Sagittal Skeletal Jaw Base and Dental Arch Relationships among Adult Orthodontic Patients: A CBCT Synthesized Cephalogram Analysis

The aim of this study was to assess the sagittal skeletal jaw base and dental arch relationships among adult orthodontic patients. 152 (male: 69 and female: 83; 21.4±3.48 years of age) patients’ dental study model casts and pretreatment 2D lateral cephalometric radiographs derived from CBCT 3D images were randomly selected. Paired t-test was performed to assess the difference between the examiners. Angle’s classification corresponded with skeletal classification by ANB angle measurement in 76.9% of the total sample (p<0.01) whereas Angle’s classification and skeletal classification by Wits appraisal measurement corresponded in 61.8% of the study sample (p<0.01). The skeletal classification by ANB angle measurement did correspond with skeletal classification by Wits appraisal measurement in 65.7% of the study sample and both Kappa and Chi-square test were significant with p<0.01. There was significant positive linear correlation between ANB angle and Wits (p<0.001) with the Coefficient, r=0.745. The predictability of Wits by ANB angle was determined by linear regression. The study concluded that there was statistical significance of relationships between sagittal skeletal jaw base and dental arch relationships among adult orthodontic patients.