Discrepancy Index and treatment time
During the past many decades, considerable efforts have been made to develop reliable and standardized measurement tools in orthodontics. Quantitative indices like the peer assessment rating (PAR) and the objective grading system (OGS) have been successfully used so far to assess outcomes of an orthodontic treatment, but these are limited to occlusal aspects only (Cangialosi, 2004).
The American Board of Orthodontics’ (ABO’s) main goal is clinical excellence as it aims to deliver high quality orthodontics. With this goal in mind, it has devised a tool, the Discrepancy Index (DI) with an intention of providing an objective evaluation