The characteristics of dental occlusion in patients with moderate to severe obstructive sleep apnea in Saudi Arabia.

Objectives: To evaluate characteristics of dental occlusion among non-obese Saudi adult patients suffering from moderate to severe obstructive sleep apnea(OSA).

Methods: Following ethical approval, a cross-sectional study was conducted at Sleep Disorders Center, King Khalid University Hospital, Riyadh, Kingdom of Saudi Arabia, between January and March 2017. Non-obese adult Saudi patients with moderate/severe OSA (apnea-hypopnea index more than 15) and without history of malocclusion or edentulism were included with an estimated sample size of 50.