The presence of Helicobacter pylori in oral cavities of patients with leukoplakia and oral lichen planus.

Objective: Helicobacter pylori infection is one of the most common bacterial infections in men. This gastrointestinal pathogen is closely related to gastritis, peptic ulcers, and the increased risk of gastric cancer. Numerous studies have indicated oral cavities as possible Helicobacter pylori reservoirs.