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Effects of extraction and nonextraction therapy with air-rotor stripping on facial esthetics in postadolescent borderline patients.
Am J Orthod Dentofacial Orthop. 2008 Apr; 133(4):539-49.AJ

Abstract

INTRODUCTION

A prospective randomized study was designed to compare the skeletal, dental, and soft-tissue profile changes in Class I borderline patients treated with extraction and nonextraction by means of the air-rotor stripping (ARS) technique and to compare the treatment times.

METHODS

Twenty-six borderline patients with balanced and orthognathic facial profiles were randomly divided into 2 groups. In the first group, 13 subjects with a mean age of 18.1 +/- 3.7 years and mean maxillary and mandibular crowding of 5.7 +/- 1.5 and 5.9 +/- 1.4 mm, respectively, were treated by removal of 4 premolars with minimum anchorage. In the second group, 13 subjects with a mean age of 17.8 +/- 2.4 years and mean maxillary and mandibular crowding of 5.0 +/- 1.3 and 5.9 +/- 1.3 mm, respectively, were treated with ARS. Lateral cephalometric radiographs and dental models taken before and after treatment were evaluated.

RESULTS

The initial skeletal, dental, and profile characteristics of both groups were similar. In the first group, the maxillary and mandibular incisors were slightly retracted, whereas lip positions did not change. In the nonextraction group, maintenance of maxillary incisor position, slight protrusion of the mandibular incisors and the upper and lower lips were observed at the end of treatment. The nasolabial angle decreased significantly. Because of postpubertal growth of the nose and the chin, the lips appeared slightly retrusive after extraction therapy, whereas lip protrusion was compensated in the nonextraction group. The main soft-tissue profile differences between the 2 groups were 1 to 1.5 mm more retruded upper and lower lip positions in the extraction patients, but both groups had well-balanced and desirable facial esthetics with all profile measurements within normal limits. Nonextraction therapy with ARS reduced treatment time by 8 months.

CONCLUSIONS

Both extraction and ARS combined with nonextraction therapies are effective treatment alternatives for Class I borderline patients with good facial profile and moderate dental crowding.

Authors+Show Affiliations

Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey. dgermec@gmail.comNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

18405818

Citation

Germeç, Derya, and Tulin Ugur Taner. "Effects of Extraction and Nonextraction Therapy With Air-rotor Stripping On Facial Esthetics in Postadolescent Borderline Patients." 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. 133, no. 4, 2008, pp. 539-49.
Germeç D, Taner TU. Effects of extraction and nonextraction therapy with air-rotor stripping on facial esthetics in postadolescent borderline patients. Am J Orthod Dentofacial Orthop. 2008;133(4):539-49.
Germeç, D., & Taner, T. U. (2008). Effects of extraction and nonextraction therapy with air-rotor stripping on facial esthetics in postadolescent borderline patients. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 133(4), 539-49. https://doi.org/10.1016/j.ajodo.2006.04.052
Germeç D, Taner TU. Effects of Extraction and Nonextraction Therapy With Air-rotor Stripping On Facial Esthetics in Postadolescent Borderline Patients. Am J Orthod Dentofacial Orthop. 2008;133(4):539-49. PubMed PMID: 18405818.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of extraction and nonextraction therapy with air-rotor stripping on facial esthetics in postadolescent borderline patients. AU - Germeç,Derya, AU - Taner,Tulin Ugur, PY - 2006/01/23/received PY - 2006/04/21/revised PY - 2006/04/28/accepted PY - 2008/4/15/pubmed PY - 2008/4/29/medline PY - 2008/4/15/entrez SP - 539 EP - 49 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 - 133 IS - 4 N2 - INTRODUCTION: A prospective randomized study was designed to compare the skeletal, dental, and soft-tissue profile changes in Class I borderline patients treated with extraction and nonextraction by means of the air-rotor stripping (ARS) technique and to compare the treatment times. METHODS: Twenty-six borderline patients with balanced and orthognathic facial profiles were randomly divided into 2 groups. In the first group, 13 subjects with a mean age of 18.1 +/- 3.7 years and mean maxillary and mandibular crowding of 5.7 +/- 1.5 and 5.9 +/- 1.4 mm, respectively, were treated by removal of 4 premolars with minimum anchorage. In the second group, 13 subjects with a mean age of 17.8 +/- 2.4 years and mean maxillary and mandibular crowding of 5.0 +/- 1.3 and 5.9 +/- 1.3 mm, respectively, were treated with ARS. Lateral cephalometric radiographs and dental models taken before and after treatment were evaluated. RESULTS: The initial skeletal, dental, and profile characteristics of both groups were similar. In the first group, the maxillary and mandibular incisors were slightly retracted, whereas lip positions did not change. In the nonextraction group, maintenance of maxillary incisor position, slight protrusion of the mandibular incisors and the upper and lower lips were observed at the end of treatment. The nasolabial angle decreased significantly. Because of postpubertal growth of the nose and the chin, the lips appeared slightly retrusive after extraction therapy, whereas lip protrusion was compensated in the nonextraction group. The main soft-tissue profile differences between the 2 groups were 1 to 1.5 mm more retruded upper and lower lip positions in the extraction patients, but both groups had well-balanced and desirable facial esthetics with all profile measurements within normal limits. Nonextraction therapy with ARS reduced treatment time by 8 months. CONCLUSIONS: Both extraction and ARS combined with nonextraction therapies are effective treatment alternatives for Class I borderline patients with good facial profile and moderate dental crowding. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/18405818/Effects_of_extraction_and_nonextraction_therapy_with_air_rotor_stripping_on_facial_esthetics_in_postadolescent_borderline_patients_ DB - PRIME DP - Unbound Medicine ER -