Zand, Vahid A comparative SEM investigation of the smear layer following preparation of root canals using nickel titanium rotary and hand instruments. [electronic resource] - Journal of oral science Mar 2007 - 47-52 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1343-4934 Standard No.: 10.2334/josnusd.49.47 doi Subjects--Topical Terms: Dental AlloysDental InstrumentsEquipment DesignHumansMicroscopy, Electron, ScanningNickelRoot Canal Preparation--instrumentationSmear LayerTitanium