A STUDY ON THE PHARYNGEAL SIZE IN DIFFERENT SKELETAL PATTERNS

In the present study, pharyngeal size was investigated on the lateral cephalometric head films of 90 subjects, 45 males and 45 females, havi ng different ANB angles. All of the subjects were aged 13 to 15 years. The films were taken at natural head position, and all were divided i nto three groups according to the ANB angle: ANB angles smaller than 1 degrees, between 1 degrees and 5 degrees, and larger than 5 degrees. In addition, each group was also divided into two subgroups according to sex. The effects of the ANB angle and sex on the pharyngeal size we re investigated by means of variance analysis. It has been observed th at two measurements, hy-apw4 and oropharynx area measurements, were af fected by the change of ANB angle, and two other measurements, t-ppw a nd hy-apw2 measurements, by the sex; and that hy-apw4 measurement and oropharynx area became smaller with the increase of ANB angle.