touch with the apical portion of roots. Leakage was evaluated every day, for one hundred twenty days, and was thought of when the tradition medium on the apical portion was rendered turbid. The roots were microscopically analyzed for evaluation of bacterial penetration into the root canals and dentinal tubules. In the leakage check, the Tagger’s hybrid method, exhibited the worst sealing capability. Root canals with 10mm of remaining obturation materials presented better sealing than canals with 5mm. Microscopic evaluation revealed that the lateral
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