In vitro comparison of coronal microleakage between Resilon alone and gutta-percha with a glass-ionomer intraorifice barrier using a fluid filtration model.

The prevention and control of coronal microleakage is critical for successful endodontic outcomes. The purpose of this study was to compare coronal microleakage between Resilon alone and gutta-percha with a glass ionomer intraorifice barrier using a fluid filtration model. Thirty-four extracted human teeth were decoronated, prepared to a standardized length of 16 mm, and instrumented to a .06 taper ISO size 40. After removal of controls, the remaining roots were randomly divided into two equal groups of 15 and obturated with either Resilon alone or gutta-percha with a 2-mm glass-ionomer intraorifice barrier. After set of the sealers, the teeth were evaluated for microleakage using a fluid filtration model. A Student t test found significantly less leakage for the gutta-percha/glass-ionomer intraorifice barrier group than the Resilon alone group (p = 0.008).