Schirrmeister, Jörg F Efficacy of different rotary instruments for gutta-percha removal in root canal retreatment. [electronic resource] - Journal of endodontics May 2006 - 469-72 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0099-2399 Standard No.: 10.1016/j.joen.2005.10.052 doi Subjects--Topical Terms: BicuspidDental InstrumentsGutta-PerchaHumansRetreatmentRoot Canal Filling MaterialsRoot Canal Preparation--instrumentation