A person has two sets of teeth in his life, namely deciduous teeth and permanent teeth. Generally, a set of deciduous teeth emerges 56 months after birth, with a small number of teeth, small size, and low chewing ability. It is not until about 6 years old that the teeth begin to be gradually replaced by a set of permanent teeth. All deciduous teeth have to work in the oral cavity for about 610 years before they complete their historical mission and gradually leave the oral cavity. To protect children's deciduous teeth, you should do the following: \x0d\ (1) Pay attention to oral hygiene, brush your teeth in the morning and evening, and rinse your mouth after meals to reduce the adhesion of harmful substances on the tooth surface and enhance the resistance of the teeth and gums. Do not eat snacks such as candies and biscuits before going to bed. \x0d\ (2) Don’t be picky about food, and eat more rough and fiber-containing foods, such as vegetable stems, sugar cane, etc., because these foods need to be fully chewed. Normal chewing function plays a physiological stimulating role in the development of chewing ability and the strengthening of craniofacial bones, making chewing more developed and the bone structure stronger. \x0d\ (3) Correct bad habits such as mouth breathing, finger biting, and pen holder biting. \x0d\ (4) Check regularly to detect and treat dental caries early. Children's dental disease should not be taken lightly. If the deciduous teeth are not well protected, it will be difficult to ensure the health of the permanent teeth. Some permanent teeth develop enamel dysplasia, which is caused by root-end lesions of deciduous teeth. Therefore, protecting teeth should start with deciduous teeth.