ABSTRACT
The aim of this study was to delefmile change in the position of hyoid bone with functional appliance treatment. The present study was carried out using pre-functional and post-functional cephalographs of patients attending the Orthodontic Clinics at the Aga Khan University Hospital, Karachi, from 2003 to 2007. This study was conducted on 30 Pakistani subjects [12 males and 18 females] aged between 9 to 14 years, treated with removable or fixed functional appliances. Cephalometric points, linear and angular measurements assessing position of hyoid bone on pre-and-post functional cephalographs were recorded. Paired sample t-test was used to depict the change in the position of hyoid bone following functional appliance treatment. Linear and angular cephalometric measurements depicting the position of hyoid bone after functional appliance treatment were statistically insignificant. There was no statistically significant change observed in the position of hyoid bone with functional appliance treatment