Sealing efficacy of mineral trioxide aggregate with and without nanosilver for root end filling: Anin vitrobacterial leakage study.
BACKGROUND
Various 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.


METHODS
Seventy 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 withEnterococcus faecalisspecies. Leakage comparison between experimental groups was done using Mann-Whitney test by Spss 16 software at significancy level of 0.05.


RESULTS
The 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).


CONCLUSIONS
Based on the findings of thisin-vitrobacterial leakage study, adding nanosilver to MTA decreased its sealing ability.Key words:Root canal therapy, root canal obturation, root canal filling materials, nanosilver, MTA.
Assistant professor, Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Mahsa
M
Eskandarinezhad
Post-graduate student, Department of Pediatric Dentistry, Faculty of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran.
Naiemeh
N
Shahveghar-Asl
Assistant professor, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Reza
R
Sharghi
Research Fellow and Lecturer, Dental and Periodontal Research Center, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran; Assistant Professor, Department of Community Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Sajjad
S
Shirazi
Assistant professor, Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Sahar
S
Shakouie
Assistant professor, Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Amin-Salem
AS
Milani
Assistant Professor, Department of Community Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Esrafil
E
Balaei