Document Detail

Success rate and efficiency of activator treatment.
MedLine Citation:
PMID:  17878188     Owner:  NLM     Status:  MEDLINE    
In a retrospective multicentre study, the success rate and efficiency of activator treatment were analysed. All patients from two University clinics (Giessen, Germany and Berne, Switzerland) that fulfilled the selection criteria (Class II division 1 malocclusion, activator treatment, no aplasia, no extraction of permanent teeth, no syndromes, no previous orthodontic treatment except transverse maxillary expansion, full available records) were included in the study. The subject material amounted to 222 patients with a mean age of 10.6 years. Patient records, lateral head films, and dental casts were evaluated. Treatment was classified as successful if the molar relationship improved by at least half to three-fourths cusp width depending on whether or not the leeway space was used during treatment. Group comparisons were carried out using Wilcoxon two-sample and Kruskal-Wallis tests. For discrete data, chi-square analysis was used and Fisher's exact test when the sample size was small. Stepwise logistic regression was also employed. The success rate was 64 per cent in Giessen and 66 per cent in Berne. The only factor that significantly (P < 0.001) influenced treatment success was the level of co-operation. In approximately 27 per cent of the patients at both centres, the post-treatment occlusion was an 'ideal' Class I. In an additional 38 per cent of the patients, marked improvements in occlusal relationships were found. In subjects with Class II division 1 malocclusions, in which orthodontic treatment is performed by means of activators, a marked improvement of the Class II dental arch relationships can be expected in approximately 65 per cent of subjects. Activator treatment is more efficient in the late than in the early mixed dentition.
Christoph Casutt; Hans Pancherz; Manfred Gawora; Sabine Ruf
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Publication Detail:
Type:  Comparative Study; Journal Article; Multicenter Study     Date:  2007-09-18
Journal Detail:
Title:  European journal of orthodontics     Volume:  29     ISSN:  0141-5387     ISO Abbreviation:  Eur J Orthod     Publication Date:  2007 Dec 
Date Detail:
Created Date:  2007-12-06     Completed Date:  2008-03-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7909010     Medline TA:  Eur J Orthod     Country:  England    
Other Details:
Languages:  eng     Pagination:  614-21     Citation Subset:  D; IM    
Department of Orthodontics, University of Giessen, Germany.
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MeSH Terms
Activator Appliances* / classification
Dental Models
Dental Occlusion
Dental Records
Dentition, Mixed
Malocclusion, Angle Class II / pathology,  therapy
Mandible / pathology
Maxilla / pathology
Molar / pathology
Orthodontic Appliance Design
Palatal Expansion Technique
Patient Compliance
Retrospective Studies
Treatment Outcome

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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