The extraction of supernumerary teeth in 13 year old children is not harmful to the human body, and the non-extraction of supernumerary teeth can lead to malocclusion or jawbone cysts, etc. The early extraction of supernumerary teeth can help restore the normal occlusal function of the child’s teeth. Extra teeth are extra teeth other than the normal number of teeth in the mouth (28~32 teeth), most commonly found in the maxillary anterior region, which may erupt into the mouth or remain buried in the jawbone without erupting. The eruption of supernumerary teeth into the mouth can lead to malocclusion and caries if food gets trapped between the supernumerary teeth and the normal teeth, so they need to be extracted as soon as possible. Since multiple teeth can often lead to malocclusion, a bad bite can occur, and removing them can help restore the normal bite function of the teeth. The buried supernumerary teeth that cannot erupt in the jawbone may lead to cysts in the jawbone and cause resorption of the neighboring roots, pain and deformity of the patient’s jaw and face, and therefore need to be extracted as soon as possible. If a child of 13 years of age develops supernumerary teeth, it is important to seek medical attention as soon as possible and follow the doctor’s instructions for treatment.