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Comparative Study of the Bionator and Multi-P Appliances in the Treatment of ClassII Malocclusion: a Randomized Cephalometric Trial

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Author(s): Morteza Oshagh | Mahtab Memarpour | Hooman Zarif Najafi | Somayeh Heidari

Journal: Galen Medical Journal
ISSN 2228-5423

Volume: 2;
Issue: 1;
Start page: 1;
Date: 2012;
Original page

Keywords: Bionator | Multi-P | Class II Malocclusion | Cephalometric Trial

ABSTRACT
Background: Functional appliances such as Bionator have been used to treat Class II malocclusion. The purpose of this study was to compare the skeletal, dental and soft tissue effects of Bionator appliances with Multi-P (a newly developed appliance) in the treatment of Class II malocclusion. Methods and Materials: 45 Class II children were chosen and randomly assigned to either the Bionator or Multi-P treatment group. After excluding 13 patients from the study, 21 patients in Bionator and 11 patients in Multi-P group have participated in the study. Lateral cephalograms were analyzed at the beginning (To) and at the end of treatment (T1) to evaluate the changes in both groups. The paired t.test and Leven’s test were enrolled for statistical analysis. Results: Reduction of ANB angle was detected in both treatment groups. The Bionator group underwent insignificant greater mandibular advancement as measured by the SNB angle. (P= 0.73) The mandibular plane angle increased insignificantly in both groups. (P> 0.05) The inclination of upper incisors decreased significantly in Multi-P group. (P= 0.04) Conclusion: Both appliances are effective therapeutic means for Class II treatment associated with mandibular deficiency and may lead to normalization of the dentoskeletal parameters at the end of the treatment.
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