A follow-up study investigating changes in oral health-related quality of life (OHRQoL) in patients undergoing orthodontic treatment for Class II division 1 malocclusion: A longitudinal study

The aim of the study is to evaluate the impact of orthodontic treatment on OHRQoL in children with Class II division 1 malocclusion. Secondary objectives included assessment of the level of agreement in rating the children\u27s OHRQoL between parents and children, examination of the relationship between the perceived and normative aesthetic treatment needs and how the former relates to OHRQoL. Materials and Methods A consecutive sample of 74 patients aged 11-14 years with a 5a Index of Orthodontic Treatment Need (IOTN) was recruited. The children and their parents were asked to fill short forms of the Child Perception Questionnaire (CPQ11-14) and the Parental-Caregiver Perception Questionnaire (P-CPQ), respectively at four time points of the children\u27s orthodontic treatment: T1 (prior to starting treatment), T2 (at the end of the functional appliance phase), T3 (following six months with upper and lower fixed appliances) and T4 (at the end of treatment, three months post-debond). Prior to starting the fixed appliance phase, the children were asked to score their corresponding Aesthetic Component (AC) of IOTN. A calibrated clinician also rated the AC of the children to represent the normative aesthetic treatment need. Results A total of 46 pairs of children and parents completed the questionnaires at the four time points. At the end of treatment, repeated measures analysis of variance (ANOVA) model has shown a statistically significant improvement (P0.5) indicates a moderate level of agreement between parents and children in rating the children\u27s OHRQoL. Poorer levels of agreement are observed at the emotional and social well-being dimensions (ICC