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. 2019 Jan-Mar;9(1):51-56.
doi: 10.1016/j.jobcr.2018.09.004. Epub 2018 Sep 13.

Cephalometric appraisal of the effects of orthodontic treatment on total airway dimensions in adolescents

Maj Raj Kumar Maurya  1 , Col Prasanna Kumar  2 , Lt Col Mohit Sharma  2 , Lt Col Karan Nehra  1 , Harpreet Singh  3 , Prabhat Kumar Chaudhari  4
Affiliations

Cephalometric appraisal of the effects of orthodontic treatment on total airway dimensions in adolescents

Maj Raj Kumar Maurya et al. J Oral Biol Craniofac Res. 2019 Jan-Mar.

Abstract

Aim: This retrospective study was performed to rule out any jeopardizing effect of extraction therapy of four first premolars on airway at any level of its anatomic course.

Materials and methods: Lateral cephalograms of 50 adolescent patients divided into two groups of 25 each, based on orthodontic treatment by first premolar extraction as group I and without extraction as group II, were selected for the study. 13 angular and 11 linear measurements were compared pre-and post-treatment via statistical analyses using SPSS (Version 17.5, SPSS, Chicago) software. Paired 't' tests were used to assess the variability. P-value < 0.05 was considered to be statistically significant.

Results: Comparison of angular parameters showed that the average percentage (%) change in SNA, SNB, ANB, IMPA, FMA, saddle, articulare, gonial, total angle and hyoid did not differ significantly across two study groups (P > 0.05), but values of UI/LI, UI/NA, LI/NB, differed significantly among both groups. Similarly, linear parameters showed that the average % change in nasopharyngeal airway space (NAS) and width of soft palate differed significantly across two study groups (P-value<0.05), whereas the average % change in posterior airway space (PAS), hypopharyngeal airway space (HAS), hyoid distance and length of tongue did not differ significantly (P-value>0.05). However, no significant differences were observed during intragroup and intergroup comparisons of the combined angular and linear measurements of both groups.

Conclusions: Present study showed no significant change on airway after therapeutic orthodontic tooth movement with or without extraction treatment.

Keywords: Airway; Hyoid bone; Premolar extraction; Tongue.

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Figures

Fig. 1
Fig. 1
Cephalometric tracing showing different points and landmarks used in the study.
Fig. 2
Fig. 2
Cephalometric tracing showing different parameters assessed in the study.
See this image and copyright information in PMC

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