Dental abfractions are non-carious lesions that can complicate their diagnosis and correct treatment due to their characteristics. Objective: A literature review to analyze the etiopathogenic factors, clinical aspect, diagnosis, and treatment of dental abfractions. Methodology: A compilation of articles published in the last 5 years 2017-2022 was carried out using the PubMed electronic database. Abstracts and full texts were identified that included information on the etiopathogenesis, clinical aspect, diagnostic, and treatment. The implementation of the search using operators AND, OR, and NOT. Within the keywords used for the search "abfraction" "etiopathogenesis", "clinical aspect", "diagnostic" and "treatment". Results: Abfractions have a multifactorial origin (diet, mechanical action) which is more associated with occlusal forces. Most abfractions have a cervical crescent shape. Diagnosis depends on knowledge of the etiology, clinical aspect, and clinical history. The difficulty of treatment depends more on the difficulty of having a good marginal seal. Conclusions: According to the literature analyzed, the etiology of the affricative process is the product of inadequately distributed occlusal forces, which are concentrated in the cervical area. The therapeutics of these lesions can range from conservative treatments such as abrasives. However, more studies are needed to see the durability of this type of restoration. Therefore, education is important to avoid this type of injury.

The dilution of the quantity or quality of saliva is associated with complications that increase suffering and lead to many diseases. Objective: To analyze the literature on xerostomia, as well as its etiology, diagnosis, prevalence, and treatment. Methodology: A compilation of articles published in the last 5 years was carried out using the PubM ed electronic database. Abstracts and full texts that included information on cracked toot h syndrome: "xerostomia", "etiology", "diagnosis", "prevalence" and "treatment" were identified. Results: Knowing the etiology allows the dentist to detect it in time, thus avoiding the propagation of cracks and complications associated with it. Early diagnosis can be a simple restoration, if it progresses, root canal treatment and restoration are often necessary for cusp coverage. The number of cases has increased due to the little information on early diagnosis. The affected tooth's treatment and prognosis are generally difficult to determine. It depends more on the location, extension, and magnitude of the damage caused by the fissure when diagnosed and by the time of treatment. Conclusions: Xerostomia is of multifactorial and irreversible origin, among the factors that can cause it are the use of medications, radiotherapy, Sjögren's syndrome, diabetes, depression, anemia, bulimia, genetic disorders, alcoholism, smokers, and drug addicts. Diagnostic methods include questionnaires, gum tests, and computed tomography. Prevalent in adults and women. The use of salivary substitutes is the most frequent.