Maxillary anterior alignment stability in Class I and Class II malocclusions treated with or without extraction
| Autor: | Karina Maria Salvatore de Freitas, Marcos Roberto de Freitas, Willian J. G. Guirro, Camila Leite Quaglio, Guilherme Janson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Adolescent
business.industry Dentistry Orthodontics 030206 dentistry Original Articles Malocclusion Angle Class I Class i malocclusion Malocclusion Angle Class II medicine.disease 03 medical and health sciences 0302 clinical medicine Maxillary incisor Tooth Extraction medicine Maxilla Humans EXTRAÇÃO DENTÁRIA Malocclusion business Child 030217 neurology & neurosurgery |
| Zdroj: | Angle Orthod Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | Objective: To compare the postretention stability of maxillary incisors alignment in subjects with Class I and II malocclusion treated with or without extractions. Materials and Methods: The sample comprised 103 subjects with initial maxillary anterior irregularity greater than 3 mm and was divided into four groups: group 1 comprised 19 patients with Class I malocclusion treated with nonextraction (mean initial age = 13.06 years); group 2 comprised 19 patients with Class II malocclusion treated with nonextraction (mean initial age = 12.54 years); group 3 comprised 30 patients with Class I malocclusion treated with extractions (mean initial age = 13.16 years); group 4 comprised 35 patients with Class II malocclusion treated with extractions (mean initial age = 12.99 years). Dental casts were obtained at three different stages: pretreatment (T1), posttreatment (T2), and long-term posttreatment (T3). Maxillary incisor irregularity and arch dimensions were evaluated. Intergroup comparisons were performed by one-way analysis of variance followed by Tukey tests. Results: In the long-term posttreatment period, relapse of maxillary crowding and arch dimensions was similar in all groups. Conclusion: Changes in maxillary anterior alignment in Class I and Class II malocclusions treated with nonextractions and with extractions were similar in the long-term posttreatment period. |
| Databáze: | OpenAIRE |
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