Thesis & Dissertations

Background: The aim of this study was to describe and categorize the morphological features of Lebanese Class II, division 1 malocclusion patients both horizontally and vertically. Methods: A total of (145) lateral cephalometric radiographs comprising: (58) males and (87) females diagnosed with Class II, division 1 malocclusion, in an age range of sixteen to twenty six years were selected. Four horizontal (maxillary prognathism, mandibular retrognathism, combination of both, and dento-alveolar) and three vertical (short face height, normal face height, and long face height) categories were used. Specific vertical and horizontal angular and linear measurements were used to categorize the patients. The number of patients in each group was calculated and percentage of each was tabulated. Results: Patients with mandibular retrusion formed the most prevalent group when patients were assessed horizontally (35.17%).Vertical typification showed that long face height formed the highest percentage (51.03%). When combining both horizontal and vertical features the most common pattern was mandibular retrusion with long face (23.44%), while maxillary prognathism with short face height was the least frequently seen type (2.75%). Conclusions: Class II, division 1 Lebanese patients mainly elicit mandibular retrusion with long face which warrants the emphasis on functional and orthopedic early treatment. Keywords: Cephalometric- Class II, division 1 malocclusion- Class II malocclusion- Morphological features.