Orthodontic treatment results evaluated for individual teeth according to the Objective Grading System

Abstract

BackgroundThe evaluation of orthodontic treatment outcome is usually performed using the Objective Grading System (OGS) developed by the American Board of Orthodontics (ABO). The objective of this study was to evaluate individual tooth contribution to the final OGS score in patients who have finished the orthodontic treatment at the graduate program at Antioquia University. MethodDescriptive, retrospective, cross-sectional study of 40 nonrandomly selected patients. Using the eight OGS criteria, each tooth characteristic was evaluated. ResultsThe total average OGS score was 30.7 ± 8.0. The variable giving the lowest score was for interproximal spaces and the higher was for buccolingual inclination (5.4 ± 2.7). For teeth groups, there are significant differences (P < 0.05). The major contributors to the final score were second molar teeth (9.9 ± 3.7) and per individual tooth was the upper right second molar for buccolingual inclination and marginal ridges (2.73 ± 1.2). There is no correlation between OGS variables except for upper central incisor scores. ConclusionsSecond molar teeth are the main contributors to OGS final score, specifically right second molar inclination. Interproximal spaces are the least relevant aspects to the score. Knowledge of differential tooth and variable contribution is useful to the clinician's care of relevant details.