IBO Orthodontic Index Part III

A new orthodontic index was proposed by the College of Diplomates to assess the degree of difficulty of cases submitted for the IBO Phase III clinical examinations. This article is the continuation of Parts I and II of the article, which gave a brief insight into the need and the methodology undertaken to formulate this index. A weightage score grading the degree of difficulty was formulated based on the Dental, Cephalometric, and Miscellaneous components. An Aesthetic component was also developed. Further statistical evaluation was done to formulate a cut-off score required for cases submitted for the Phase III examination. This index would help to categorize the malocclusion in a structured manner.