Related Experiment Video
Updated: Aug 9, 2026
04:19
The Establishment of a Murine Mandibular Molar Extraction Socket Healing Model
Published on: January 13, 2023
The effect of first premolar extraction on vertical dimension
1Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Summary
Orthodontic treatment involving first premolar extraction in Class I patients did not significantly alter vertical changes compared to nonextraction cases. This finding is crucial for understanding treatment outcomes in orthodontics.
Area of Science:
- Orthodontics
- Dental Cephalometrics
Background:
- Orthodontic treatment planning often involves decisions regarding tooth extraction.
- Understanding the impact of first premolar extraction on vertical facial growth is essential for predicting treatment outcomes.
Purpose of the Study:
- To evaluate and compare vertical skeletal and dental changes in Class I orthodontic patients treated with and without first premolar extractions.
Main Methods:
- Retrospective cephalometric analysis of 80 Class I patients (40 extraction, 40 nonextraction).
- Digitization of pretreatment and posttreatment lateral cephalograms.
- Measurement of 6 linear and 8 angular cephalometric variables to assess vertical changes.
Main Results:
- No statistically significant differences were observed in vertical changes between the first premolar extraction group and the nonextraction group.
- Cephalometric analysis indicated similar vertical skeletal and dental responses regardless of first premolar extraction in Class I patients.
Conclusions:
- Extraction of maxillary and mandibular first premolars in Class I cases does not result in different vertical changes compared to nonextraction orthodontic treatment.
- Clinicians can consider these findings when planning orthodontic treatment for Class I malocclusions, as vertical dimension is not significantly impacted by this extraction pattern.
