Introduction: Circadian rhythm is defined as the oscillations of biological variables at regular intervals of time. In mammals numerous clock genes have been described, whose function is to control all the circadian activity of those animals. We think that the progression of caries can be influenced by some circadian rhythms. The objective of this work is to review the circadian rhythms and establish which of them is the most influential in the formation of dental caries. Material and methods: A revision was made in Medline and Scielo medical databases, in order to select relevant information related to the object of this study. Results: they are in tables 1 and 2. Conclusion: Among the studied circadian rhythms, salivary is the one that has the most influence on the progression of caries.