الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Buccolingual inclinations of molars are critical for establishing an optimal occlusion which is a fundamental objective of orthodontic treatment to obtain the correct position for all teeth in order to establish a stable and functional occlusion and improve aesthetic as well. Class II malocclusion is reported as usually seen skeletal disharmony in orthodontic population. Considering the significance of buccolingual inclinations of molars to compensation of skeletal discrepancies it was important to evaluate its role in skeletal Class II patients. The present study was carried out using Cone Beam Computed Tomography (CBCT) to evaluate the buccolingual inclination of maxillary molars relative to SN plane and occlusal plane and mandibular molars relative to mandibular plane and occlusal plane in skeletal Class II patients in both group’s Divison 1 and Divison 2 as well as upper and lower posterior dental height. This study was carried out on 40 CBCT scans divided into 20 CBCT of patients with Class II Div 1 and 20 CBCT of patients with Class II Div 2. The age was 20-25 years old. Buccolingual inclination of maxillary and mandibular molars were determined three dimensionaly and 3D images exported as DICOM format files before importing them into the MIMICS software. Comparison between angular measurements of the buccolingual inclination of maxillary and mandibular molars and linear measurements of upper and lower posterior dental height in Class II Div 1 and Class II Div 2 were performed using independent t-test with significant level set to be 0.05. The results showed that there was a statistically significant difference in the buccolingual inclination of maxillary first and second molars relative to SN plane and occlusal plane and no significant difference in the buccolingual inclination between mandibular molars except for second molars relative to mandibular plane between Class II Div 1 and Class II Div 2.