Generally speaking, when children reach 2.5 years old and all 20 milk teeth erupt, you can start teaching them to brush their teeth; around 3 years old, they should develop the habit of brushing their teeth in the morning and evening and rinsing their mouth after meals. When teaching your baby to brush, pay attention to reminding him/her to clean the 3 tooth surfaces: the inner measuring surface, the outer side and the horizontal chewing surface. Pay special attention to clean the posterior molar (lingual side) and the superior molar (buccal side), because these are the areas that babies are most likely to miss when they brush their teeth. How to effectively prevent and control tooth decay? Tooth decay in young children is usually caused by unhygienic oral cavity. The reason is nothing but food residue left in the mouth, mixed with bacteria, forming a film adhering to the mouth, forming plaque, which will decalcify the teeth after a long stay and slowly lead to tooth decay. The 20 common dental problems of children: tooth decay, yellow teeth, bad breath, bottle caries, jaw deformity, overcrowding, delayed loss of milk teeth, wedge-shaped defect, enamel hypoplasia, heavy tooth wear, hidden tooth fracture, current stimulated toothache, gum recession, pulpitis, pulp stone, periapical periodontitis, traumatic periapical periodontitis, alveolar abscess, tetracycline teeth, and sulcus closure. What is good for children’s teething? There are 3 types of things that children should not eat during teething, namely tetracycline, water and sweets with too much fluoride, and carbonated drinks. The timing of a child’s teething varies from person to person, but invariably teething is uncomfortable with an itchy tooth bed, so what is good for your child to eat at this stage? Semi-solid foods. For example, mashed potatoes, mashed egg yolks, cereal porridge, etc. Let your child experience the transition from a watery diet to a paste-like diet. A slightly thicker complementary food will make your child aware that his food is starting to change and will provide a foundation for adding solid foods later on so that your baby can practice chewing with his teeth. Foods with high nutritional value. Pureed meat, minced meat, tomatoes, tofu, steamed eggs, vegetables, etc. Normal, slightly soft foods. Rice, noodles, soybeans, etc. Add hard foods when the incisors and posterior molars have erupted. You can add some celery, corn, apples and other foods to make the tooth replacement smooth and give your child a healthy and neat teeth. Timely addition of foods from the milk. Examples include “paste” foods such as rice flour, wheat paste, mashed potatoes, mashed fruits, egg yolks, and teething cookies. This will not only help to relieve teething pain, exercise gnawing and chewing ability, strengthen jaw and facial muscles, and speed up the eruption of milk teeth, but also help to increase satiety and meet the nutritional needs of the child at this stage.