For people who have H. pylori infection, H. pylori may be present inside the dental calculus. If H. pylori infection is not treated in time, H. pylori may be present in the plaque of the mouth and eventually form dental calculus. If H. pylori infection occurs, the mouth should be cleaned in a timely manner, and the calculus can be removed by ultrasonic scaling. Helicobacter pylori is mainly stored in the human stomach, the reproduction speed of this bacterium is relatively fast, if infected with this bacterium, it is harmful to the human body, Helicobacter pylori can disrupt the balance of gastric mucosal cell proliferation and apoptosis, which may lead to diseases such as atrophic gastritis, and may also increase the risk of cancer. Helicobacter pylori is contagious, if you are infected, you should go to the hospital in time, under the guidance of the doctor for treatment.