: To assess the position and inclination of upper and lower incisors and bases in different groups of skeletal malocclusions.  45 pretreatment lateral cephalometric radiographs were included. They were divided into his three groups of skeletal class I, class II, and class III. A variety of linear and angular measurements were used to assess both the position and inclination of the maxillary and mandibular bases, incisors, and the relationship between the incisors. There was a significantly stronger correlation between anterior-posterior skeletal mismatch and maxillary alveolar bone compensation in skeletal classes I, II, and III. Except for maxillary vertical skeletal discrepancy (MP-SN) and alveolar compensation, there was a weak correlation between maxillary and mandibular vertical skeletal discrepancy and alveolar compensation. The anterior-posterior position of the skeletal jaw had a greater effect on alveolar bone changes than the vertical inclination of the skeletal jaw in the Grad variant. There may be a relationship between alveolar bone changes and skeletal anteroposterior and vertical position, inclination and intermaxillary relationship.