Relationship of Pharyngeal Airway Length to Skeletal Class
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Abstract
Introduction: The study of the airways in orthodontics is essential because the respiratory function interferes with the proper development of the structures that form the craniofacial complex. Obstructions of the nasal passage favor functional imbalance and can even cause the development of malocclusions. Objective: To determine the association between the anteroposterior length (APL) of the upper (UP) and lower (LP) pharynx with skeletal class (SC), and with maxillary and mandibular length. Material and Methods: The study was carried out in the Orthodontics clinic of the Universidad Autónoma "Benito Juárez" of Oaxaca. Sixty lateral head radiographs of people aged 18 to 40 years without previous orthodontic treatment were analyzed; they were divided into groups based on SC. Results: 30 people with SCI and 30 with SCII were identified. It was observed that the APL of the LP is greater in the SCI than in the SCII (11.8 ± 2.9 mm vs. 10.0 ± 2.4 mm; p=0.007), the APL of the LP correlates weakly with mandibular length (p <0.001, r = 0.44) and the APL of the LP is greater in men than in women (12.1 ± 3.0 mm vs. 10.0 ± 2.3 mm; p= 0.003). Conclusion: the APL of the LP is greater in the SCI than in the SCII and greater in men than in women; furthermore, APL correlates with mandibular length.
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References
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