Patient: My tooth was touched off half a few days ago and I want to fill it. Wang Yuhua, Department of Oral Plastic and Reconstructive Surgery, Hospital of Plastic Surgery, Chinese Academy of Medical Sciences: Fractured teeth are not uncommon in clinical practice, and the principles of treatment are different depending on the size, location and symptoms of the injury. (1) First, take a dental film of the injured tooth to see if the root is fractured. (2) The defect is limited to a little enamel and the dentin is not exposed, so the sharp edge will be blunted and the shape will be aesthetically restored. (3) The dentin has been exposed to mild sensitivity, can first desensitization treatment. If the sensitivity is more severe, desensitization + pulp capping can be performed, and then composite resin aesthetic restoration crown form. (4) If the pulp is exposed, pulp extraction and root canal treatment are feasible for adult permanent teeth; for young permanent teeth, live pulpotomy is performed and the root development is completed, while resin veneers are used to restore the crown form. (5) If all the teeth are broken, pile crown restoration can be done after root canal treatment; if the root tip is not yet formed, apical induction formation can be done to preserve the tooth papilla at the root tip for continued development of the root tip. Key points: 1, as far as possible to protect the pulp; not easily do porcelain teeth (all-porcelain teeth) 2, the effect of resin veneers is realistic, in addition to the choice of materials, the doctor’s skills are particularly important.