title: [The cleaning effect of different root canal instruments. A semiquantitative comparative study].
abstract: The efficacy of various root canal cleaning instruments was evaluated in this in vitro study. 60 freshly extracted teeth were divided into 6 groups of 10 teeth each. The root canals of the teeth were cleaned with hand-instruments, sonic instruments (Sonic Air 3000 and Endostar 5), mechanical instruments (Canalfinder System), and ultrasonic instruments (Cavi-Endo with or without integrated rinsing) according to the manufacturer's instructions. The canals were then examined in a SEM at 60 selected points to assess the presence or absence of smear layer, dentin chips, and cellular remnants. The smoothness of the canal walls was also evaluated. Similar amounts of tissue remnants were scored by the SEM method. None of the instruments tested were able to produce debris-free specimens. The Cavi-Endo, Endostar 5, Sonic Air 3000, and the hand-instruments yielded similar scores. However, the Endostar 5 cleaned the canals quicker and with fewer problems than the other instruments. The efficacy of the integrated rinsing in the Cavi-Endo must be questioned. The smear layer was somewhat reduced by the Cavi-Endo, using a syringe and needle, but without the integrated spray. The Canalfinder System produced poorer cleaning scores but they were not significantly different from the other instruments' scores.
authors.affiliation: Abteilung für Präventivzahnmedizin, Parodontologie und Kariologie, Zahnärztliches Institut der Universität Zürich.
authors.forename: C W
authors.initials: CW
authors.lastname: Schädle
authors.forename: P
authors.initials: P
authors.lastname: Velvart
authors.forename: F
authors.initials: F
authors.lastname: Lutz
mesh_terms: D003786:Dental Pulp Cavity / Q000648:ultrastructure; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D006801:Humans; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D012390:Root Canal Therapy / Q000295:instrumentation*
vernacular_title: Die Reinigungswirkung verschiedener Wurzelkanal-Instrumente. Eine semiquantitative Vergleichsstudie.