title: [A clinical study of the effect of a rigid open activator (ROA) in the treatment of Angle class II.1].
abstract: The study introduces a maximally weight and volume reduced rigid open activator (ROA) for wear by patients with Angle class II.1 deformities. The activator is worn from about the age of 9 until the end of the eruption of the permanent canines and the first and second premolars. Intensive wear of the activator leads to regular occlusion after only 4 months. Cephalometric parameters at the beginning of treatment compared with those following regular occlusion document and illustrate the impressive adaptation of the masticatory system achieved through wear of the ROA.
authors.affiliation: I. Stomatologische Klinik, Medizinische Fakultät, Komensky-Universität Bratislava, Slowakei.
authors.forename: A
authors.initials: A
authors.lastname: Bachratý
authors.forename: L
authors.initials: L
authors.lastname: Bachratá
mesh_terms: D000202:Activator Appliances / Q000706:statistics & numerical data; D000293:Adolescent; D002508:Cephalometry / Q000706:statistics & numerical data; D002648:Child; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D011859:Radiography; D013997:Time Factors
vernacular_title: Klinische Studie zur Wirkung des starren offenen Aktivators (ROA) bei der Behandlung der Angle-Klasse II,1.