Abstract
BackgroundVarious materials have been added to mineral trioxide aggregate to enhance its properties. This study was aimed to compare the sealing efficacy of MTA with and without nanosilver using bacterial leakage approach.Material and MethodsSeventy canine teeth were prepared and obturated. Then, after apical resection, the root-end cavities were prepared by ultrasonic retrotips. Teeth were randomly divided into 4 groups containing two experimental groups (n=30) and two negative and positive controls (n=5). In group 1 and 2, root-end cavities were respectively filled with MTA and MTA with nanosilver (by 1% weight). Leakage assessment was carried out by bacterial leakage apparatus with Enterococcus faecalis species. Leakage comparison between experimental groups was done using Mann-Whitney test by Spss 16 software at significancy level of 0.05.ResultsThe median bacterial leakages for MTA and MTA with nanosilver were 19 and 2, respectively. The mean bacterial leakages for MTA and MTA with nanosilver were 30.06±28.67 and 9.66±14.25, respectively. Mann-Whitney test indicated that there was a significant difference in bacterial leakage day between two experimental groups (P=0.002).ConclusionsBased on the findings of this in-vitro bacterial leakage study, adding nanosilver to MTA decreased its sealing ability. Key words:Root canal therapy, root canal obturation, root canal filling materials, nanosilver, MTA.
Highlights
Endodontic failures are almost associated with incomplete cleaning of root canal system and penetration of bacteria and other pathogens into the periradicular tissues [1]
Fluid filtration bear greater accuracy, clinical similarity of the bacterial leakage method is more than fluid filtration [9]; bacterial leakage was used in this study
The median bacterial leakages in experimental samples and ranges and mean bacterial leakage days and standard deviations are shown in table 1 and figure 2
Summary
Endodontic failures are almost associated with incomplete cleaning of root canal system and penetration of bacteria and other pathogens into the periradicular tissues [1]. Root-end filling materials should have antimicrobial activity to inhibit microbial growth in addition to appropriate sealing ability and biocompatibility [1]. Various materials such as glass ionomer, Super-EBA, amalgam, composite, and recently mineral trioxide aggregate (MTA) have been utilized for filling root-end cavities [2]. Based on the previous studies which depicted desirable properties of the MTA and nanosilver mixture, this study was aimed to evaluate the sealing efficacy of MTA with and without nanosilver in root end cavities prepared by ultrasonic. This study was aimed to compare the sealing efficacy of MTA with and without nanosilver using bacterial leakage approach. Conclusions: Based on the findings of this in-vitro bacterial leakage study, adding nanosilver to MTA decreased its sealing ability
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