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ABSTRACT The purpose of this study was to evaluate the cephalometric skeletal and dental characteristics related with class II division 1 and class II division 2 malocclusions in the sagittal and vertical dimensions. Lateral cephlaograms of 100 patients for both genders were used to determine the characteristics of class II div 1 and class II div 2 malocclusion. The data base was developed in SPSS 11 for windows. In sagittal plane, mandible was more retrognathic in class II/1 than class II/2 malocclusion. Vertically, all the measurements were significantly reduced for class II div 2 malocclu-sion, indicative of a skeletal deep bite. Upper incisors were proclined in class II/1 and retroclined in class II/2 patients. Lower incisors were proclined in class II/1 while normally inclined in patients of class II/2 malocclusion. Class II/1 malocclusion is associated with more retrognathic mandible, proclined upper and lower incisors.
Class II/2 malocclusion is associated with a lower anterior facial height and retroclined upper incisors.
Key words: Class II malocclusion, Class II division 1 malocclusion, Class II division 2 malocclusion INTRODUCTION Numerous parameters concerning skeletal, dental and soft tissues components are evaluated from the cephalometric radiographs for the diagnosis and treat-ment planning in orthodontics. These are utilized to relate craniofacial landmarks to the profile and occlu-sion in a meaningful way.1,2 Among these commonly used are Stieners3 and McNamara4.
Class II malocclusion is a common type of maloc-clusion that may present a variety of skeletal and dental configurations.5,6 Maxillary protrusion and man-dibular retrusion is a frequent dentofacial anomaly in various populations.7 Skeletal class II patterns arise from not only sagittal, but also from vertical discrepan-cies.8 Dental class II malocclusion presents with distal relationship of lower teeth to upper and further has two divisions; Class II division 1, and class II division 2.9 However the investigations in class II/1 and div 2 malocclusion subjects have not yielded consistent re-sults. Some studies revealed that class II/1 malocclu-sion is associated with prognathic maxilla and mandible was found out to be retrognathic and in dental parameters, bimaxillary proclination is demon-strated.10,11,12 Other studies demonstrated that the max-illa was in a normal position while the mandible was retrusive.13,14 In Class II/2 malocclusion, most of the studies stated a normally positioned maxilla in sagittal plane and retroclined upper...