In order to determine the pathogenesis of chronic inflammatory diseases, the levels of various cytokines are examined in tissues and fluids taken from the body. Recent publications have investigated the role of Interleukin-6 (IL-6), Interleukin-8 (IL-8) and LIGHT in chronic inflammatory diseases. The aim of this study was to evaluate the levels of these cytokines in the saliva of healthy individuals with gingivitis and periodontitis and to investigate whether they are reliable biomarkers for the diagnosis of periodontitis. In the current study, all oral clinical parameters of 60 systemically healthy individuals (20 healthy, 20 with gingivitis and 20 with periodontitis) who were admitted to the clinic for routine periodontal control will be measured and saliva samples will be taken from the patients. IL-6, IL-8 and LIGHT (biomarkers emphasizing inflammation in saliva samples) will be determined by enzyme-linked immunoassay (ELISA). Then, statistical analyses will be performed to interpret the difference in cytokine levels between the groups and the relationship between these cytokines and clinical parameters. Possible significant differences between cytokine levels will reveal that these proteins and enzymes can be utilized as a diagnostic tool in periodontal diseases, to distinguish periodontal disease status from healthy, or as a guide for treatments.