[Roentgen cephalometric analysis of linear variables in a sample with normal occlusion]

Eight linear variables have been analysed in a sample of 200 persons with normal occlusion. Selected variables define the cranial base, basal planes of both jaws, anterior face height, upper and lower segment of the anterior face height, posterior face height and mandibular height. Particular aim of this investigation was to establish the differences according to age and sex, to describe the correlations as well as to define the proportional relations among the selected linear variables. From the results obtained the following conclusions were drawn: All variables increased by growing up; the greatest increase was found in posterior face height, and the smallest in cranial base length, The highest correlation was found between variables defining both facial heights. Index defining proportion between posterior and anterior face height (65.4) showed a horizontal growth tendency in the population investigated.