Marginal leakage evaluation of three endodontic sealers according to the moment of post preparation

Abstract

Objectives: The purpose of this in vitro study was to evaluate the coronal marginal leakage after post space preparation in teeth filled with three different sealers, according to the period between the root canal filling and preparation of post space. Methods: Ninety human teeth recently extracted were cleaned and shaped and then filled with Sealapex, Endométhazone or TopSeal. Gates Glidden drills were used for immediate post space preparation of 10 teeth with each sealer until 5 mm of filling were left. Sixty filled roots were incubated at 37 oC in wet environment during 30 and 60 days to have, then, the post space prepared as previously. The external surface of each root was covered with Araldite™. The specimens were immersed in 2% methylene blue dyer under vacuum for 24h; so they could be analyzed. The infiltration was measured by the Sigma Scan (Jandel Scientific) software from the upper part of the obturation to the most apical point reached by the dyer. Results: Sealapex and TopSeal showed smaller infiltration after post space preparation than Endométhazone; Immediate post space preparation showed smaller infiltration than post space preparation after 30 and 60 days of the root canal filling.