Dentofacial changes following treatment with a fixed functional appliance and their three-dimensional effects on the upper airway

Abdalla, Yousef, Kiliaridis, Stavros, and Sonnesen, Liselotte (2021) Dentofacial changes following treatment with a fixed functional appliance and their three-dimensional effects on the upper airway. Australasian Orthodontic Journal, 37 (2). pp. 284-293.

[img]
Preview
PDF (Published Version) - Published Version
Available under License Creative Commons Attribution.

Download (576kB) | Preview
View at Publisher Website: https://doi.org/10.21307/aoj-2021.031
 
65


Abstract

Background: Proposed skeletal changes achieved by functional appliances (FA) with reference to stable structures (structural method) have received relatively little attention compared to conventional cephalometric measurements (conventional method). Using the two methods, the aims of this study were to (1) determine the skeletal changes as a result of FA treatment; and (2) identify the skeletal changes associated with upper-airway volume and minimum cross-sectional area (MCA). <br /><br /> Methods: Pre- and post-treatment CBCT scans were selected from 73 FA treated children (37 girls and 36 boys; mean age 12.0 years) and 73 children as a control group (matched for chronological age, skeletal age, gender, and mandibular inclination) who received orthodontic treatment using only fixed appliances (no FA). Skeletal, upper-airway volume, and MCA changes were analysed by applying both structural and conventional methods. <br /><br /> Results: The FA group had significant skeletal effects compared with the control group (both methods; p = 0.04 - p < 0.001). The horizontal displacement of pogonion (both methods) and the hyoid bone, together with a forward mandibular rotation (structural method), had positive effects on upper-airway volume and MCA (p < 0.05). <br /><br /> Conclusions: The horizontal changes in pogonion (both methods) and the hyoid bone, as well as a forward mandibular rotation (structural method), have a strong association with changes in the upper airway. The conventional method underestimates FA treatment effects. These results may influence the management of growing class II patients with compromised upper airways.

Item ID: 71390
Item Type: Article (Research - C1)
ISSN: 2207-7480
Copyright Information: © 2021 Author(s). This work is licensed under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/)
Date Deposited: 30 Jan 2022 21:38
FoR Codes: 42 HEALTH SCIENCES > 4299 Other health sciences > 429999 Other health sciences not elsewhere classified @ 100%
SEO Codes: 20 HEALTH > 2001 Clinical health > 200101 Diagnosis of human diseases and conditions @ 100%
Downloads: Total: 65
Last 12 Months: 49
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page