Document Detail

Effectiveness of treatment for Class II malocclusion with the Herbst or twin-block appliances: a randomized, controlled trial.
MedLine Citation:
PMID:  12923506     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to evaluate the effectiveness of Herbst and Twin-block appliances for established Class II Division I malocclusion. The study was a multicenter, randomized clinical trial carried out in orthodontic departments in the United Kingdom. A total of 215 patients (aged 11-14 years) were randomized to receive treatment with either the Herbst or the Twin-block appliance. Treatment with the Herbst appliance resulted in a lower failure-to-complete rate for the functional appliance phase of treatment (12.9%) than did treatment with Twin-block (33.6%). There were no differences in treatment time between appliances, but significantly more appointments (3) were needed for repair of the Herbst appliance than for the Twin-block. There were no differences in skeletal and dental changes between the appliances; however, the final occlusal result and skeletal discrepancy were better for girls than for boys. Because of the high cooperation rates of patients using it, the Herbst appliance could be the appliance of choice for treating adolescents with Class II Division 1 malocclusion. The trade-off for use of the Herbst is more appointments for appliance repair.
Kevin O'Brien; Jean Wright; Frances Conboy; YeWeng Sanjie; Nicky Mandall; Stephen Chadwick; Ivan Connolly; Paul Cook; David Birnie; Mark Hammond; Nigel Harradine; David Lewis; Cathy McDade; Laura Mitchell; Alison Murray; Julian O'Neill; Mike Read; Stephen Robinson; Dai Roberts-Harry; Jonathan Sandler; Ian Shaw
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Multicenter Study; Randomized Controlled Trial    
Journal Detail:
Title:  American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics     Volume:  124     ISSN:  0889-5406     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-08-18     Completed Date:  2003-09-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  128-37     Citation Subset:  D; IM    
Unit of Orthodontics, University Dental Hospital of Manchester, United Kingdom. Kevin.O'
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MeSH Terms
Episode of Care
Malocclusion, Angle Class II / therapy*
Orthodontic Appliances, Functional*
Orthodontic Appliances, Removable
Orthodontics, Corrective / instrumentation*
Patient Compliance
Regression Analysis
Social Class
Spine / growth & development
Time Factors

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

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