26 February, 2015, Iraq, USA NEWS CORPZ.T. Al Ahmar receives World Dentistry Research Award- 2015. The research findings were published on world's prestigious most read journal: The Journal for Dentistry. Aim: This study was to designed to compare differences in transverse dimensions of dental arches, alveolar widths and skeletal factors of Class II division 1, Class II division 2 malocclusion. Methods: Dentoskeletal characteristics of class II malocclusion subjects were evaluated using cephalometric radiograph and dental cast of 70 untreated patients. Sample included 37 class II Division 1 and 33 class II Division 2 malocclusion patients. Inter canine, inter premolar, inter molar, inter canine alveolar, inter premolar alveolar ,inter molar alveolar widths are measured on study models. Radiographs digitized using Auto CAD program all the data compared by independent t- test. Results: Showed statistically significant difference between groups for maxillary inter premolar, inter molar, alveolar inter premolar, mandibular inter canine and inter canine alveolar. Results revealed SNB angle was responsible for skeletal sagittal difference between groups. Class II division 1 showed a retrognathic mandible. Conclusion: maxillary inter premolar, inter molar and alveolar interpremolar widths were significantly narrower in the Class II division 1. Rapid maxillary expansion rather than slow expansion may be considered. There was a significant reduction of mandibular intercanine width in division 2 subjects. Cass II division 1 subject show more retrognathic mandible than class II division 2 subjects. The data suggest that knowledge of the craniofacial growth process particularly skeletal and dentoalveolar growth pattern in Class II malocclusion patients orthodontic and orthopedic therapies may be a clinical usefulness procedure leading to proper choice of treatment time, modality to improve and to shorten the period of treatment, avoiding adverse consequences. The limitation of the study lies in the fact that the database collected from the cephalometric x-ray of untreated patients with class II malocclusion which is a two dimensional view instead of using a digital computerized tomography scan(3D ) view so that the dimensions can be measured in a 3 axis of lines. The research was conducted by the Author at the University of Babylon, Iraq. The author has given their contribution to this paper in relation to her competing interests.
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