Class II, Division 1 Malocclusion treated with the Andresen Appliance followed by Fixed Orthodontics
Orlando Motohiro Tanaka, Oscar M Antelo, Thiago M Meira, Adriana Iturralde, Lara K Guimarães
Andresen activator, Class II division 1, Functional appliance, Interception
Citation Information :
Tanaka OM, Antelo OM, Meira TM, Iturralde A, Guimarães LK. Class II, Division 1 Malocclusion treated with the Andresen Appliance followed by Fixed Orthodontics. World J Dent 2018; 9 (3):242-248.
Introduction: Mandibular retrognathism is the most common feature in class II malocclusions. Functional appliance therapy focuses on reducing the increased overjet and overbite, establishing better conditions for mandible growth response in phase I. Phase II corrects the position of the teeth and gives an adequate stable occlusal relationship.
Aim: (1) To describe a class II, division 1 malocclusion treated with the Andresen activator in a growing patient followed by comprehensive orthodontic fixed appliances, and (2) to take advantage of both approaches performed immediately one after the other in adolescence to obtain better and stable results without tiring the patient and parents, prolonging the treatment time.
Case report: A 13-year-old female patient presented with a class II, division 1 malocclusion with increased overjet and deep overbite, due to mandibular retrognathism. She wore the Andresen activator approximately 12 to 14 hours per day during afternoons and nights for 9 months, followed immediately by comprehensive fixed appliances for an extra period of 1 year.
Conclusion: Clinical results showed that class II, division 1 malocclusion was corrected, overjet and deep overbite were reduced to normal parameters, and convex profile was improved to a straight one.
Clinical significance: These two phases performed one after the other in the early permanent dentition were beneficial for the patient, and due to good results obtained in phase I, phase II with fixed appliances was simplified, focusing on small details of dental movements. The total time of treatment was 21 months.
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