J Korean Acad Conserv Dent.  2006 Mar;31(2):119-124. 10.5395/JKACD.2006.31.2.119.

The effect of MTAD on the apical leakage of obturated root canals: an electrochemical study

• Park DS

• KMID: 1986857
• DOI: http://doi.org/10.5395/JKACD.2006.31.2.119

Abstract

The purpose of this study was to evaluate the effect of newly developed endodontic root canal cleanser (MTAD) on the apical leakage of obturated root canal using an electrochemical method. Canals of 60 extracted single-rooted human teeth were prepared by using a crown-down technique with rotary nickel-titanium files. In Group 1 (positive control group) and 2 (negative control group), 5.25% NaOCl was used as a canal irrigant and no canal wall treatment was done. In group 3, only 5.25% NaOCl were used as canal irrigant, canal wall treatment and final rinse. In group 4, specimens were irrigated with 5.25% NaOCl, treated with 5 ml of 17% EDTA for 5 minutes and final rinsed with 5.25% NaOCl. Specimens of group 5 were irrigated with 1.3% NaOCl and treated with 5 ml of MTAD for 5 minutes. All root canals are dried with paper points and obtuated with gutta-percha and AH plus as a sealer using a continuous wave of condensation technique except in the group 1. The electrical resistance between the standard and experimental electrodes in canals was measured over a period of 10 days. Rising of apical leakage with time was observed for all the groups. Group 4 and 5 showed lower apical leakage than group 3 but differences between the group 3, 4 and 5 were no statistical significance at any measurement time.

Keyword

Smear layer; Electrochemical method; Apical leakage; Root canal irrigant

MeSH Terms

Dental Pulp Cavity*
Edetic Acid
Electric Impedance
Electrodes
Gutta-Percha
Humans
Smear Layer
Tooth
Edetic Acid
Gutta-Percha

Figure

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  Figure 1 A schematic drawing of test system.

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  Figure 2 Variation of apical leakage of groups with time.

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