Introduction: Cracked tooth syndrome is defined as an incomplete fracture initiated from the crown and extending cervically, and sometimes gingivally, and is usually directed mesiodistally. Objective: To analyze the literature about cracked tooth syndrome, its etiology, prevalence, pulp involvement and treatment. Methodology: Using the keywords "cracked tooth syndrome", "etiology", "prevalence", "pulp involvement" and "treatment", the MEDLINE/PubMed and ScienceDirect databases were searched, with emphasis on the last 5 years. It was evaluated with the PRISMA and AMSTAR-2 guidelines. Results: There are many causes for cracks, the main one being malocclusion. Another is due to restorations, pieces to which amalgam was placed due to the extension of the cavity for the retentions. The second lower molar presents more frequently fissures due to premature contact. Cracked teeth are a challenge for the dentist in the diagnosis since the discomfort is presented with different stimuli. Depending on the extent of the fissure, the treatment is decided, always keeping in mind that the prognosis is reserved. Conclusions: Cracked tooth syndrome will always be a challenge for the dentist at the time of diagnosis and treatment. There is no specific treatment, depending on the extent of the fissure is to decide the treatment to be performed.