The Association of Periodontitis with Circadian Rhythm Disorders and Sleep—A Scoping Review

: Circadian rhythm alterations and poor sleep are related to periodontitis. A causal relationship between circadian rhythm disturbances, poor sleep, and periodontitis remains unclear, especially because of the cross-sectional design of most studies. No study has conducted an analysis of the reverse causality. To clarify this correlation, longitudinal studies should be conducted. A few experiments suggested that circadian rhythm disturbances and sleep deprivation induce periodontitis. Assessing direct causality and understanding the precise role of circadian rhythm alterations and sleep quality on periodontitis can lead to personalizing the management of the condition.