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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Original Article 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; Journal of Korean Academy of Conservative Dentistry 2009;34(6):484-490.
DOI: https://doi.org/10.5395/JKACD.2009.34.6.484
Published online: November 30, 2009

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: June 24, 2009 • Revised: September 25, 2009 • Accepted: October 14, 2009

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Abstract
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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

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

J Korean Acad Conserv Dent. 2009;34(6):484-490. Published online November 30, 2009

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

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

Figure 1 Glucose leakage model.

Figure 2 Leakage of positive and negative control groups.

Figure 3 Glucose microleakage of experimental groups.

Figure 1

Figure 2

Figure 3

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

Table 1

Microleakage of glucose in experimental groups (mM/L)

Table 1 Microleakage of glucose in experimental groups (mM/L)