Fig. 1

Fig. 1

Group A(2.5% NaOCl)

Fig. 2

Fig. 2

Group B(17% EDTA)-Middle 1/3

Fig. 3

Fig. 3

Group B(17% EDTA)-Apical 1/3

Fig. 4

Fig. 4

Group C(1W, 100mJ, 10Hz Nd: YAG laser, parallel to canal wall

Fig. 5

Fig. 5

Group D(2W, 100mJ, 20Hz Nd: YAG laser, parallel to canal wall

Fig. 6

Fig. 6

Additional specimen(1W, 100mJ, 10Hz Nd:YAG laser, perpendicular to canal wall

Fig. 7

Fig. 7

Additional specimen(2W, 100mJ, 20Hz Nd:YAG laser, perpendicular to canal wall

Table 1

Classification of groups

Table 1

Table 2

Criteria for degree of dye penetration

Table 2

Table 3

Score for apical leakage

Table 3