Cephalometric Analysis of the Association Between Nasopharyngeal and Oropharyngeal Obstruction Sites and Lips and Perioral Soft Tissue Morphology in Children: A Cross‐Sectional Study

Nasopharyngeal obstruction was associated with upper lip thickening and eversion, while oropharyngeal obstruction corresponded to lower lip protrusion. These findings suggest that distinct obstruction sites are linked to specific perioral and maxillary morphological patterns, emphasising the importance of airway evaluation in orthodontic diagnosis and treatment planning.