The ABO has three (3) measurement instruments for the examinee to use in evaluation of the cases that are presented to the Board. The three measurement instruments are completed for each case report and are submitted electronically.

1. The Discrepancy Index is a measure of the complexity of an orthodontic case on the pre-treatment dental casts. It is used by the Board in determining the criteria for case presentations. An overview of the Discrepancy Index Scoring System is provided at References for View and Print.
2. The Cast/Radiograph Evaluation is a measure of the results of treatment on the final dental casts and intraoral radiographs. An instructional manual of the grading system for Cast Evaluation is provided at Grading System for Dental Casts and Panoramic Radiographs.
3. The Case Management Form is a measure of the changes in the skeletal, dental and facial aspects of the case.

For your convenience, the ABO has available for purchase a Calibration Kit. The ABO highly recommends the use of its Calibration Kit to assist you in making a qualitative assessment of the records that you plan to use for the clinical exam. This kit contains three sets of pre-measured casts with scoring keys, the grading system instructional manual, and a measuring gauge. The Directors will be using the same grading system contained in this kit to evaluate your treatment results. The Calibration Kit can be found at the eStore.

The following Measurement Instruments can be downloaded at
Case Report Worksheets, Forms and Instructions

	Discrepancy Index Form (doc) Discrepancy Index Scoring Instructions (pdf) An overview of the Discrepancy Index Scoring System is provided at References for View and Print
	Cast-Radiograph Evaluation (doc) Cast-Radiograph Reference Sheet (pdf) A detailed explanation can be viewed at Grading System for Dental Casts and Panoramic Radiograph
	Case Management Form (doc) Case Management Form Instructions (pdf)