Cephalometric characteristics assessment of Pattern I

Sílvia Augusta Braga REIS, Leopoldino CAPELOZZA FILHO, Maurício de Almeida CARDOSO, Marco Antônio SCANAVINI

The aim of this study was to determine cephalometric characteristics of Pattern I patients, to establish averages, and mainly, standard deviation references to be used comparatively with values of skeletally compromised cases. The sample was comprised by 30 white brazilian adults selected by morphologic facial analysis in lateral photographs. In the study of facial growth pattern, the palatine plane angle was 9,4°± 3,2°, while goniac angle was 121,4°± 5,3°, both with sexual dimorphism. For the mandibular plane angle, the value was 29,2°± 4,2°, without sexual dimorphism. The average values for total, lower, medium and posterior facial height were, respectively, 123,0mm± 8,3mm, 68,8mm± 6,6mm, 55,9mm± 3,5mm e 62,6mm± 4,7mm. For all those measures, feminine values were smaller then masculine ones. Cephalometric position of maxillary and mandibular bones confirmed the skeletal balance of the sample. SNA was 82,2° ± 2,9°, SNB was 79,8° ± 2,5° and ANB was 2,4° ± 1,4°, without sexual dimorphism. Maxillary length was 95,2mm ± 5,7mm, while mandibular length was 124,2mm ± 8,2mm, with sexual dimorphism. Upper and lower incisors were more protruded them those of literature samples. Upper incisors were studied by 1.PP angle, and the average was 115,2° ± 5,5°, while the value for IMPA was 93,9° ± 5,7°.

Keywords: Cephalometry. Malocclusion. Facial analysis.

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