Teeth are one of the most important organs of the human body. It is an important organ for chewing, for pronunciation and for aesthetic coordination of the face. Therefore, everyone wants to have a set of neat, white and healthy teeth. If we don’t pay attention to oral hygiene and protect our teeth, we will have tooth decay, gingivitis, periodontitis, tooth pain, bleeding, loosening and even falling off. So, how to protect the dental health? (1) We should develop the habit of brushing teeth from childhood. Under normal circumstances, children should start brushing their teeth from the age of 2~3. Brushing is an important means to keep teeth and oral cavity clean, and it also has the function of massaging gums. The correct method of brushing teeth, suitable toothbrush, in order to achieve the purpose of cleaning the mouth. (2) To make full use of the chewing function of the teeth, so that not only chew fine food, and can stimulate saliva secretion, in addition to rinse clean teeth on the dirt, help to maintain dental health. Pay attention to chew slowly and eat coarse and hard food appropriately to help digestion, which can make teeth erupt smoothly and neatly. (3) From early childhood, correcting bad habits is also an important measure to protect teeth. Such as biting fingers, chewing hard objects, thumb sucking, tongue sticking out, lip biting, open mouth breathing, biting metal objects, pulling nails, biting walnuts, etc. (4) To develop the habit of not eating snacks before going to bed. (5) To achieve early prevention and regular inspection of oral health status. It is better to go to the dentist for oral health checkup in half a year to one year when you have not found any dental disease yet, and perform tartar cleaning on gingiva regularly to help prevent the occurrence of caries and periodontal disease.