Abstract
Basic descriptive cephalometric data are presented for 30 individuals with untreated Class II Division 1 malocclusions, 15 males and 15 females. Two radiographs of each subject were examined, the mean age for the first being 12 years one month, and for the second 17 years five months, thus spanning the period during which orthodontic treatment is usually carried out. Mean values for 38 bony and dentoalveolar parameters were calculated, and the male and female groups were compared. There was a tendency on average to a mild skeletal II pattern, with mild mandibular retrognathism. The mean increase in many of the linear measurements in the males was up to three times that seen in the females, and the females had a more downwards and backwards pattern of mandibular growth rotation than the males.
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