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Transverse implications of maxillary premolar extraction in Class III presurgical orthodontic treatment.
Am J Orthod Dentofacial Orthop. 2006 Jun; 129(6):740-8.AJ

Abstract

INTRODUCTION

Maxillary premolars are often extracted to resolve incisor proclination in presurgical orthodontic treatment for severe skeletal Class III patients. The aim of this article was to compare arch-width changes and orthodontic tooth movements between maxillary premolar extraction and nonextraction modalities, and to provide an additional indication for presurgical maxillary premolar extraction according to the transverse dental arch characteristics of Class III surgical-orthodontic patients.

METHODS

Pretreatment and posttreatment dental casts of 55 adult Class III patients (24 nonextraction, 31 extraction) who underwent surgical-orthodontic treatment were collected. The changes in maxillary and mandibular dental arch widths were measured from the canines to the second molars. Orthodontic tooth movement was evaluated with an angulation-and-inclination measuring gauge.

RESULTS

Statistical analyses showed that intermaxillary arch congruity was attributed mainly to maxillary arch-width changes. The arch-width changes could be interpreted as the result of inclination changes in both posterior dentitions. For the arch-width change, analysis of covariance (ANCOVA) showed a significant extraction effect: the premolar extraction group's ability to accommodate arch-width change was significantly greater than that of the nonextraction group.

CONCLUSIONS

The indications for maxillary premolar extraction in Class III presurgical orthodontic treatment might depend in part on the characteristics of the maxillary arch width and posterior teeth inclinations.

Authors+Show Affiliations

Department of Orthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, South Korea.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

16769492

Citation

Lee, Shin-Jae, et al. "Transverse Implications of Maxillary Premolar Extraction in Class III Presurgical Orthodontic Treatment." 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. 740-8.
Lee SJ, Kim TW, Nahm DS. Transverse implications of maxillary premolar extraction in Class III presurgical orthodontic treatment. Am J Orthod Dentofacial Orthop. 2006;129(6):740-8.
Lee, S. J., Kim, T. W., & Nahm, D. S. (2006). Transverse implications of maxillary premolar extraction in Class III presurgical orthodontic treatment. 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), 740-8.
Lee SJ, Kim TW, Nahm DS. Transverse Implications of Maxillary Premolar Extraction in Class III Presurgical Orthodontic Treatment. Am J Orthod Dentofacial Orthop. 2006;129(6):740-8. PubMed PMID: 16769492.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Transverse implications of maxillary premolar extraction in Class III presurgical orthodontic treatment. AU - Lee,Shin-Jae, AU - Kim,Tae-Woo, AU - Nahm,Dong-Seok, PY - 2004/07/22/received PY - 2006/02/03/revised PY - 2006/02/03/accepted PY - 2006/6/14/pubmed PY - 2006/6/27/medline PY - 2006/6/14/entrez SP - 740 EP - 8 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: Maxillary premolars are often extracted to resolve incisor proclination in presurgical orthodontic treatment for severe skeletal Class III patients. The aim of this article was to compare arch-width changes and orthodontic tooth movements between maxillary premolar extraction and nonextraction modalities, and to provide an additional indication for presurgical maxillary premolar extraction according to the transverse dental arch characteristics of Class III surgical-orthodontic patients. METHODS: Pretreatment and posttreatment dental casts of 55 adult Class III patients (24 nonextraction, 31 extraction) who underwent surgical-orthodontic treatment were collected. The changes in maxillary and mandibular dental arch widths were measured from the canines to the second molars. Orthodontic tooth movement was evaluated with an angulation-and-inclination measuring gauge. RESULTS: Statistical analyses showed that intermaxillary arch congruity was attributed mainly to maxillary arch-width changes. The arch-width changes could be interpreted as the result of inclination changes in both posterior dentitions. For the arch-width change, analysis of covariance (ANCOVA) showed a significant extraction effect: the premolar extraction group's ability to accommodate arch-width change was significantly greater than that of the nonextraction group. CONCLUSIONS: The indications for maxillary premolar extraction in Class III presurgical orthodontic treatment might depend in part on the characteristics of the maxillary arch width and posterior teeth inclinations. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/16769492/Transverse_implications_of_maxillary_premolar_extraction_in_Class_III_presurgical_orthodontic_treatment_ DB - PRIME DP - Unbound Medicine ER -