Effectiveness of different techniques for removing gutta-percha during retreatment.


AIM To evaluate the effectiveness of various techniques for removing filling material from root canals in vitro. METHODOLOGY Eighty extracted mandibular premolar teeth were selected for the study. The teeth were root filled using thermomechanical compaction of gutta-percha. After 8 months, the filling material was removed and canals were reinstrumented… (More)