Apical and coronal sealing ability of single cone obturated root canals with MTA and a new endodontic material

Objective: The purpose of this study was to evaluate the sealing ability of single cone
gutta-percha filling with a new endodontic cement or mineral trioxide aggregate as
root canal sealer in extracted single rooted human teeth.
Materials And methods: Thirty-six human teeth with single canals were prepared in
a standard manner using light speed instruments, randomly divided into 2
experimental groups of 12 teeth each and 2 control groups. The samples were
obturated as mentioned above. The roots stored in 100% humidity and 37°C for 24h
and were then immersed in 1% Methylene blue dye and centrifuged at 3000rpm in
5min. The teeth were splited and the linear extent of dye penetration was measured
with a stereomicroscope at the apical and coronal sides. Data were analyzed by the
one-way ANOVA followed by t-test.
Result: Canals filled with the new endodontic material showed significantly less
coronal dye penetration than canals obturated with mineral trioxide aggregate
(P<0.001). There was no statistically significant difference in apical micro-leakage
between experimental groups.
Conclusion: based on the results and limitations of this in vitro study, single cone
obturation with the new endodontic material provides better coronal seal than MTA.
Keywords: Sealing ability, Coronal, Apical, MTA, New material, Dye leakage