engleski

Dentoalveolar Changes Predominate During the Orthodontic Therapy of Skeletal Orthodontic Anomalies

The purpose of this study was to evaluate skeletal and dentoalveolar changes following administration of fixed and/or bionator treatment in patients with Class II relatinship, Class III relationship and open bite. The sample consisted of 50 subjects with the mean age of 12 years and 8 month. Two latero-lateral cephalometric radiographs were taken for each patient, one before and one after the administration of orthodontic treatment. The control group consisted of 50 cephalometric radiuographs of eugnatic subjects. Conventional cephalometric procedure was applied in the analysis of seventeen cephalometric variables. After the treatment, minor skeletal changes were observed. More anterior mandibular position in Class II subjects was found, with anterior rotation of maxilla following the adninistration of bionator treatment and posterior maxillary rotation following the administration of fixed appliance treatment. Slight mandible retraction was found in patients with Class III malocclusion, while minor convergence of the basal parts of both jaws was found in patients with open bite following the treatment. More evident dentoalveolar changes were observed in both Class II and Class III maloclusions. Retrusion of upper and protrusion of lower incisors were dominant in patients with Class III maloclusions. Major effect on incisors position in comparison to minor incisor tipping (inclination) was evaluated after the fixed therapy. Protrusion of upper and retrusion of lower incisors was achived in patients with Class III relationship. In the patients with open bite, slight extrusion of the upper and lower frontal teeth was observed following treatment administration. Finally, the results of this study suggest that, following the administration of either fixed or bionator treatment, more dentoalveolar than skeletal changes should be expected.

dentoalveolar changes; orthodontic therapy

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