[Results of treatment of a distal deep bite according to the cephalometric analysis].
Aim of the research is analyze of changes of facial cranium bones morphometric parameters as a result of distal overbite orthodontic care. On the basis of examination of 214 head telerentgenogramms in lateral projections which where received before and after orthodontic care, facial cranium bones sizes where defined, that changed as overbite orthodontic treatment result with the account of main direction of bones' development. Analyzing angular linear sizes and their correlation in case of distal overbite, there were observed teeth position disorder, alveolar arches, jaw-bones and their characteristic sizes. Among patients with mixed overbite in the period of jaw-bones active grow the treatment was based on 2 phases - 1) earl orthodontic therapy with the use of "2*4" system with labial bumper in space of lower bone, 2) final phase was held with the help of straight wire technique. In the period of second teeth simultaneously with straight wire technique we used occlusive brackets fixed on upper incisor teeth palatal surface: among 28 patients we have fixed lingual brackets of "Ormco" production on upper incisors, among 79 patients we have stuck composite occlusive plates, intermandibular draft was used, which sponsored upper lower jaw-bones lateral teeth alveolar prolongation. While comparing results with deep distal overbite before and after orthodontic care, we were able to find out statistically guaranteed differences in following sizes; incisor overbite depth and sagittal fissure size, which corresponded to the norm after care. In the process of care advantageous alveolar compensation was fixed; facial esthetic and jaw-bones position was changing for the better. In case of horizontal and neutral types of jaw-bones growth the correction of incisor overbite depth happens on the account of alveolar height reduction in space of upper and lower jaw-bones incisors and that parameter increase in space of both jaw-bones lateral teeth. In case of vertical type of jaw growth alveolar shortening in space of upper jaw-bone was observed and in a less degree- of upper and lower jaw lateral teeth, and, also, of lower jaw incisors. Before and after orthodontic treatment the previous type of growth remained the same.
Papazyan
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M. Geratsi Erevan State Medical University.
D000293:Adolescent; D001732:Bite Force; D002508:Cephalometry / Q000379:methods*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009057:Stomatognathic Diseases / Q000175:diagnosis*