“…Malformations of the maxilla, mandible, and associated structures can contribute to upper airway obstruction during sleep. Recently, studies using cephalometry and dental casts of patients with obstructive sleep apnea have shown an association with craniofacial morphological features such as a long and narrow face, transverse facial deficiency (high and narrow palatal arch), and retrognathia, in both adults (Hoekema et al , ; Johal and Conaghan, ; Riha et al , ; Nuckton et al , ; Okubo et al , ; Johal et al , ; Ishiguro et al , ; Lee et al , ; Gulati et al , ) and children (Marino et al , ; Pirila‐Parkkinen et al , , ; Tsuda et al , ; Ikavalko et al , ). In 6‐ to 8‐year‐old children, a recent study suggests that abnormal craniofacial morphology, more than excess body fat, increases the risk of obstructive sleep apnea (Ikavalko et al , ).…”