The ways to maintain the teeth of infants and young children include oral cleaning and care, healthy diet, regular checkups, and supplementation of calcium and trace elements. 1. Oral cleaning and care: Parents should pay attention to the oral care of infants and young children, you can use soft gauze dipped in saline to clean all surfaces of the baby’s teeth and the oral cavity, and when infants and young children two to three years old teeth, gradually teach infants and young children to brush their own teeth, and the application of special toothbrushes for infants and young children and toothpaste, etc., to ensure that the use of safety. 2. Healthy diet: After infants and toddlers can add complementary foods, parents should help infants and toddlers to develop healthy eating habits, avoid eating sweet and greasy foods, avoid eating foods that are damaging to the teeth, such as sugar, chocolate, etc., and maintain a light diet, which will help to maintain the teeth. 3. Regular checkups and supplementation of calcium and trace elements: Parents should regularly check the calcium content and trace element status of infants and young children, and give timely and symptomatic supplementation for deficiencies, such as calcium gluconate oral solution. Remember to strictly follow the doctor’s instructions to ensure the safety of supplementation. Parents are advised to strengthen the care of infants and children during teething, ensure sufficient sleep, and find abnormalities in time to avoid delaying the condition.