title: [The realization of a wear-timing device for clarifying the scientific questions presented in orthodontics].
abstract: A timing device for removable orthodontic appliances is described. The measurement system includes a quartz digital clock at the timer. A reed switch serves as a sensor and is activated by a magnetic device fastened directly or by an orthodontic band to a molar tooth. A changeover reedswitch prevents manipulation by the patient. As a timing device the system provides great accuracy. The high-speed capability of the device permits further scientific application: Installation of two timing devices in a single Bionator permits selective timing (e.g. biting contact during wear of the appliance).
authors.affiliation: Poliklinik für Kieferorthopädie der Universität Würzburg.
authors.forename: G
authors.initials: G
authors.lastname: Sahm
mesh_terms: D000202:Activator Appliances; D004582:Electronics, Medical / Q000295:instrumentation; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D006801:Humans; D009967:Orthodontic Appliances; D013997:Time Factors
vernacular_title: Vorstellung eines Tragezeitmessers zur Abklärung wissenschaftlicher Fragestellungen in der Kieferorthopädie.