title: [A retrospective evaluation of the treatment of skeletal Class-II with removable appliances].
abstract: Pre- and post-treatment lateral radiographs of 120 former patients with skeletal class II, who had been treated with either an Andresen/Häupl type activator or bite jumping plates, were selected for this study. The evaluation results showed that bite jumping plates had a significant inhibition on the forward downward growth and the anterior rotation of the maxilla. The increase of the SNB-angle was significantly higher and there was also more posterior rotation of the maxilla in those patients, who had been treated with an activator. A two-way analysis of variance was carried out and it was possible to show that the independent treatment factors explained only 1/5 to 1/3 of the overall variance of the sample. The differences among the patients seem to depend more on individual growth patterns than just on the type of removable appliance.
authors.affiliation: Poliklinik für Kieferorthopädie, Universität zu Köln.
authors.forename: H
authors.initials: H
authors.lastname: Fischbach
authors.forename: B
authors.initials: B
authors.lastname: Kahl-Nieke
mesh_terms: D000202:Activator Appliances / Q000706:statistics & numerical data; D000704:Analysis of Variance; D002508:Cephalometry; D002648:Child; D003766:Dental Occlusion; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000000981:diagnostic imaging / Q000628:therapy*; D011859:Radiography; D012189:Retrospective Studies; D013997:Time Factors
vernacular_title: Retrospektive Bewertung von Behandlungen der skelettalen Klasse II mit herausnehmbaren Geräten.