TNF and periodontitis: In this study, the salivary levels of caspase-1 and TNF-α were measured in a sample of Iraqi periodontitis patients and healthy-periodontium controls using an ELISA technique, and were then correlated with clinical parameters (full-mouth PI, full-mouth BOP, PPD, CAL, and GR indices) to diagnose periodontitis and to distinguish periodontitis patients from healthy controls.