Review question / Objective: Is gastric helicobacter pylori infection related to periodontal diseases? Condition being studied: Therefore, the aim of this systematic review and meta-analysis was to identify and analyze clinical studies to determine the direct correlation between Helicobacter Pylori gastric infection andPeriodontal Disease. Study designs to be included: Clinical studies that provided data on Helicobacter Pylori infection in both the stomach and oral cavity, confirmed by polymerase chain reaction (PCR), rapid urease test (RUT) or enzyme-linked immunosorbent assay (ELISA). Clinical studies that associated PD with Helicobacter Pylori. The diagnosis of PD was confirmed ac-cording to the diagnostic criteria in periodontology.