Pont’s index in study models of patients who fi nished a non-extraction orthodontic treatment at the Orthodontic Clinic of the Postgraduate Studies and Research Division of the National University of Mexico

Abstract

Diagnostic indexes are important to predict dental arch size and to suggest the most appropriate treatment plan for each patient. Pont designed a method to determine the width of an ideal dental arch, based on the mesiodistal measurements of the crowns of the upper incisor; besides he provided formulas to obtain norms. The purpose of this study was to determine if Pont’s index norms match the results obtained after non-extraction orthodontic treatment. A cross-sectional, descriptive and comparative study was performed to 54 study models. The statistical analysis showed that there’s a significant difference between Pont’s index norms and the measurements obtained from the models.Key words: Pont´s index, non-extraction orthodontic treatment