Impact of Obstructive Sleep Apnea on Masticatory Muscle Function

Area of Science:

• Dental Practice
• Sleep Medicine
• Neuromuscular Function

Background:

• Obstructive sleep apnea (OSA) is a prevalent condition characterized by repeated episodes of upper airway collapse during sleep.
• Emerging evidence suggests a link between OSA and neuromuscular alterations, but its specific impact on masticatory muscles requires further investigation.
• The apnea-hypopnea index (AHI) is a key metric for quantifying OSA severity.

Purpose of the Study:

• To investigate the functional impact of obstructive sleep apnea on the masticatory muscles.
• To explore potential correlations between OSA severity and masticatory muscle performance.
• To assess the relationship between OSA, temporomandibular joint (TMJ) status, and metabolic conditions like diabetes.

Main Methods:

• Evaluation of masticatory muscle function using electromyography (EMG) and bite force measurements.
• Assessment of OSA severity through the apnea-hypopnea index (AHI) and polysomnography.
• Clinical examination of the temporomandibular joint (TMJ) and assessment of diabetes status.

Main Results:

• Patients with obstructive sleep apnea demonstrated significant alterations in masticatory muscle activity and reduced bite force compared to controls.
• A positive correlation was observed between higher apnea-hypopnea index (AHI) values and impaired masticatory muscle function.
• Temporomandibular joint (TMJ) symptoms and signs were more prevalent in individuals with moderate to severe OSA.

Conclusions:

• Obstructive sleep apnea negatively affects masticatory muscle function, potentially contributing to temporomandibular joint (TMJ) disorders.
• The findings highlight the systemic impact of OSA, extending beyond respiratory disturbances to orofacial motor control.
• Further research is warranted to elucidate the mechanisms linking OSA, masticatory dysfunction, and comorbidities such as diabetes.