IL6 and periapical periodontitis: Based on this evidence, this study aimed to verify the frequency of polymorphism in the -174G/C promoter region of the IL-6 gene and the +197 A/G region of the IL-17 gene in patients with asymptomatic periapical inflammatory lesions (APILs) - diagnosed with asymptomatic apical periodontitis (AAP) or chronic apical abscess (CAA) - and verify the existence of correlations between the area of the periapical lesion based on radiographic findings, with age, sex, diagnosis, and presence of the polymorphism, in the evaluated patients.