Abstract
Using fixed appliances 2x4 in early treatment of malocclusion at mixed dentition stage will adjust the relative correlation of occlusion; which has been studied internationally. However, in Vietnam, there are few publised studies about the effective function of this appliance in treatment. We have conducted the study about the effects of using this appliances in malocclusion early treatment for 36 mixed dentition stage patients. Objective: The study aimed for evaluating the results of malocculsion early treatment using 2x4 fixed appliances. Methods: Prosspective study. Results have shown the 2x4 fixed applianes in early treatment would adjust the relative correlation of occlusion both vertically and horizontally, in which the front teeth aligned neatly, retroclined and a deep overbite conditions improved significantly and maxillary crowded anterior teeth condition was also corrected. The indexes on Cephalometric before and after treatment desmontrated well correlation in anterior-posterior plane.
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