The topic of oral cavity is very common in life, such as “disease from the mouth”, “bright eyes and white teeth”, etc.. As the starting point of the human digestive tract, the mouth plays an important role in the process of digestion. Saliva secreted around the mouth and oral salivary glands is an important barrier of the human body, is a brick wall of defense against the invasion of external pathogenic microorganisms. Teeth, as the main organ in the mouth, enable people to enjoy delicious food. It is inconceivable that food that is not chewed by teeth can cause such great damage to people. The quality of human beings has been improving with the course of history, the mind is becoming more active, and the infinite wisdom and longevity are extended together, and teeth are to be credited. With the progress of human society, people’s demand for quality of life is increasing day by day, more and more people pay more attention to and care about oral health care, I will continue to promote the knowledge of oral health care and the content of oral disease diagnosis and treatment to provide a platform for the people.