Children’s tooth replacement sequence has a certain pattern, mostly according to the principle of “left and right symmetry, bottom first, then top”. Therefore, it is recommended that parents pay attention to children’s tooth replacement and visit the dentist regularly to ensure the growth of neat and healthy teeth. 1. 6-8 years old: Most children start to grow their first permanent teeth (incisors) during this period, replacing the milk incisors. The first molar, which is the penultimate posterior alveolar including the wisdom teeth, also slowly erupts independently; 2. 8-9 years old: most children begin to grow lateral incisors, which are the two teeth adjacent to the incisors, replacing the milk lateral incisors; 3. 10-12 years old: the cuspids and the first premolar begin to grow, replacing the milk cuspids and the first milk molar, which are adjacent to the lateral incisors and the first premolar is adjacent to the cuspids; 4. 12-13 years old: the second premolar begins to grow. Age 12-13: the second premolar and the second molar begin to grow, and the second premolar replaces the second molar, which is located between the first premolar and the first molar, and after the first molar; 5. Age 16-21: the last tooth to grow is the third molar, i.e., wisdom tooth, depending on the genetics, most of them will grow at the age of 16-21, but the specific growth time varies from person to person, and some people do not grow the third molar.