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PAR evaluation of treated Class I extraction patients
Karina Maria Salvatore Freitas1, Daniel Salvatore Freitas, Fabrício Pinelli Valarelli
1Department of Orthodontics, Bauru Dental School, University of São Paulo, Brazil. kmsf@uol.com.br
The Angle Orthodontist
|February 7, 2008
Summary
Orthodontic treatment involving four premolar extractions significantly improved occlusion in Class I patients. This approach achieved a high standard of finishing, particularly effective for severe malocclusions.
Area of Science:
- Orthodontics
- Dentistry
- Craniofacial Biology
Background:
- Class I malocclusion presents common challenges in orthodontic treatment.
- Achieving high-quality occlusal finishing is a primary goal in orthodontics.
Purpose of the Study:
- To assess treatment changes and the quality of occlusal finishing in Class I malocclusion patients.
- To evaluate the effectiveness of orthodontic treatment utilizing four premolar extractions.
Main Methods:
- Analysis of dental casts from 94 Class I patients (50 males, 44 females).
- Mean age at the start of treatment was 13.46 years; mean treatment duration was 2.09 years.
- Peer Assessment Rating (PAR) index used to quantify malocclusion severity before and after treatment.
Main Results:
- The mean PAR index decreased from 29.46 to 6.32, indicating an average improvement of 78.54%.
- A significant correlation was observed between initial malocclusion severity and the degree of treatment correction.
- More severe initial malocclusions showed greater improvements post-treatment.
Conclusions:
- Orthodontic treatment with four premolar extractions resulted in a high standard of occlusal finishing.
- This treatment modality is effective in managing Class I malocclusions, with outcomes improving with initial severity.
