Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
3118625 | American Journal of Orthodontics and Dentofacial Orthopedics | 2007 | 8 Pages |
Abstract
Introduction: In this study, we compared the soft-tissue changes and posttreatment status after nonextraction and maxillary premolar extraction treatment in patients with Class II Division 1 malocclusion. Methods: Lateral cephalograms of 44 patients, divided into 2 matching groups, were evaluated. Group 1 comprised 22 patients (10 boys, 12 girls) treated nonextraction with initial and final mean ages of 12.50 and 15.12 years, respectively, and a mean treatment time of 2.62 years. This group had an initial mean overjet of 7.97 mm. Group 2 consisted of 22 patients (10 boys, 12 girls) treated with extractions of 2 maxillary premolars with initial and final mean ages of 12.86 and 15.32 years, respectively. The mean treatment time was 2.46 years, and the initial mean overjet was 8.61 mm. Independent t tests were used to compare the initial and final cephalometric status and the treatment changes between the groups. Results: According to the results, only 1 soft-tissue variable showed a significant treatment change between the groups. However, at the posttreatment stage, there were no significant differences between the soft-tissue variables. Conclusions:: The protocol including extraction of 2 maxillary premolars provides similar soft-tissue results as nonextraction treatment of complete Class II malocclusion.
Related Topics
Health Sciences
Medicine and Dentistry
Dentistry, Oral Surgery and Medicine
Authors
Guilherme Janson, Acácio Fuziy, Marcos Roberto de Freitas, José Fernando Castanha Henriques, Renato Rodrigues de Almeida,