American board of orthodontics- discrepancy index (ABO-DI) as prognostic factor for the duration of orthodontic treatment: A cross-sectional retrospective study

---

Original Article

Author Details : Surendra Kumar Sewda*, Satinder Pal Singh, Vinay Kumar, Ashok Utreja

Volume : 8, Issue : 4, Year : 2024

Article Page : 486-490

https://doi.org/10.18231/j.jco.2024.073

Suggest article by email

---

Abstract

Objective: To evaluate American Board of Orthodontics-Discrepancy Index (ABO-DI) as a prognostic factor in predicting the duration of orthodontic treatment.
Materials and Methods: This cross-sectional retrospective study was conducted on the pre-treatment and post-treatment records of 151 consecutively de-bonded cases, who were treated between January 2016 and September 2013 with comprehensive orthodontic therapy. The ABO-DI was used to assess the pretreatment severity of malocclusion. The sample was divided into three groups based upon the discrepancy score calculated from pretreatment study model and lateral cephalogram; Group-1 (DI score <16 xss=removed xss=removed> 25; n=37). The duration of orthodontic treatment was calculated as total treatment time (in months) from the date of placement of initial brackets and archwires to the date when orthodontic appliances were removed. Spearman’s correlation test and One way ANOVA analysis followed by Post-Hoc tests for multiple comparisons were used to assess the association between the ABO-DI scores and duration of orthodontic treatment.
Results: The mean duration of treatment for Group-1, Group-2 and Group-3 was found to be 25.83±8.42, 28.16±10.55 and 28.84±9.61 months respectively, but there was no statistically significant relationship between the severity of malocclusion on the duration of comprehensive orthodontic treatment (P>0.05). An insignificant correlation (P=0.102, r= -0.134) between different groups of severity of DI scores and treatment duration was revealed with Spearman test.
Conclusion: The duration of orthodontic treatment increased with increase in severity of malocclusion, however, it is not a reliable tool for predicting the treatment duration.

Keywords: ABO­Discrepancy index, Orthodontic Treatment duration, Severity of Malocclusion, Prognostic factor

How to cite : Sewda S K, Singh S P, Kumar V, Utreja A, American board of orthodontics- discrepancy index (ABO-DI) as prognostic factor for the duration of orthodontic treatment: A cross-sectional retrospective study. J Contemp Orthod 2024;8(4):486-490

This is an Open Access (OA) journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International, which allows others to remix, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.