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Orthodontic treatment time in 2- and 4-premolar-extraction protocols.
Am J Orthod Dentofacial Orthop. 2006 May; 129(5):666-71.AJ

Abstract

INTRODUCTION

The purpose of this study was to compare the treatment times of complete Class II malocclusions treated with 2- and 4-premolar-extraction protocols.

METHODS

Ninety-seven patients were selected and divided into 2 groups, according to the 2 extraction criteria. Group 1, treated with 2 maxillary premolar extractions, consisted of 49 patients (30 male, 19 female) with a mean age of 14.35 years. Group 2, treated with 4 premolar extractions, consisted of 48 patients (27 male, 21 female) with a mean age of 13.03 years. Treatment times of the groups were compared with the t test.

RESULTS

Treatment times were significantly shorter with the 2-premolar-extraction protocol compared with the 4-premolar-extraction protocol.

CONCLUSIONS

Treatment time will be shorter and the occlusal results more predictable with a 2-premolar-extraction protocol compared with 4 premolar extractions.

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 available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article

Language

eng

PubMed ID

16679207

Citation

Janson, Guilherme, et al. "Orthodontic Treatment Time in 2- and 4-premolar-extraction Protocols." 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. 5, 2006, pp. 666-71.
Janson G, Maria FR, Barros SE, et al. Orthodontic treatment time in 2- and 4-premolar-extraction protocols. Am J Orthod Dentofacial Orthop. 2006;129(5):666-71.
Janson, G., Maria, F. R., Barros, S. E., Freitas, M. R., & Henriques, J. F. (2006). Orthodontic treatment time in 2- and 4-premolar-extraction protocols. 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(5), 666-71.
Janson G, et al. Orthodontic Treatment Time in 2- and 4-premolar-extraction Protocols. Am J Orthod Dentofacial Orthop. 2006;129(5):666-71. PubMed PMID: 16679207.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Orthodontic treatment time in 2- and 4-premolar-extraction protocols. AU - Janson,Guilherme, AU - Maria,Fábio Rogério Torres, AU - Barros,Sérgio Estelita Cavalcante, AU - Freitas,Marcos Roberto de, AU - Henriques,José Fernando Castanha, PY - 2004/07/04/received PY - 2004/09/04/revised PY - 2004/09/04/accepted PY - 2006/5/9/pubmed PY - 2006/5/24/medline PY - 2006/5/9/entrez SP - 666 EP - 71 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 - 5 N2 - INTRODUCTION: The purpose of this study was to compare the treatment times of complete Class II malocclusions treated with 2- and 4-premolar-extraction protocols. METHODS: Ninety-seven patients were selected and divided into 2 groups, according to the 2 extraction criteria. Group 1, treated with 2 maxillary premolar extractions, consisted of 49 patients (30 male, 19 female) with a mean age of 14.35 years. Group 2, treated with 4 premolar extractions, consisted of 48 patients (27 male, 21 female) with a mean age of 13.03 years. Treatment times of the groups were compared with the t test. RESULTS: Treatment times were significantly shorter with the 2-premolar-extraction protocol compared with the 4-premolar-extraction protocol. CONCLUSIONS: Treatment time will be shorter and the occlusal results more predictable with a 2-premolar-extraction protocol compared with 4 premolar extractions. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/16679207/Orthodontic_treatment_time_in_2__and_4_premolar_extraction_protocols_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(06)00012-6 DB - PRIME DP - Unbound Medicine ER -