J Korean Acad Conserv Dent.  2003 Jan;28(1):50-56. 10.5395/JKACD.2003.28.1.050.

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

• Kwon JS
• Lee HJ
• Hur B

• KMID: 2117430
• DOI: http://doi.org/10.5395/JKACD.2003.28.1.050

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).

Keyword

EDTA; ND:YAG laser; Smear layer; Microleakage

MeSH Terms

Dental Pulp Cavity
Edetic Acid*
Smear Layer
Tooth
Edetic Acid

Figure

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  Fig. 1 Group A(2.5% NaOCl)

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  Fig. 2 Group B(17% EDTA)-Middle 1/3

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

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  Fig. 4 Group C(1W, 100mJ, 10Hz Nd: YAG laser, parallel to canal wall

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  Fig. 5 Group D(2W, 100mJ, 20Hz Nd: YAG laser, parallel to canal wall

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  Fig. 6 Additional specimen(1W, 100mJ, 10Hz Nd:YAG laser, perpendicular to canal wall

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  Fig. 7 Additional specimen(2W, 100mJ, 20Hz Nd:YAG laser, perpendicular to canal wall

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