Sanaz Soheilifar - Orthodontic Department, Hamadan University of Medical Sciences, Hamadan, IR Iran
Mohammad Ali Momeni - Orthodontic Department, Hamadan University of Medical Sciences, Hamadan, IR Iran

Background According to the close proximity of hyoid bone with dentofacial structures and its muscular attachments, a probable relationship between it and different types of skeletal patterns is suspected. Objectives The aim of this study is compare the position of hyoid bone in skeletal class I and class II patients. Methods In this study ۵۰ cephalograms were divided into two groups, skeletal class I (۱ ≤ ANB ≤ ۴) and skeletal class II (ANB > ۴), with ۲۴ and ۲۶ patients in each group, respectively. Horizontal and vertical position of hyoid bone were evaluated. SPSS software and student t-test were used to analyze the data. Results According to the results of our study, there is no statistically significant difference between the hyoid bone position in skeletal class I and skeletal class II patients. Conclusions Since the hyoid bone position is similar in skeletal class I and class II patients, the skeletal pattern is not the only determinant of the position of hyoid bone.

Cephalometry, Hyoid Bone, Angle Class II Malocclusion, Angle Class I Malocclusion