CHANGES IN UPPER AIRWAY DIMENSIONS IN EXTRACTION CASES OF CLASS II DIVISION 1 MALOCCLUSION WITH BIMAXILLARY PROTRUSION

Arbab Anjum; Aditi Gaur; Arina Arif; Mohd Tariq

Arbab Anjum Dept. of Orthodontics, Dr. Z. A. Dental College, AMU, Aligarh.
Aditi Gaur Private Practitioner, Mumbai
Arina Arif Dept. of Conservative Dentistry, K. D. Dental College, Mathura
Mohd Tariq Dept. of Orthodontics, Dr. Z. A. Dental College, AMU, Aligarh.

Keywords: upper airway area, lower airway area, premolar extractions

Abstract

Aims: To evaluate the changes in upper airway after first premolar extractions in Class II division 1 patients.
Methods and Material: Pretreatment and Post treatment lateral cephalograms of 20 Class II division 1(ANB =5°, FMA = 31°) patients were used in the present study. Patients were treated by extraction of all four first premolars. Airway dimensions were evaluated using lateral cephalograms. A paired t-test was used to analyse the data and observe the difference between the subjects.

Statistical analysis used: paired t-test
Results: The mean change in the upper incisor position at the end of the treatment was 6.3+4.3mm which was statistically significant. The change in lower incisor position was 1.05mm, however, the change was not statistically significant. There was a statistically significant change in maxillary incisor angulation with a mean change of 1.4 degrees. The mean change in lower incisor angulation was 4.3 degrees which was statistically significant. The mean difference of upper airway area between pretreatment and post-treatment was 1.13mm² and for lower airway was 0.015mm². both values were statistically insignificant

Conclusions: All four first premolar extractions did not affect the airway dimensions.