Oral health-related quality of life (OHRQOL): A 3-year cohort study.

Objectives: To assess changes in OHRQOL in patients undergoing functional and fixed appliance treatment for increased overjet (Class II division 1 malocclusion). Methods: Seventy patients aged 11-14 with Class II division 1 malocclusion were recruited. Patients were treated with a Twin Block appliance followed by upper and lower fixed appliance therapy. The Child Perception Questionnaire (CPQ11-14) was administered at four time points: T1 (prior to starting treatment), T2 (At the end of the functional appliance phase, T3 (Six months with upper and lower fixed appliance) andT4 (At the end of treatment). Results: Forty-six participants completed the study. At the end of the functional phase, a statistically significant improvement was observed in the emotional well-being subscale of the CPQ. At the completion of treatment, the emotional and the social well-being subscales have improved significantly. And while the oral symptoms and functional limitations subscales scores increased during the fixed appliance phase and then subsequently improved; these changes were not of statistical significance. Conclusions: A positive correlation was found between orthodontic treatment and significant improvements of the emotional and social well-being in Class 2 Division 1 patients.