Volume 2, Issue 3 (10-2013)                   3dj 2013, 2(3): 8-16 | Back to browse issues page


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Dadbin A, SalehiVaziri A, Basirat M, Shahriar S, Nouri Sari I. Three Dimensional Study of Upper Airway in Different Antero-posterior Jaw Relationships through Cone Beam Computed Tomography. 3dj. 2013; 2 (3) :8-16
URL: http://3dj.gums.ac.ir/article-1-54-en.html
1- Shahed School of Dentistry, Shahed University of Medical Sciences, Tehran, Iran
2- Department of Orthodontics, Shahed School of Dentistry, Shahed University of Medical Sciences, Tehran, Iran
3- Department of Oral Medicine, Rasht School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
4- Department of Oral & Maxillofacial Radiology, Shahed School of Dentistry, Shahed University of Medical Sciences,Tehran, Iran
5- Department of Orthodontics, Shahed School of Dentistry, Shahed University of Medical Sciences, Tehran, Iran
Abstract:   (9309 Views)

Introduction: This study aims at examining the difference of pharyngeal airways in patients with different occlusion postures, hoping to im‌prove diagnostic methods and provide a stable treatment plan for orthodontic patients.
Materials and Methods: The data were ga-thered through CBCT radiographies of patients from a specialized center for radiology. In each occlusion group according to the performed pilot study, 30 people (90 people in 3 groups of class I, II and III, male and female each) were chosen as the sample. The two-di‌mentional cephalometric radiographs were ob‌tained from 3D-radio-graphs, and the patients’ malocclusion postures were de‌termined according overjet and ANB angle, and finally grouped. Next, airway volume and di‌mensions were measured in cross sectional.
Results: Statistical studies showed there is a significant relationship between anteroposte-rior positions of mandible and the volume of pharyngeal airway. Also, the volume of pharyn-geal airway in class III patients is more than those of patients in class I. The volume of pha-ryngeal airway in class II patients is also less than those of class1 patients.
Conclusion: Pharyngeal airway in class III is larger and in class II smaller. Therefore, consi-dering this subject can lead to improving diag-nostic ways, especially orthognatic surgery treatments, and providing a stable treatment plan for patients who need orthodentic treat-ment

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Type of Study: Original article | Subject: Radiology
Received: 2013/12/30 | Accepted: 2013/12/30 | Published: 2013/12/30

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