In vitro evaluation of the sealing ability of MTA used for the repair of furcation perforations with and without the use of an internal matrix

ObjectiveTo evaluate the effect of matrix on mineral trioxide aggregate (MTA) when used to repair furcal perforations.Study designForty-five human molars with furcal perforations were randomly divided into 3 groups and repaired with MTA either alone or over a barrier (calcium sulfate or Collaplug). Eight teeth without perforations provided negative control samples. After assessing repair quality, 1 mol/L glucose solution was used as the tracer to detect the leakage. The concentration of leaked glucose was measured after 1, 2, 4, 7, 15, and 20 days using a glucose oxidase method.ResultsNo significant difference in either leakage or overfilling was found between the groups with Collaplug and MTA alone (P > .05). Although no overfilling was detected in the group with calcium sulfate, that group had the most leakage (P < .05).ConclusionsNeither of the 2 internal matrices improved the sealing ability and reduced the incidence of overfilling simultaneously.