AN IN-VITRO EVALUATION OF CORONAL MICROLEAKAGE IN OBTURATED ROOT CANALS WITHOUT CORONAL RESTORATIONS

A study was conducted to evaluate coronal microleakage of Super EBA an d Ketac-Endo when used as sealers with single-cone gutta-percha (GP) r oot canal obturation, The root canals of 24 extracted human teeth were instrumented with flared preparations to a minimum #40 master apical file size, Ten teeth were obturated with a single GP cone and Super EB A as the sealer and ten teeth were obturated with a single GP cone and Ketac-Endo as the sealer, Four teeth were used as controls, Salivary bacterial microleakage studies were conducted to determine whether the se sealers could prevent coronal microleakage through the root canal i n the absence of a coronal tooth restoration. There was no bacterial p enetration through the apical foramen for either sealer tested during the 60-day test period.