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Quintessence Publishing: Journals: ORTHODONTICS
The Art and Practice of Dentofacial Enhancement

Formerly World Journal of Orthodontics

Edited by
Rafi Romano, DMD, MSc (Editor-in-Chief)

ISSN 2160-2999 (print) / ISSN 2160-3006 (online)

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Winter 2007
Volume 8 , Issue 4

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Medium Opening Activator: Design Applications for the Management of Class II Deep Overbite Malocclusion

Farhad B. Naini, BDS, FDSRCS, MSc, MOrthoRCS, FDSOrthRCS/Daljit S. Gill, BSc, BDS, FDSRCS, MSc, MOrthoRCS, FDSOrthRCS/Ed Payne/Bill Keel

Page: 411
PMID: 19641758

Early identification of Class II deep bite malocclusion is essential for a successful treatment outcome. Timely treatment with functional appliances is among the most effective treatment approaches available for the management of Class II malocclusion in growing subjects. The Medium Opening Activator belongs to a family of functional appliances known as activators. The aims of this article are to review the clinical management of the Medium Opening Activator and to describe a number of appliance modifications, including: (1) a method of stepwise advancement of the mandible using the same appliance; (2) modifications allowing transverse expansion of the maxillary posterior segments, and anterior movement of the maxillary labial segment in 1 appliance, negating the need for a prefunctional phase of treatment; and (3) placing mandibular fixed appliances early. A case report is described to demonstrate the benefits of the Medium Opening Activator. World J Orthodontics 2007;8:411.e19.

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