Evaluation of the dimensions of upper airway spaces in individuals with different skeletal classes and vertical growth patterns in ahvaz dental school in 1397 

Upper air spaces are among the most important elements involved in breathing. There is a close correlation between the size of airway space and the morphology of the face. The aim of this study was to evaluate the depth of upper airway by radiographies of cephalometrics in individuals with skeletal classes and vertical growth patterns. Subjects and This is a retrospective study using digital lateral cephalometric images in the Archives of Radiology Department of Ahvaz Dental School. 105 radiographic samples were examined in sagittal and vertical dimensions, and nasopharyngeal, oropharyngeal and hypopharyngeal depths were measured in each dimension. Data were analyzed by SPSS software version 22 and the results were determined by Tukey HSD and variance tests. In Sagittal dimension, there is a significant statistical difference in depth of the nasopharyngeal between skeletal classes I and III and also in the depth of the oropharyngeal between classes II and III. Compared with classes I and II and classes II and III, mean hypopharynx depth is significantly different.(P<0.05) No significant statistical difference was found among the different individuals in the vertical dimension.(P>0.05) According to the results, skeletal deep bite, nasopharyngeal depth and skeletal open bite increase the depth of the oropharyngeal and hypopharynx. In sagittal dimension, in class I, nasopharyngeal depth and in grade III increases the depth of oropharyngeal and hypopharyngeal. In the vertical dimension, people with skeletal deep bite, nasopharyngeal depth and skeletal open bite individualy increase the depth of oropharyngeal and hypopharyngeal.