Abstract
Abstract – This study aimed to elucidate factors associated with duration of orthodontic treatment. Methods: Retrospective analysis of a systematic 2% sample of cases completed in National Health Service practices in England and Wales. Records were collected during 1991. Characteristics of practitioners, patients, malocclusions, treatment variables and outcomes were evaluated. Data were submitted to multivariate analysis, with Log10 Time in Treatment as the dependent variable. Results: Data were available for 1506 cases. The (geometric) mean time in treatment was 13 months. A model was found that explained 41% of the variance. Factors found to increase duration were fixed appliances, multiple stages in the treatments, premolar extractions, and correction of antero-posterior buccal occlusion. Age, buccal segment malocclusion, DHC (Dental Health Component of the Index of Orthodontic Treatment Need) grade 5 and orthodontically qualified practitioners were also associated with slightly longer treatments. Conclusions: Whilst briefer treatments may be attractive to purchasers, providers and recipients, it should be remembered that thorough treatment, and treatment of more complex malocclusions, tends to take longer. Economic pressures on practitioners to produce high turnovers of cases may be counterproductive in the quest for better outcomes.
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