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Arch-width and perimeter changes in patients with borderline Class I malocclusion treated with extractions or without extractions with air-rotor stripping.
Am J Orthod Dentofacial Orthop. 2010 Jun; 137(6):734.e1-7; discussion 734-5.AJ

Abstract

INTRODUCTION

The aim of this study was to compare dental arch-width and perimeter changes in patients with borderline Class I occlusion, treated with extractions or without extractions with air-rotor stripping (ARS).

METHODS

The study was conducted with 26 sets of pretreatment and posttreatment dental models of patients with borderline Class I occlusion. Thirteen patients (mean age, 18.1 +/- 3.7 years) were treated with 4 premolar extractions, and 13 (mean age, 17.8 +/- 2.4 years) were treated without extractions but with the ARS technique. Mean maxillary and mandibular crowding values were 5.7 +/- 1.5 and 5.9 +/- 1.4 mm in the extraction group, and 5.0 +/- 1.3 and 5.9 +/- 1.3 mm in the nonextraction group, respectively. A digital caliper was used to measure maxillary and mandibular intercanine and intermolar arch widths and arch perimeters. The Wilcoxon test was used to evaluate treatment changes in each group. The Mann-Whitney U test was used to compare the pretreatment and posttreatment values and the treatment changes between the 2 groups.

RESULTS

At the start of treatment, the maxillary and mandibular intercanine and intermolar widths and the arch perimeters of both groups did not differ statistically. The maxillary intercanine widths were maintained in both groups. The maxillary and mandibular intermolar widths and arch perimeters decreased in the extraction group. In the nonextraction group, intermolar widths decreased, but arch perimeters did not change significantly. After treatment, the maxillary and mandibular intercanine widths were not different between the groups.

CONCLUSIONS

In Class I borderline patients with moderate crowding, extraction therapy with minimum anchorage did not result in narrower dental arches, and nonextraction treatment with ARS preserved the intercanine arch widths and arch perimeters.

Authors+Show Affiliations

Department of Orthodontics, Yeditepe University, Istanbul, Turkey. dgermec@gmail.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

20685525

Citation

Germec-Cakan, Derya, et al. "Arch-width and Perimeter Changes in Patients With Borderline Class I Malocclusion Treated With Extractions or Without Extractions With Air-rotor Stripping." 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. 137, no. 6, 2010, pp. 734.e1-7; discussion 734-5.
Germec-Cakan D, Taner TU, Akan S. Arch-width and perimeter changes in patients with borderline Class I malocclusion treated with extractions or without extractions with air-rotor stripping. Am J Orthod Dentofacial Orthop. 2010;137(6):734.e1-7; discussion 734-5.
Germec-Cakan, D., Taner, T. U., & Akan, S. (2010). Arch-width and perimeter changes in patients with borderline Class I malocclusion treated with extractions or without extractions with air-rotor stripping. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 137(6), e1-7; discussion 734-5. https://doi.org/10.1016/j.ajodo.2009.12.023
Germec-Cakan D, Taner TU, Akan S. Arch-width and Perimeter Changes in Patients With Borderline Class I Malocclusion Treated With Extractions or Without Extractions With Air-rotor Stripping. Am J Orthod Dentofacial Orthop. 2010;137(6):734.e1-7; discussion 734-5. PubMed PMID: 20685525.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Arch-width and perimeter changes in patients with borderline Class I malocclusion treated with extractions or without extractions with air-rotor stripping. AU - Germec-Cakan,Derya, AU - Taner,Tulin Ugur, AU - Akan,Seden, PY - 2009/10/01/received PY - 2009/12/01/revised PY - 2009/12/01/accepted PY - 2010/8/6/entrez PY - 2010/8/6/pubmed PY - 2010/8/24/medline SP - 734.e1-7; discussion 734-5 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 - 137 IS - 6 N2 - INTRODUCTION: The aim of this study was to compare dental arch-width and perimeter changes in patients with borderline Class I occlusion, treated with extractions or without extractions with air-rotor stripping (ARS). METHODS: The study was conducted with 26 sets of pretreatment and posttreatment dental models of patients with borderline Class I occlusion. Thirteen patients (mean age, 18.1 +/- 3.7 years) were treated with 4 premolar extractions, and 13 (mean age, 17.8 +/- 2.4 years) were treated without extractions but with the ARS technique. Mean maxillary and mandibular crowding values were 5.7 +/- 1.5 and 5.9 +/- 1.4 mm in the extraction group, and 5.0 +/- 1.3 and 5.9 +/- 1.3 mm in the nonextraction group, respectively. A digital caliper was used to measure maxillary and mandibular intercanine and intermolar arch widths and arch perimeters. The Wilcoxon test was used to evaluate treatment changes in each group. The Mann-Whitney U test was used to compare the pretreatment and posttreatment values and the treatment changes between the 2 groups. RESULTS: At the start of treatment, the maxillary and mandibular intercanine and intermolar widths and the arch perimeters of both groups did not differ statistically. The maxillary intercanine widths were maintained in both groups. The maxillary and mandibular intermolar widths and arch perimeters decreased in the extraction group. In the nonextraction group, intermolar widths decreased, but arch perimeters did not change significantly. After treatment, the maxillary and mandibular intercanine widths were not different between the groups. CONCLUSIONS: In Class I borderline patients with moderate crowding, extraction therapy with minimum anchorage did not result in narrower dental arches, and nonextraction treatment with ARS preserved the intercanine arch widths and arch perimeters. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/20685525/Arch_width_and_perimeter_changes_in_patients_with_borderline_Class_I_malocclusion_treated_with_extractions_or_without_extractions_with_air_rotor_stripping_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(10)00146-0 DB - PRIME DP - Unbound Medicine ER -