Tartar is formed due to poor oral hygiene and mineral deposits. Tartar is usually called dental calculus. 1. Poor oral hygiene: Usually, if you don’t brush your teeth on time or don’t rinse your mouth after a meal to clean up food debris, the food debris accumulates between the teeth and gums, and calcifies to form calculus after a long period of time. 2. Mineral precipitation: usually because saliva is a buffer, containing calcium, phosphorus and other ions that promote calcification, so that a variety of minerals deposited on the surface of the teeth and gums, and not removed in time, a long period of time will form dental calculus. In daily life, patients should pay attention to oral hygiene, diligent brushing, patients are advised to go to the hospital for examination, under the guidance of the doctor reasonable use of medicines, at the same time should be rinsed after meals, to maintain the habit of brushing every day, eat more vegetables and fruits.