Patient-associated and treatment-related predictive factors influencing the duration of orthodontic treatment with fixed appliances

Class II compared with Class I and the presence of at least one impacted tooth were significant patient-related factors, while dual-arch orthodontic treatment, preferring bands over tubes, and including at least one extraction in the treatment plan were significant treatment-related factors for prolonged therapy. Class II (nonsubdivision) was associated with extended duration in contrast with Class II subdivision.