The bone shows a sharp point after tooth extraction, which may be a sharp alveolar ridge or residual tooth fragments. 1. Sharp alveolar ridge: For some multi-rooted teeth or the alveolar bone of elderly patients, the bone is uneven, and if you don’t pay attention to cleaning the alveolar fossa and trimming the bone after tooth extraction, it is easy to form a sharp tip of the bone, which affects the diet and restoration. Alveolar bone trimming is needed to smooth the sharp bone tips. 2. Residual tooth fragments: For some residual crowns and residual roots extraction, they are easy to fragment, and if they are not careful after the operation, it will lead to the fragments missing and protruding from the mucosa to form a sharp tip. It needs to be extracted again. It is recommended to go to the regular hospital stomatology department for consultation and consultation, and be examined by the physician for a clear diagnosis and symptomatic treatment.