Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Orthodontics

This study was carried to establish three-dimensional soft tissue normative data for Egyptian adults with balanced faces and near to normal occlusion, and studying the sex difference as well. A cross sectional observational study was performed on 37 Egyptian adult subjects (18-25 y) having balanced facial proportions and Angle`s class I molar & canine relationship. The sample was collected from Cairo University undergraduate{u2019}s and post graduate students from Faculty of Dentistry and Faculty of Medicine. The data were obtained using i-CAT CBCT machine, a sample of 37 CBCT images were collected. The subject`s head was oriented before imaging in the natural head position. Three-dimensional assessment was performed by Anatomage 5.3 software. Landmarks and measurements was constructed on the software for performing the analysis. In addition, the landmarks were added to the images to execute the analysis. Inter- and intra-observer reliability was confirmed after 3D landmarks identification of the whole sample as it was conducted by the 1st observer (the researcher), which was done twice with a week gap between both attempts and once by the 2nd observer (M.H). The collected data from CBCT images were statistically analyzed to obtain the followings; Means, standard deviations, sex difference for all the linear, angular measurements and ratios. Moreover, new suggested analysis was done by the researchers. Transverse correlation analysis was measured also in this study for Egyptian adults

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