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

Jin-Soo Kwon; Hee-Joo Lee; Bock Hur

doi:10.5395/JKACD.2003.28.1.050

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Kwon, Lee, and Hur: The effects of EDTA and pulsed Nd:YAG laser on apical leakage of canal obturation

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2003; 28(1): 50-56.

Published online: 31 January 2003

DOI: https://doi.org/10.5395/JKACD.2003.28.1.050

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

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)

(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.

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

Figures and Tables

Fig. 1

Group A(2.5% NaOCl)

Fig. 2

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

Fig. 3

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

Fig. 4

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

Fig. 5

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

Fig. 6

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

Fig. 7

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

Table 1

Classification of groups

Table 2

Criteria for degree of dye penetration

Table 3

Score for apical leakage

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