The purpose of this study was to investigate the microleakage in orifice
barrier resin modified glass ionomer, resin modified glass ionomer nano and resin
composite core build up.
This study was used 30 extracted humand mandibullary premolars were
divided into 3 groups each consisting of 10 teeth, and 10 teeth for the control
group which is divided into 5 teeth for positive control and five teeth for negative
control. For the control group did not apply orifice barrier material. All teeth were
prepared with the Crown Down technique, and were obturated using Protaper guta
perca and resin sealer. After sealer set, about 4mm of gutta percha was removed
from root canal orifice and then group I was applied orifice barrier material resin
modified glass ionomer, group II was applied resin modifiefd glass ionomer nano
and group III was applied resin composite core build up, for positive and negative
control groups did not apply orifice barrier materials. All the subject of the
research were thermocycled for 500 cycles at temperature 5 ° and 55 ° for 30
seconds, then immersed in a methylene blue for 5 days and after that all te subject
were sectioned in a mesiodistal direction. Microleakage was measured with
microscope stereo with 60x magnification.
ANAVA results showed that orifice barier materials resin modified glass
ionomer, resin modifiefd glass ionomer nano and resin composite core build up
influenced the microleakage of the tooth after root canal treatment. LSD results
showed that there were significant differences in microleakage between the orifice
barrier resin modified glass ionomer and resin modified glass ionomer nano, and
also resin modified glass ionomer nano with resin composite core build up (p
<0.05), and there were no difference between the orifice barrier resin modified
glass ionomer nano with resin composite core build up (p > 0.05).
In this study, it was concluded that aplication of orifice barrier resin
modified glass ionomer cement, resin modified glass ionomer cement nano and
resin composite core build up influenced the microleakage of the tooth after root
canal treatment