Meta analysis of the treatment-related factors of external apical root resorption

摘要

Authors -Segal GR, Schiffman PH, Tuncay OC Objective -To elucidate possible treatment-related etiological factors - such as, duration of treatment and apical displacement - for external root resorption. Design - Meta-analysis of the available English-language literature. Inclusion & Exclusion Criteria - Papers with a sample size >10, fixed appliances, pre- and post-operative radiographs, and apical displacement recorded were included. History of trauma, prior root resorption and endodontic treatment were excluded. Appropriateness of these selections was tested with a 'funnel plot' analysis. Outcome Measure - Correlations between root resorption, apical displacement, and treatment duration. Results - Mean apical root resorption was strongly correlated with total apical displacement (r - 0.822) and treatment duration (r= 0.852). Conclusion -The treatment-related causes of root resorption appear to be the total distance the apex had moved and the time it took.