Document Detail

Hawley retainers full- or part-time? A randomized clinical trial.
MedLine Citation:
PMID:  19797411     Owner:  NLM     Status:  MEDLINE    
The aim of this trial was to compare two different orthodontic retention regimens: is night-only wear of upper and lower Hawley retainers for 1 year as effective as 6 months full-time followed by 6 months night-only wear? Sixty-seven consecutive patients attending for orthodontic debond were randomly allocated to wear upper and lower Hawley retainers either for 1 year night-only (group 1) or for 6 months full-time followed by 6 months night-only (group 2). In group 1, 41.2 per cent were males and 58.8 per cent were females and their mean age was 15.6 years [standard deviation (SD) 1.6 years]. In group 2, 24.2 per cent were males and 75.8 per cent were females and their mean age was 15.8 years (SD 1.2 years). Study models were taken at the start (T0) and end (T1) of treatment and 1 year post-debond (T2). Digital callipers were used to measure upper and lower labial segment irregularity using Little's index and upper and lower labial segment crowding. To evaluate differences between groups 1 and 2 t-tests were used. There were no statistically significant differences between the two retention regimens at T2 for labial segment irregularity or crowding (P > 0.05). Since both retention regimens were equally effective during the 1 year retention period, it would seem clinically acceptable to ask patients to wear their retainers at night only.
M Shawesh; B Bhatti; T Usmani; N Mandall
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2009-10-01
Journal Detail:
Title:  European journal of orthodontics     Volume:  32     ISSN:  1460-2210     ISO Abbreviation:  Eur J Orthod     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-03-25     Completed Date:  2010-06-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7909010     Medline TA:  Eur J Orthod     Country:  England    
Other Details:
Languages:  eng     Pagination:  165-70     Citation Subset:  D; IM    
School of Dentistry, University of Manchester, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Dental Models
Episode of Care
Malocclusion / therapy
Night Care
Orthodontic Retainers* / utilization
Orthodontics, Corrective / methods
Prospective Studies
Recurrence / prevention & control
Sample Size

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

Previous Document:  Maxillary expansion in the mixed dentition: rapid or semi-rapid?
Next Document:  In vitro evaluation of the frictional forces between brackets and archwire with three passive self-l...