Effect of soft chelating irrigation on the sealing ability of GP/AH Plus root fillings

Yi-Suk Yu; Tae-Gun Kim; Kwang-Won Lee; Mi-Kyung Yu

doi:10.5395/JKACD.2009.34.6.484

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Yu, Kim, Lee, and Yu: Effect of soft chelating irrigation on the sealing ability of GP/AH Plus root fillings

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2009; 34(6): 484-490.

Published online: 30 November 2009

DOI: https://doi.org/10.5395/JKACD.2009.34.6.484

Effect of soft chelating irrigation on the sealing ability of GP/AH Plus root fillings

Yi-Suk Yu, Tae-Gun Kim, Kwang-Won Lee, Mi-Kyung Yu

Department of Conservative Dentistry, School of Dentistry, Chonbuk National University, Korea.

Corresponding Author: Mi-Kyung Yu. Department of Conservative Dentistry, School of Dentistry, Chonbuk National University, Geumam-Dong, Deokjin-Gu, Jeonju, Jeonbuk 561-712, Korea. Tel: 82-63-250-2045, Fax: 82-63-250-2049, mkyou102@hanmail.net

Received 24 June 2009 Revised 25 September 2009 Accepted 14 October 2009

(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 effect of soft chelating irrigant on the sealing ability of root fillings by using a glucose leakage test.

A total of 45 single-rooted teeth were selected for the study. The teeth were decoronated leaving a total length of 13mm. The root canals prepared using K3 NiTi rotary instruments to an apical dimension of size 45(0.06 taper). The specimens were then randomly divided into 3 experimental groups of 13 roots each and 2 control groups of 3 roots each. Specimen in each group were prepared with different irrigation protocols : group 1, 2.5% NaOCl; group 2, 2.5% NaOCl and 17% EDTA; group 3, 2.5% NaOCl and 15% HEBP. The root canals were filled with gutta-percha and AH Plus sealer using lateral condensation. After 7 days in 37℃, 100% humidity, the coronal-to-apical microleakage was evaluated quantitatively using a glucose leakage model. The leaked glucose concentration was measured with spectrophotometry at 1, 4, 7, 14, 21 and 28 days.

There was a tendency of increase in leakage in all experimental groups during experimental period. HEBP-treated dentin showed no significant difference with EDTA-treated dentin during experimental period. From the 21th day onward, HEBP-treated dentin showed significantly lower leakage than smear-covered dentin. HEBP-treated dentin displayed a similar sealing pattern to EDTA-treated dentin and a better sealing ability than smear-covered dentin. Consequently, a soft chelator(HEBP) could be considered as the possible alternative to EDTA.

Keywords: Sealing ability, Chelating solution, EDTA, HEBP, Leakage, Smear layer

Figures and Tables

Figure 1

Glucose leakage model.

Figure 2

Leakage of positive and negative control groups.

Figure 3

Glucose microleakage of experimental groups.

Table 1

Microleakage of glucose in experimental groups (mM/L)

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