Influência das características cefalométricas e clínicas no sucesso do tratamento ortopédico da má oclusão de classe III

Abstract

The objective of this study was to identify cephalometric variables able to predict which patients will show a better response to orthopedic treatment for skeletal malocclusion class III. The sample consisted of 23 patients with Class III malocclusion with maxillary retrusion in the skeletal component of this malocclusion. Were divided into two groups, group success with 12 patients (initial mean age = 10.87 SD = 1.76) and failure group with 11 patients (initial mean age = 11.61 SD = 2.12). Lateral radiographs were taken at the beginning and final of the orthopedic treatment, radiographs were digitized the points marked and the measurements cephalometric were processed. Statistical tests were performed for intragroup and intergroup comparison at initial (T1), final (T2), and changes (T2-T1). The results showed that the variables related to lower incisor inclination and mandibular growth directly influence the success of therapy. It is concluded that the compensatory lingual inclination of the incisors in the initial of orthopedic treatment features a cephalometric variable that can predict failure of the orthopedic therapy, in the same way the mandibular growth markedly