OR44 - The Effectiveness of EndoSequence BC Liner as an Intraorifice Barrier: A Descriptive Pilot Study

It is common in endodontic practice to place an intraorifice barrier over obturated canal orifices ro prevent contamination if the provisional restoration is displaced prior to placement of a permanent restoration. Currently, no guidance exists regarding how long these intraorifice barriers will protect obturated root canals against leakage contamination. The purpose of this study was to investigate the length of time EndoSequence BC Liner (ESBCL; Brasseler USA, Savannah, GA) used as an intraorifice barrier is effective in preventing leakage. 20 extracted, single-rooted teeth received in vitro non-surgical root canal treatment followed by placement of 2 mm thickness ESBCL intraorifice barrier or no barrier. The access cavity of all teeth were exposed to 1 M glucose using a glucose leakage model and a glucose assay kit that has previously been described in endodontic literature. At 1, 2, 4, and 8 weeks there was no statistical difference in glucose leakage between the intraorifice barrier and no barrier groups. The results of this study indicate that ESBCL as an intraorifice barrier is ineffective in preventing glucose leakage. However, it is unclear if the tested material was ineffective in preventing leakage or if the glucose leakage model itself is an ineffective method to test leakage.