The baby’s teeth begin to develop as early as 6 weeks of the mother’s pregnancy. Although there are no teeth in the newborn’s mouth, the crowns of the 20 baby teeth in the jawbone are partially calcified, in addition to the inherited permanent tooth germ. The enamel of the occlusal surface of the first permanent molar has also calcified. Therefore, the oral health care of the baby should start from the mother’s pregnancy. Controlling the mother-to-child transmission of caries-causing bacteria is the key link to prevent dental disease in babies: 1. enhance the oral hygiene of pregnant women to reduce the number of caries-causing bacteria; 2. promptly fill the untreated caries in the middle of pregnancy; 3. chew xylitol gum; 4. avoid touching the baby’s pacifier and meal spoon with the mouth. Good feeding habits: a) Pay attention to the feeding position, preferably holding and rotating the baby’s left and right feeds to avoid affecting the baby’s jaw and face development; b) Feed the baby some warm boiled water after breastfeeding to rinse the mouth; c) d) Don’t let the baby develop the habit of sleeping with a pacifier or comfort pacifier, feed only some plain water before bedtime, and clean all tooth surfaces of the teeth after each feeding to In order to avoid serious caries of the upper front teeth, which is medically called “bottle caries”, the whole crown can be destroyed in serious cases, affecting the beauty and normal chewing and pronunciation functions; e) It is better to feed water to infants and toddlers with cups, and use less or no sugary drinks; f) Stop using bottles after 1 year old. From 4 to 6 months of age, babies should be given a variety of semi-solid foods to meet their nutritional needs on the one hand, and to develop their chewing function on the other. 2. cultivate good eating habits for infants and toddlers a) limit the amount and frequency of eating sweets; b) avoid eating before bedtime; c) snacks are best eaten at the same time as meals. 3. Establish early oral hygiene habits: a) use gauze or cotton swabs before the baby’s teeth erupt; b) use a finger brush to help the baby brush after the baby’s teeth erupt; c) use a toddler brush to help the baby brush before the age of 3; d) supervise the baby’s brushing after the age of 3. Regular oral check-ups: The first oral check-up will be conducted at 6 months or 1 week of age, and every 6 months thereafter.