Obstructive sleep apnea in association with periodontitis: a case-control study.

Purpose: Periodontitis is associated with several cardio-metabolic disorders that are co-morbid with sleep-disordered breathing. A relationship between periodontitis and obstructive sleep apnea (OSA) is plausible, but has received little attention. This study investigated the strength of association between periodontitis and risk for OSA.