الفهرس 
Growth and development of the pharynxOnly 14 pages are availabe for public view
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Abstract
Normal nasal respiration is dependent on sufficient anatomical dimensions of the airway. In addition, the size of the nasopharynx is of particular importance in determining whether the mode of breathing is nasal or oral. Patients with OSA demonstrate decreased upper airway dimension and craniofacial skeletal abnormalities The purpose of this study was to investigate the relationship between the upper airway dimensions of Egyptian nonsnoring children and sagittal and vertical skeletal malocclusions. Therefore it was important to investigate this relationship in order to be an early predictor for diagnosis of impaired respiratory function and to aid them by orthodontic treatment. One hundred and eight subjects were selected. Their age ranged between 9-13 years old. For each subject a lateral cephalometric radiograph was done and traced. The subjects were divided into normodivergent and normal sagittal facial pattern groups. Normodivergent group had a normal vertical skeletal relationship (SN-MP angle between 27-37˚) with a total number of 70 subjects and subdivided into Class I, Class II and Class III. Normal sagittal group had a normal anteroposterior skeletal relationship( ANB angle between 2-4 ˚) with a total number of 70 subjects and subdivided into normal, low and high angles. All data had been collected, tabulated and statistically analyzed.