Introduction: The aims of this study were to report contemporary orthodontic extraction frequencies at a university center and to investigate what patient-related factors might influence the likelihood of extraction.
Methods: The records of consecutive patients treated at the University of North Carolina from to were analyzed. Year-by-year rates for overall orthodontic extractions and for extraction of 4 first premolars were calculated. Logistic regression, adjusting for all recorded patient risk factors for extraction, was used to examine both the changes in extraction frequencies over time and the influence of individual patient factors on the odds of extraction.
Results: Small linear decreases in orthodontic extraction frequency overall OR, 0. The overall extraction rate was Four first premolar extraction rates ranged from 8. Extractions were significantly more likely as crowding and overjet increased OR, 1. Conclusions: Extractions were just as likely to be associated with Class II dental and skeletal problems and with open-bite problems as with crowding alone.
Published by Elsevier Inc. All rights reserved. Abstract Introduction: The aims of this study were to report contemporary orthodontic extraction frequencies at a university center and to investigate what patient-related factors might influence the likelihood of extraction.
