A CBCT Study of Pharyngeal Airway Changes Due to Fixed Functional Appliances

<p>Introduction: The purpose of this retrospective study, using head and neck Cone-Beam Computed Tomography (CBCT) images, was to measure and compare volumetric, area, and linear changes of the pharyngeal airway space in patients treated with a MARA or Herbst Class II correction appliances. Materials and Methods: Twenty-six patients treated with a MARA (mean age 13.2), nine with a Herbst (mean age 12.12) , and a control group twenty-five orthodontically treated class I patients (mean age 13.11). T1 and T2 CBCT images were measured and compared between the three groups for area, length, and width measurements along the velo-, oro-, and hypopharyngeal airway as well as the overall volume. Results: The ANCOVA showed a significant decrease in the change of B length in the MARA and Herbst groups compared to the control group (P=.003). An additional ANCOVA taking gender, expansion, skeletal and dental classifications into account showed no significant changes in all the measurements in the treatment and control groups. Conclusions: The MARA and Herbst appliance did not show any significant changes in the overall volume, areas, or linear measurements along the pharyngeal airway.</p>

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Orthodontics and Dentofacial Orthopedics

Year

2016

Author dc:creator

• Peterson, Scott T.

Contributors dc:contributor

• Olson, Gregory
• Caruso, Joseph M.
• Farrage, James

• Dentistry
• Medicine and Health Sciences
• Orthodontics and Orthodontology
• Cone-beam Computed Tomography; Orthodontic Appliances - Functional; Pharynx;
• Pharyngeal Airway;

Statement dc:rights

• This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Language dc:language

English

Repository record dc:identifier

https://scholarsrepository.llu.edu/etd/404

OAI identifier oai:identifier

oai:scholarsrepository.llu.edu:etd-1399