Abstract
Atypical dental anatomy or, more precisely, some morphological defects in the dental structure should be considered predisposing factors for the onset and progression of periodontal disease since they favor biofilm accumulation and may be related to the onset and progression of periodontal disease. This paper aims to analyze the prevalence of the cervical enamel projection (CEP) through a narrative review. We analyzed articles relating to cervical enamel projections published in Portuguese, English, or Spanish without restriction on the year of publication in databases such as EMBASE, Google Scholar, Scopus, PubMed, and Web of Science using the MESH descriptors "anatomy" and "cervical enamel projection". 134 studies were found; however, only 37 of these articles met all the inclusion criteria and were added to the complete qualitative analysis. The publications were made between the years 1964 and 2019, and in vitro studies (20), literature review (10), and clinical cases (7) were identified. The presence of cervical projection of enamel, both in upper and lower molars, is a frequent finding in all anatomical studies, with a prevalence observed in the literature of 5.86 to 85% in molar teeth.
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