Abstract
Introduction: Temporary restorative materials
are placed in access cavity to provide the coronal
seal of the root canal during multi-visits RCT. This
in vitro study was designed to evaluate the coronal
microleakage of four different temporary restorative
materials commonly used in endodontics in
Myanmar, viz., MD.Temp, Orafil, Caviton, Zinc oxide
eugenol.
Materials and Methods : Forty-four extracted human
premolars were selected, and access cavity was
prepared. Pulp chambers were filled with wet cotton
pellets leaving approximately 4 mm coronally. Forty
teeth were randomly divided into four experimental
groups equally. The remaining four teeth were equally
divided into two control groups. Access cavities in
each group were filled with one of the above tested
materials, and immediately put into the water. Tooth
surfaces except occlusal surface were then coated
with nail varnish. Equal parts of 2% methylene blue
and methylated alcohol were mixed to prepare a dye
solution. Samples were immersed in dye for 10 days
at 32 ± 2°C. Teeth were rinsed, dried, and sectioned
mesiodistally and evaluated under a stereomicroscope
at a magnification of 15X for linear dye penetration
along cavity walls. Data were analyzed using KruskalWallis and Tukey HSD tests.
Results : The lowest microleakage value
was observed in MD.Temp and Orafil, and the
highest in Zinc oxide eugenol (ZOE). Caviton was
not statistically different from Orafil and ZOE, but
significantly higher in microleakage than MD.Temp.
Clinical Significance : ZOE which is dissolvable in
alcohol was the least effective material for preventing
microleakage, while MD.Temp and Orafil provided
the best sealing in content of alcohol in this study
