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Maxillary anterior alignment stability in Class I and Class II malocclusions treated with or without extraction.
Angle Orthod. 2016 Jan; 86(1):3-9.AO

Abstract

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.

Authors+Show Affiliations

a Orthodontic graduate student, Department of Orthodontics, Bauru Dental School, University of São Paulo, São Paulo, Brazil.b Associate Professor, Department of Orthodontics, Ingá Dental School, Maringá, Brazil.c Professor, Department of Orthodontics, Bauru Dental School, University of São Paulo, São Paulo, Brazil.c Professor, Department of Orthodontics, Bauru Dental School, University of São Paulo, São Paulo, Brazil.a Orthodontic graduate student, Department of Orthodontics, Bauru Dental School, University of São Paulo, São Paulo, Brazil.

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

25844507

Citation

Guirro, Willian Juarez Granucci, et al. "Maxillary Anterior Alignment Stability in Class I and Class II Malocclusions Treated With or Without Extraction." The Angle Orthodontist, vol. 86, no. 1, 2016, pp. 3-9.
Guirro WJ, Freitas KM, Janson G, et al. Maxillary anterior alignment stability in Class I and Class II malocclusions treated with or without extraction. Angle Orthod. 2016;86(1):3-9.
Guirro, W. J., Freitas, K. M., Janson, G., de Freitas, M. R., & Quaglio, C. L. (2016). Maxillary anterior alignment stability in Class I and Class II malocclusions treated with or without extraction. The Angle Orthodontist, 86(1), 3-9. https://doi.org/10.2319/112614-847.1
Guirro WJ, et al. Maxillary Anterior Alignment Stability in Class I and Class II Malocclusions Treated With or Without Extraction. Angle Orthod. 2016;86(1):3-9. PubMed PMID: 25844507.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Maxillary anterior alignment stability in Class I and Class II malocclusions treated with or without extraction. AU - Guirro,Willian Juarez Granucci, AU - Freitas,Karina Maria Salvatore, AU - Janson,Guilherme, AU - de Freitas,Marcos Roberto, AU - Quaglio,Camila Leite, Y1 - 2015/04/06/ PY - 2015/4/7/entrez PY - 2015/4/7/pubmed PY - 2017/9/16/medline KW - Maxillary crowding KW - Relapse KW - Stability SP - 3 EP - 9 JF - The Angle orthodontist JO - Angle Orthod VL - 86 IS - 1 N2 - 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. SN - 1945-7103 UR - https://www.unboundmedicine.com/medline/citation/25844507/Maxillary_anterior_alignment_stability_in_Class_I_and_Class_II_malocclusions_treated_with_or_without_extraction_ L2 - https://meridian.allenpress.com/angle-orthodontist/article-lookup/doi/10.2319/112614-847.1 DB - PRIME DP - Unbound Medicine ER -