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Morphological caracteristics of malocclusion class II
Abstract
Class II malocclusion are complex anomalies of the skeletal and dental systems. The aim of this study is that the rengenkefalometrics analysis closer determine the morphological characteristics of this malocclusion. For this study were used 30 patients aged 18-30, previously clinically diagnosed class II, before the planned orthodontic treatment. The results analisis lateral cephalometric radiographs were compared with the 30 patients with class I malocclusion. Analyzed three linear and two angular cranial base dimensions and nine angular and four linear measures from the facial skeleton. The Results show: No statistically significant differensis in cranial base angle (SNBa) and anterior cranial base length (S–N) between class II and control Class I. Angle maxillar prognathism ( SNA) is no signifikant different between class I and Class II but SNB angle were signifikant smaller. The length of maxillary base (A`-SnP) is longer and the length of mandibule (Pg`-MT1/MT) is signifficantly smaller. The gonial angle (ArGo–Me) was smaller with open articular angle (GoArSN). Morphological characteristics of class II malocclusion are , retrognathic and smaller mandibular ligth, normognathic and longer maxilla, open articular angle with vertical tendency of the craniofacial growth pattern.
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