J Korean Acad Conserv Dent.  2009 Nov;34(6):484-490. 10.5395/JKACD.2009.34.6.484.

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

• Yu YS
• Kim TG
• Lee KW
• Yu MK

• KMID: 1986611
• DOI: http://doi.org/10.5395/JKACD.2009.34.6.484

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 37degrees C, 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.

Keyword

Sealing ability; Chelating solution; EDTA; HEBP; Leakage; Smear layer

MeSH Terms

Dental Pulp Cavity
Dentin
Edetic Acid
Epoxy Resins
Glucose
Gutta-Percha
Humidity
Root Canal Filling Materials
Smear Layer
Spectrophotometry
Tooth
Edetic Acid
Epoxy Resins
Glucose
Gutta-Percha
Root Canal Filling Materials

Figure

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  Figure 1 Glucose leakage model.

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  Figure 2 Leakage of positive and negative control groups.

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  Figure 3 Glucose microleakage of experimental groups.

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