Tags

Type your tag names separated by a space and hit enter

Occlusal and cephalometric Class II Division 1 malocclusion severity in patients treated with and without extraction of 2 maxillary premolars.
Am J Orthod Dentofacial Orthop. 2006 Jun; 129(6):759-67.AJ

Abstract

INTRODUCTION

The purpose of this study was to compare the initial occlusal and cephalometric severity of Class II Division 1 malocclusion patients treated with and without extraction of 2 maxillary premolars.

METHODS

Dental study models and cephalograms of 62 patients were selected. Those in group 1 (n = 42) were treated without extractions, and those in group 2 (n = 20) were treated with 2 maxillary premolar extractions. Grainger's treatment priority index (TPI) was used to assess the final and the initial occlusal status of each subject. Variables such as overjet and overbite were also evaluated. Independent t tests were used to compare the occlusal variables at the posttreatment stage, the occlusal and cephalometric variables at the pretreatment stage, and the improvement in TPI values between the groups.

RESULTS

Patients treated with 2 maxillary premolar extractions had greater initial occlusal TPI values, overjets, cephalometric apical base anteroposterior discrepancies, maxillary incisor protrusions, and anteroposterior molar discrepancies than those treated without extractions.

CONCLUSIONS

For patients with more severe anteroposterior discrepancies, an extraction plan provides more effective treatment with less need for patient compliance.

Authors+Show Affiliations

Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil. jansong@travelnet.com.brNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

16769494

Citation

Janson, Guilherme, et al. "Occlusal and Cephalometric Class II Division 1 Malocclusion Severity in Patients Treated With and Without Extraction of 2 Maxillary Premolars." 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. 129, no. 6, 2006, pp. 759-67.
Janson G, Graciano JT, Henriques JF, et al. Occlusal and cephalometric Class II Division 1 malocclusion severity in patients treated with and without extraction of 2 maxillary premolars. Am J Orthod Dentofacial Orthop. 2006;129(6):759-67.
Janson, G., Graciano, J. T., Henriques, J. F., de Freitas, M. R., Pinzan, A., & Pinzan-Vercelino, C. R. (2006). Occlusal and cephalometric Class II Division 1 malocclusion severity in patients treated with and without extraction of 2 maxillary premolars. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 129(6), 759-67.
Janson G, et al. Occlusal and Cephalometric Class II Division 1 Malocclusion Severity in Patients Treated With and Without Extraction of 2 Maxillary Premolars. Am J Orthod Dentofacial Orthop. 2006;129(6):759-67. PubMed PMID: 16769494.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Occlusal and cephalometric Class II Division 1 malocclusion severity in patients treated with and without extraction of 2 maxillary premolars. AU - Janson,Guilherme, AU - Graciano,João Tadeu Amim, AU - Henriques,José Fernando Castanha, AU - de Freitas,Marcos Roberto, AU - Pinzan,Arnaldo, AU - Pinzan-Vercelino,Célia Regina Maio, PY - 2004/07/16/received PY - 2004/11/24/revised PY - 2004/11/24/accepted PY - 2006/6/14/pubmed PY - 2006/6/27/medline PY - 2006/6/14/entrez SP - 759 EP - 67 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 - 129 IS - 6 N2 - INTRODUCTION: The purpose of this study was to compare the initial occlusal and cephalometric severity of Class II Division 1 malocclusion patients treated with and without extraction of 2 maxillary premolars. METHODS: Dental study models and cephalograms of 62 patients were selected. Those in group 1 (n = 42) were treated without extractions, and those in group 2 (n = 20) were treated with 2 maxillary premolar extractions. Grainger's treatment priority index (TPI) was used to assess the final and the initial occlusal status of each subject. Variables such as overjet and overbite were also evaluated. Independent t tests were used to compare the occlusal variables at the posttreatment stage, the occlusal and cephalometric variables at the pretreatment stage, and the improvement in TPI values between the groups. RESULTS: Patients treated with 2 maxillary premolar extractions had greater initial occlusal TPI values, overjets, cephalometric apical base anteroposterior discrepancies, maxillary incisor protrusions, and anteroposterior molar discrepancies than those treated without extractions. CONCLUSIONS: For patients with more severe anteroposterior discrepancies, an extraction plan provides more effective treatment with less need for patient compliance. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/16769494/Occlusal_and_cephalometric_Class_II_Division_1_malocclusion_severity_in_patients_treated_with_and_without_extraction_of_2_maxillary_premolars_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(06)00260-5 DB - PRIME DP - Unbound Medicine ER -