Thesis Type: Doctorate
Institution Of The Thesis: Gazi Üniversitesi, Sağlık Bilimleri Enstitüsü, Turkey
Approval Date: 2017
Student: HANDE ODABAŞI
Supervisor: HACER NİLÜFER DARENDELİLERAbstract:
The aim of our study is to examine the facial modules determined according to Enlow's counterpart analysis in the high angle and low angle skeletal class III individuals and compare these individuals to the skeletal class I control group individually. In our study, lateral cephalometric films of 270 high angle and low angle class III and optimum class I patients in Gazi University Faculty of Dentistry Department of Orthodontics were evaluated. High angle and low angle class III and optimum class I individuals were evaluated in terms of growth period and gender factors by Kruskall Wallis-H test and Post-Hoc multiple comparison. In our study, SO horizontal length of posterior craniofacial column was found to be statistically significantly short in the high angle group in both sexes. Ar-SE angle was statistically significantly small in the high angle group than in the other groups, especially in females. There was no statistically significant difference between the groups in PM vertical and SO-Ra vertical lengths of the posterior craniofacial column. SD vertical and AM vertical lengths of the anterior craniofacial column were found to be statistically significantly in the low angle group in females. While the width of the ramus was found to be statistically significantly short in the high angle group in males, there was no statistically significant difference between the groups in Ar-Go length. UM horizontal length was found to be statistically significantly short in the high angle group in females. Maxillary skeletal length was found to be statistically significantly short in both sexes in the high angle group. There was no statistically significant difference in mandibular skeletal length in the high angle and low angle females and males compared to control group. In all three groups, it was observed that SO horizontal length-ramus width and UM horizontal-maxilla skeletal lengths obeyed the principles of Enlow's counterparts. It has been observed in the high angle class III subjects that horizontal reduction of posterior craniofacial column sizes affected the related counterpart structures and this result complies with the developmental mechanism of class III anomalies determined by Enlow. Enlow's counterpart analysis showed that high angle and low angle class III anomalies are completely different from each other.