| Summary: | The scientific research is dedicated to studying of treatment problems of mesial malocclusion with the anterior mandible shift among preschool aged children (in the period of temporary dentition). The point of the study is to demonstrate the effect of treating mesial malocclusion associated with the mandible anterior shift and reverse overjet in a clinical case description. During the research of a clinical case long term results were analyzed. The method of treating mesial malocclusion associated with the mandible anterior shift and reverse overjet included usage of the original appliance. The appliance was also supposed to lead to harmonic development of a child’s oro-facial area. The analysis showed advantages of the suggested original orthodontic appliance. The malocclusion was corrected in a short time (3 months), that let us develop physiological jaws and teeth arches relationships and to resolve mandible side shifting before the central incisors erupted. During the eruption permanent incisors take their place and establish the proper overjet, that creates physiological conditions for harmonic oro-facial development. The result is stable over time. The appliance is easy to use and to adapt by children and has a good fixation in oral cavity. Thus, the suggested orthodontic appliance could be recommended for treatment of mesial malocclusion associated with the mandible anterior shifting among preschool aged children.
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