الفهرس 
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Abstract
In order to achieve a sound anteroposterior orthodontic tooth movement of upper and lower incisors in patients with different vertical facial patterns, knowledge of the sagittal width and height of the upper and lower anterior and posterior alveolus is essential, thus knowledge of the morphological features of the alveolar bone is of paramount importance to orthodontic tooth movement. Cephalometric radiographes were used in the current study to evaluate dento-alveolar dimensions in relation to vertical facial patterns in a sample of adults in the tooth-bearing region of the jaws, in the anterior as well as the posterior region. The sample consisted of 150 lateral cephalometric radiographs, selected from 650 films, with good quality and clarity with age range from 18-25 and average 20.03±2.21 years old. The relevant landmarks were identified and the various parameters of dentoalveolar height were drawn. The sample was divided into three groups of vertical facial pattern; high angle, low angle and average angle based on the mandibular plane angle (SN-MP). All data and measurements, obtained from this study, were collected, tabulated and statistically analyzed using the Statistical Package for Social Sciences (SPSS) software version 24, to find the differences between the vertical groups descriptive statistics were calculated for all variables between males and females by indepented sample t-test at the confidence level of p<0.05. Numerical variables are Chapter VII Summary and Conclusion 54 expressed by descriptive statistics as mean, standard deviations, standard error and range. One-way ANOVA and post hock test (Tukey-test) is used to compare quantitative data between the three vertical group in whole subjects. A statistical significant difference in dentoalveolar heights related to anterior region as high angle cases had increased dentoalveolar heights and low angle cases had decreased dentoalveolar heights of maxillary and mandibular alveolar walls, also a statistical significant difference in dentoalveolar widths related to anterior region as low angle cases had increased dentoalveolar widths and high angle cases had decreased dentoalveolar widths of maxillary and mandibular alveolar walls. On the other hand, no statistical significant difference has been found in lower posterior dento-alveolar height among the three vertical facial types in maxillary and mandibular alveolar walls.