Cephalometric differences between patients with REM- and NREM-Predominant OSA: implications for selecting surgical...

Area of Science:

• Sleep Medicine
• Otolaryngology
• Medical Imaging

Background:

• Obstructive sleep apnea (OSA) is a prevalent sleep disorder characterized by recurrent upper airway collapse.
• Intermittent hypoxemia and sleep disruption are key consequences of OSA.
• Anatomical variations in the airway play a significant role in OSA occurrence and severity.

Purpose of the Study:

• To investigate the association between specific cephalometric anatomical features and polysomnographic (PSG) data in patients diagnosed with OSA.
• To identify cephalometric predictors for different subtypes of obstructive sleep apnea.

Main Methods:

• Retrospective cohort study of 74 patients with OSA, including cephalometric and panoramic radiography.
• Patients were classified into positional OSA (POSA), non-positional OSA (NPOSA), REM-related OSA, and NREM-related OSA based on PSG data.
• Statistical analyses included group comparisons and logistic regression to correlate cephalometric measurements with OSA subtypes and identify risk factors.

Main Results:

• No significant differences in cephalometric parameters were observed between POSA and NPOSA.
• NREM-related OSA patients exhibited longer N-ANS length, greater anterior hyoid-to-mandibular plane angle, and longer tongue length compared to REM-related OSA patients.
• Narrower nasal and maxillary widths, a posteriorly/inferiorly positioned hyoid bone, and longer tongue length were identified as significant risk factors for NPOSA and NREM OSA.

Conclusions:

• Cephalometric anatomical factors such as nasal width, maxillary width, hyoid bone position, and tongue length are significantly associated with OSA subtypes.
• These findings suggest that personalized treatment strategies for OSA, potentially including mandibular advancement devices (MAD), maxillomandibular advancement (MMA), genioglossus advancement, or transverse maxillary expansion, can be tailored based on individual anatomical characteristics.