Lower Third Molar Following Functional Appliance in Skeletal CL II

Objective: The purpose of this study was to investigate the effect of functional treatment as a case group on A- p position of unerupted third molar incontrast to treating control group by headgear. A functional appliance(designed by Farmand, a pioneer of orthodontics in Iran) is a loose-fitting intra-oral appliance that postures the mandible forward,thereby producing skeletal and dentoalveolar changes. Methods: An experimental study was designed in that two groups of growing male patients; 20 case functional and 20 case headgear who were matched inoccording to the dental age, ANB difference selected participated, one as experimental group and the second as control group Data were obtained from direct measurements of existing longitudinal panoramic radiographs taken during the course of study investigating Class II malocclusion treatment options. The mandibular third molar anterior–posterior (A–P) position in relation to the anterior border of the ramus in two groups investigated as a in start &end of treatment. Results: Disclosed that after 18 months from functional&headgear therapy A–P position of molar was significantly correlated to case group ( P<0.001). Conclusions: Third molars adopt a position further anterior in relation to the ramus with functional treatment than they do in controls. As dental age increases, functional appliance use appears to positively influence lower third molar position.