title: Efficacy of two techniques for endodontic instrumentation.
abstract: The aim of the present study was to compare the quality of preparation in curved and straight root canals employing 2 techniques, i.e. the step-back technique and the technique of Goerig, Michelich and Schultz. One hundred and thirty single-rooted human teeth were employed throughout. The walls of the root canals of these teeth were painted. Following instrumentation the roots were sectioned longitudinally. The sections were observed under a stereoscopic microscope SZ40 with a grid fitted in the eyepiece. The efficacy of instrumentation was evaluated using area of paint removed as the end-point. Statistical significance of the data was tested with the chi square test employing the Epi Info 5 software. There was no statistically significant difference between techniques for straight canals. The technique of Goerig, Michelich and Schultz was more effective than the step-back technique in the apical third of curved canals.
authors.affiliation: Faculty of Dentistry, National University of Tucumán, Argentina.
authors.forename: D
authors.initials: D
authors.lastname: Naigeboren
authors.forename: M A
authors.initials: MA
authors.lastname: Bulacio
authors.forename: M L
authors.initials: ML
authors.lastname: de la Casa
authors.forename: L
authors.initials: L
authors.lastname: Leonardi
authors.forename: L
authors.initials: L
authors.lastname: Costa
mesh_terms: D016009:Chi-Square Distribution; D004396:Coloring Agents; D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D004867:Equipment Design; D006801:Humans; D011672:Pulpotomy; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods*; D016896:Treatment Outcome
chemical_list: D004396:Coloring Agents