Eighteen years old incisors knocked out to do a few full ceramic teeth need to assess the state of the teeth, through the clinical examination and X-rays to confirm that there is no damage to the other teeth, and then treat the teeth to be assessed. 1. Trauma to the anterior teeth may damage the neighboring teeth, according to the X-ray film and clinical manifestations, check the damage to the teeth, the teeth were impacted by external loosening of the teeth, should be fixed with a splint and adjusted to observe the teeth, there is no pulpal inflammation and there is no tooth loss of the teeth, you can continue to use the teeth without the need to make all-ceramic dental crowns. 2. If the tooth is fractured and has pulpal inflammation but can still be retained, it is necessary to make crowns after root canal treatment and wait for the inflammation to be eliminated. If the tooth can not be retained need to be extracted, to be healed after the use of neighboring teeth at both ends of the abutment to make a fixed bridge, at this time it is necessary to do three all-ceramic crowns, if the abutment is not in good condition, you need to add another crown, you can also choose a dental implant. Specifically consult a professional physician’s opinion.