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British Journal of Orthodontics, Vol 19, 117-125, Copyright © 1992 by British Orthodontic Society
ARTICLES |
SL Gibbs and NP Hunt
Mayday University Hospital, London.
A retrospective study was undertaken using treated functional appliance cases. The groups involved 27 Andresen, 19 Bionator, and 23 Frankel cases. The reflex metrograph was used to measure arch width from study models at the start of treatment, end of treatment including retention, and at least 1 year post-treatment. The effects of each appliance on arch width are compared during and after treatment.
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