Georgeta Zegan, Eduard Radu Cernei, Daniela Anistoroaei, Alina Sodor
In this longitudinal study we evaluated the risk factors for the effectiveness of orthodontic treatment in mixed dentition on a sample of 110 patients (52 boys and 58 girls) aged 6 to 10 years in northeastern Romania in the active phases of orthodontic treatment. 13.6% of patients were quitted the treatment or did not come to scheduled appointments. Initially, removable functional appliances were used in 54.7% of patients and myofunctional activators in 45.3% of patients. After evaluating the 6-month treatment results (good in 64.7% patients and poor in 64.7% patients), the appliances were changed according to patient compliance and dental hygiene status. The treatment outcomes after 12 months were good in 78% of patients and decreased in 22% of patients. The effectiveness of orthodontic treatment in mixed dentition has depended both on parents’ understanding of the need for treatment, but also on patient co-operation and compliance.