Porcelain crowns with incisor roots still present generally do not require a joint bridge fixation. In cases where the roots of the incisors are still present and can still support a porcelain crown, there is usually no need for a neighboring tooth to be restored with a joint crown. This is because natural teeth need to be prepared whenever crown restorations are performed. Therefore, if it is not necessary, we usually try not to do joint crown restorations if we can. If the roots of the incisors are still there, but can not support the porcelain crown, the patient is not ready to extract can be fixed with a bridge to retain the teeth, but may increase the occlusal burden on the neighboring teeth, crown restoration is also prone to loosening. In the case of incisor roots are still in the case of porcelain teeth to do bridge fixation, it is recommended to consult a professional doctor, under the guidance of the doctor to give targeted treatment or treatment.