Comparison of cephalometric characteristics of class II division ۱ patients between Shiraz and Hamadan

Background and aim: Accurate identification of dental and skeletal characteristics of different kinds of malocclusions is necessary for educational purposes, proper treatment planning and to reach successful results. The aim of this study was to assess skeletal and dental differences of class II division I patients in Shiraz and Hamadan Dental Schools. Method: In this retrospective study lateral cephalograms of ۹۸ patients from Hamadan (۵۳ girls and ۴۵ boys) and ۹۶ Patients from Shiraz (۴۸ girls and ۴۸ boys) with class II division I malocclusion and age range of ۹-۱۴ years old were evaluated. Cephalograms with ANB angle higher than ۵ degree were traced with Dolphin program. Statistical analysis was performed using SPSS software. Student t- test was used for between group comparisons. Chi- Square tests used for dichotomous variables.Results: Comparison of mean values of variables between the two groups showed significant differences between SNB, MP-SN, U۱-NA۰,Y-Axis, Inter incisal angle and PFH/AFH. High percent of patients in both groups had mandibular retrusion, vertical facial growth pattern, protrusion of upper and lower anterior teeth. These characteristics were not statistically significant between boys and girls.Conclusion: This study revealed that there was more mandibular retrusion, vertical facial growth and maxillary protruded incisors in class II division I patients of Hamadan in comparison to Shiraz.