الفهرس 
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Abstract
Aim of study: the purpose of this study was to determine dental andskeletal effects of the of Teuscher activator in treatment of ClassII Division 1 malocclusion cases. Material and method: sixteen patients (eight males and eight females) with Class Division 1 malocclusion were selected for this study. The mean age of the patients was 10 years 5 months. All patients were treated with the Teuscher activator for one year. Cephalometric radiographs and plaster study models were made at two stages; before and after treatment by the Teuscher activator. The cephalometric radiographs and the study models were analyzed and the collected data were subjected to statistical analysis. Statistical t-paired test was done to determine the significant difference between the pretreatment and posttreatment measurements. Results: The SNA angle was significantly decreased (P = .002). The SNB angle was significantly increased (P = 000). The ANB angle was significantly decreased (P = 000). The mandibular plane, palatal plane, and Y-axis angles (SN-MP, SN-PP. and Y-axis respectively) were not significantly affected (P = .204, P =.705, P = .041 and P = .o64). Teuscher functional appliance could be used successfully in treatment of Class II Division 1 malocclusion cases.