title: [Clinical study of electrical root canal length instruments].
abstract: In a clinical study on 100 root canals we measured the difference between the length, which can be received by a roentgenogramme, and the length, which can be received by an electrical device. In cases with vital exstirpation in 80% we got a good conincidence, but in cases of pulp gangraena there were great differences. Indication of electrical devices for measuring tooth length only can be seen together with an existing X-ray; it is very important, whether the canal is dry enough for exact measuring.
authors.affiliation: Poliklinik für Zahnerhaltung B der Westfälischen Wilhelms-Universität.
authors.forename: H
authors.initials: H
authors.lastname: Hartanto
authors.forename: K H
authors.initials: KH
authors.lastname: Ott
mesh_terms: D000293:Adolescent; D000328:Adult; D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D006801:Humans; D008875:Middle Aged; D009811:Odontometry; D011859:Radiography; D012390:Root Canal Therapy / Q000295:instrumentation; D014092:Tooth Root / Q000033:anatomy & histology*
vernacular_title: Klinische Untersuchungen zur elektrischen Wurzelkanallängenbestimmung.