If the cavity is shallow, then consider filling; if the cavity is deeper, even to the extent of injuring the pulp, then consider extraction. 1. Shallow cavities: The six-year-old teeth are usually the first permanent molars, or first molars, that grow in children, and each person usually has one on the top, one on the bottom, and one on the right and one on the left. They play a very important role in the chewing function, and no teeth will grow after the teeth are missing. Therefore, if it is not necessary, it is recommended not to extract the six-year-old teeth, and usually recommend filling treatment. 2. Deeper cavities: If a six-year-old tooth has resulted in severe root caries and cannot be repaired, or if the root is damaged due to other reasons and cannot be retained, it can be extracted. However, after extraction of the six-age teeth, they must be restored with a denture to maintain the patient’s chewing function. It is recommended that patients who have all of their six-year-old teeth rotted should visit their dentist in a timely manner so that the doctor can analyze the tooth to see if it can be extracted.