Related Experiment Videos
External apical root resorption following orthodontic treatment.
S McNab1, D Battistutta, A Taverne
1Faculty of Health, Queensland University of Technology, Brisbane, Australia.
The Angle Orthodontist
|August 5, 2000
Summary
Orthodontic treatment can cause external apical root resorption (EARR). Appliance type and tooth extractions significantly increase EARR risk, particularly with Begg appliances and performed extractions.
Area of Science:
- Dentistry
- Orthodontics
- Dental Imaging
Background:
- External apical root resorption (EARR) is a potential complication of orthodontic treatment.
- Understanding risk factors is crucial for patient management and treatment planning.
Purpose of the Study:
- To investigate the association between orthodontic appliance type and tooth extraction on the incidence of EARR in posterior teeth.
- To quantify the increased risk of EARR associated with specific appliances and extraction protocols.
Main Methods:
- Retrospective analysis of pre- and posttreatment orthopantomograms from 97 orthodontic patients.
- Utilized a 4-grade ordinal scale to assess the severity of EARR.
- Statistical analysis adjusted for age, overbite, overjet, headgear use, and appliance type.
Main Results:
- EARR incidence showed a positive association with tooth position, appliance type, and extractions.
- Begg appliances were associated with 2.30 times higher EARR incidence compared to edgewise appliances.
- Tooth extractions increased EARR incidence by 3.72 times.
Conclusions:
- Both orthodontic appliance selection and the decision to perform tooth extractions are significant factors influencing the development of EARR.
- Clinicians should consider these factors to mitigate the risk of root resorption during orthodontic therapy.