The nasopharynx, face height, and overbite.
In lateral cephalometric films of a group of male subjects, none of whom was a mouth breather, the statistical relationships between overbite and nasopharyngeal dimensions were weak. Moderate relationships were found between face height and nasopharyngeal dimensions. Strongest correlations, with a peak at 10 years, were between--Face height and nasopharyngeal height (+) Face height and nasopharyngeal area (+) Face height and roof angle (-) Dynamic correlations between overbite, face height and nasopharyngeal dimensions were weak. Class II malocclusion subjects on average showed--Smaller Nasopharyngeal and Adenoid Areas. Larger Airways in both real and proportional terms, compared with Class I and normal occlusion subjects.
D000293:Adolescent; D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D005145:Face / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000175:diagnosis* / Q000473:pathology; D008311:Malocclusion, Angle Class I / Q000175:diagnosis / Q000473:pathology; D008312:Malocclusion, Angle Class II / Q000175:diagnosis / Q000473:pathology; D009305:Nasopharynx / Q000033:anatomy & histology*; D014716:Vertical Dimension