The method of extracting teeth during pediatric tooth replacement is to take a preoperative whole mouth surface tomogram to observe the resorption of the roots of the milk teeth and the development of the embryo of the permanent teeth. If the root resorption is complete and only the gingiva is attached to the crown, the crown can be easily extracted by applying an anesthetic drug such as bupivacaine to the soft tissue surface. If chronic apical periapical inflammation occurs in the milk tooth and adhesions develop in the surrounding tissues, local infiltration anesthesia such as ativan is applied, and then extraction forceps are used to remove the retained milk tooth. Since the permanent tooth germ is close to the root bifurcation of the milk molar, care should be taken to avoid damaging the tooth germ, and if necessary, the crown of the milk molar can be divided into proximal-medial and distal-medial parts and extracted separately, and the alveolar fossa should not be scratched to avoid damaging the tooth germ.