The order of teething in babies is milk incisors first, first milk molar, milk cusp teeth, and second milk molar. 1. The eruption of milk incisors: generally babies start to erupt lower milk incisors at the age of 4~6 months, upper milk incisors at about 7 months, mandibular lateral incisors at about 8 months, and maxillary milk lateral incisors at about 9 months. 2. Molar eruption: the mandibular first molar and maxillary first molar erupt in about one and a half weeks, generally the mandibular first molar is slightly earlier than the maxillary first molar. 3. Cuspid eruption: cuspid teeth erupt around one week old, mandibular cuspid teeth are slightly earlier than maxillary cuspid teeth. 4. Emergence of the second milk teeth: Generally, the second milk molar erupts at the age of 2~2.5 years, and again, the lower teeth are slightly earlier than the upper teeth. Due to individual differences, the order and time of eruption may vary to some extent. If there are any abnormalities in the eruption of teeth, it is recommended to consult a doctor in time for examination.