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Overjet, overbite, and anterior crowding relapses in extraction and nonextraction patients, and their correlations.
Am J Orthod Dentofacial Orthop. 2014 Jul; 146(1):67-72.AJ

Abstract

INTRODUCTION

In this study, we aimed to compare the relapse of maxillary and mandibular anterior crowding, overjet, and overbite 5 years after treatment in subjects with Class I and Class II malocclusions treated with and without extractions, and also to evaluate the correlations among these factors.

METHODS

The sample comprised 84 subjects with Class I and Class II malocclusions, treated with and without extractions. Group 1 comprised 44 subjects with an initial mean age of 12.96 years treated without extractions. Group 2 included 40 subjects with an initial mean age of 13.01 years treated with 4 premolar extractions. Data were obtained from dental casts at the pretreatment, posttreatment, and long-term posttreatment stages. Intergroup comparisons were performed with t tests. To verify the correlations among the relapse of overjet, overbite, and anterior crowding, the Pearson correlation test was used.

RESULTS

Maxillary incisor irregularity and its relapse in the nonextraction group were significantly greater at the long-term posttreatment stage and the long-term posttreatment period, respectively. Long-term postreatment overjet changes were similar in the groups. Overbite and its relapse were significantly greater in the extraction group in the long-term posttreatment stage and period, respectively. There was a positive correlation of the relapse of mandibular incisor crowding with the relapse of overjet and overbite, and also a correlation of overjet and overbite relapses.

CONCLUSIONS

There was greater maxillary crowding relapse in the nonextraction group and greater overbite relapse in the extraction group. There were significant and positive correlations of overjet and overbite relapses with mandibular anterior crowding relapse and consequently between overjet and overbite relapses.

Authors+Show Affiliations

Graduate student, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil. Electronic address: manuff@usp.br.Professor, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.Associate professor, Department of Orthodontics, Ingá Dental School, Maringá, Paraná, Brazil.Graduate student, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.Graduate student, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.Professor, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.Professor, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

24975000

Citation

Francisconi, Manoela Fávaro, et al. "Overjet, Overbite, and Anterior Crowding Relapses in Extraction and Nonextraction Patients, and Their Correlations." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 146, no. 1, 2014, pp. 67-72.
Francisconi MF, Janson G, Freitas KM, et al. Overjet, overbite, and anterior crowding relapses in extraction and nonextraction patients, and their correlations. Am J Orthod Dentofacial Orthop. 2014;146(1):67-72.
Francisconi, M. F., Janson, G., Freitas, K. M., Oliveira, R. C., Oliveira, R. C., Freitas, M. R., & Henriques, J. F. (2014). Overjet, overbite, and anterior crowding relapses in extraction and nonextraction patients, and their correlations. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 146(1), 67-72. https://doi.org/10.1016/j.ajodo.2014.04.012
Francisconi MF, et al. Overjet, Overbite, and Anterior Crowding Relapses in Extraction and Nonextraction Patients, and Their Correlations. Am J Orthod Dentofacial Orthop. 2014;146(1):67-72. PubMed PMID: 24975000.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Overjet, overbite, and anterior crowding relapses in extraction and nonextraction patients, and their correlations. AU - Francisconi,Manoela Fávaro, AU - Janson,Guilherme, AU - Freitas,Karina Maria Salvatore, AU - Oliveira,Renata Cristina Gobbi de, AU - Oliveira,Ricardo César Gobbi de, AU - Freitas,Marcos Roberto de, AU - Henriques,José Fernando Castanha, PY - 2013/10/01/received PY - 2014/04/01/revised PY - 2014/04/01/accepted PY - 2014/7/1/entrez PY - 2014/7/1/pubmed PY - 2014/9/12/medline SP - 67 EP - 72 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 146 IS - 1 N2 - INTRODUCTION: In this study, we aimed to compare the relapse of maxillary and mandibular anterior crowding, overjet, and overbite 5 years after treatment in subjects with Class I and Class II malocclusions treated with and without extractions, and also to evaluate the correlations among these factors. METHODS: The sample comprised 84 subjects with Class I and Class II malocclusions, treated with and without extractions. Group 1 comprised 44 subjects with an initial mean age of 12.96 years treated without extractions. Group 2 included 40 subjects with an initial mean age of 13.01 years treated with 4 premolar extractions. Data were obtained from dental casts at the pretreatment, posttreatment, and long-term posttreatment stages. Intergroup comparisons were performed with t tests. To verify the correlations among the relapse of overjet, overbite, and anterior crowding, the Pearson correlation test was used. RESULTS: Maxillary incisor irregularity and its relapse in the nonextraction group were significantly greater at the long-term posttreatment stage and the long-term posttreatment period, respectively. Long-term postreatment overjet changes were similar in the groups. Overbite and its relapse were significantly greater in the extraction group in the long-term posttreatment stage and period, respectively. There was a positive correlation of the relapse of mandibular incisor crowding with the relapse of overjet and overbite, and also a correlation of overjet and overbite relapses. CONCLUSIONS: There was greater maxillary crowding relapse in the nonextraction group and greater overbite relapse in the extraction group. There were significant and positive correlations of overjet and overbite relapses with mandibular anterior crowding relapse and consequently between overjet and overbite relapses. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/24975000/Overjet_overbite_and_anterior_crowding_relapses_in_extraction_and_nonextraction_patients_and_their_correlations_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(14)00375-8 DB - PRIME DP - Unbound Medicine ER -