Uvulo-glossopharyngeal dimensions in non-extraction, extraction with minimum anchorage, and extraction with maximum anchorage.
The aim of this study was to investigate upper respiratory airway dimensions in non-extraction and extraction subjects treated with minimum or maximum anchorage. Lateral cephalograms of 39 Class I subjects were divided into three groups (each containing 11 females and 2 males) according to treatment procedure: group 1, 13 patients treated with extraction of four premolars and minimum anchorage; group 2, 13 cases treated non-extraction with air-rotor stripping (ARS); and group 3, 13 bimaxillary protrusion subjects treated with extraction of four premolars and maximum anchorage. The mean ages of the patients were 18.1 ± 3.7, 17.8 ± 2.4, and 15.5 ± 0.88 years, respectively. Tongue, soft palate, hyoid position, and upper airway measurements were made on pre- and post-treatment lateral cephalograms and the differences between the mean measurements were tested using Wilcoxon signed-ranks test. Superior and middle airway space increased significantly (P < 0.05) in group 1. In group 2, none of the parameters showed a significant change, while in group 3, middle and inferior airway space decreased (P < 0.01). The findings show that extraction treatment using maximum anchorage has a reducing effect on the middle and inferior airway dimensions.
Department of Orthodontics, Faculties of Dentistry, Yeditepe University, Istanbul, Turkey.
Derya
D
Germec-Cakan
Tulin
T
Taner
Seden
S
Akan
D000293:Adolescent; D056151:Airway Remodeling; D002508:Cephalometry; D005260:Female; D006801:Humans; D008297:Male; D008311:Malocclusion, Angle Class I / Q000473:pathology / Q000628:therapy*; D008445:Maxillofacial Development; D009929:Organ Size; D052280:Orthodontic Anchorage Procedures; D009971:Orthodontics, Corrective / Q000379:methods*; D010347:Patient Care Planning; D010614:Pharynx / Q000033:anatomy & histology; D012137:Respiratory System / Q000033:anatomy & histology*; D018709:Statistics, Nonparametric; D014059:Tongue / Q000033:anatomy & histology; D014081:Tooth Extraction; D014609:Uvula / Q000033:anatomy & histology