Three dimensional evaluation of pharyngeal airway changes associated with maxillary incisors proclination in class II division 2 using cone-beam computed tomography
Marzouk, E., EL Kalza, A. (2014). Three dimensional evaluation of pharyngeal airway changes associated with maxillary incisors proclination in class II division 2 using cone-beam computed tomography. EKB Journal Management System, 45(June 2014), 1-18. doi: 10.21608/eos.2014.78740
Eiman Marzouk; Ahmed EL Kalza. "Three dimensional evaluation of pharyngeal airway changes associated with maxillary incisors proclination in class II division 2 using cone-beam computed tomography". EKB Journal Management System, 45, June 2014, 2014, 1-18. doi: 10.21608/eos.2014.78740
Marzouk, E., EL Kalza, A. (2014). 'Three dimensional evaluation of pharyngeal airway changes associated with maxillary incisors proclination in class II division 2 using cone-beam computed tomography', EKB Journal Management System, 45(June 2014), pp. 1-18. doi: 10.21608/eos.2014.78740
Marzouk, E., EL Kalza, A. Three dimensional evaluation of pharyngeal airway changes associated with maxillary incisors proclination in class II division 2 using cone-beam computed tomography. EKB Journal Management System, 2014; 45(June 2014): 1-18. doi: 10.21608/eos.2014.78740

Three dimensional evaluation of pharyngeal airway changes associated with maxillary incisors proclination in class II division 2 using cone-beam computed tomography

Egyptian Orthodontic Journal
Article 1, Volume 45, June 2014, June 2014, Page 1-18  XML PDF (505.87 K)
Document Type: Original Article
DOI: 10.21608/eos.2014.78740
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Authors
Eiman Marzouk; Ahmed EL Kalza
Orthodontics Department, Faculty of Dentistry, Alexandria University, Egypt
Abstract
Objective: To evaluate whether the correction of the axial inclination of retroclined maxillary incisors in Class II division 2 cases might affect the pharyngeal airway size and volume using Cone-Beam Computed Tomography (CBCT) and the Invivo Dental software (Anatomage). Materials and Methods: Eighteen adult male Class II division 2 subjects were enrolled in this study (mean age 23.83 ± 3.67 years). Two CBCT scans were obtained for each subject; pretreatment and after completion of the maxillary arch leveling only. The pretreatment and post-leveling pharyngeal air way mean values (size and volume) were compared using the paired sample t-test. Results: The results showed statistically significant increase (P90.05) in all oropharyngeal airway measurements following maxillary dental arch leveling. There has been 9.53% ±1.45% raise in the oropharygeal airway volume. In addition the analyses of the pretreatment and post-leveling mandibular measurements revealed high statistically significant changes (P9 0.001) as follows: SNB angle increased, and FH-Mn Pl and Y axis-FH angles decreased, following the leveling of upper anteriors. Conclusion: The correction of the maxillary incisors inclination in Class II division 2 subjects improved the pharyngeal airway size and volume. This might be attributed to the anterior mandibular repositioning following the correction of upper incisors retroclination. These findings are of valuable clinical importance, especially in cases of Class II division 2 with breathing problems due to pharyngeal constrictions.
Keywords
Airway; Class II Division 2; CBCT
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