The tooth pain after root canal treatment should be examined in the hospital to see if it is caused by a missed root canal or apical cyst, etc., and consideration should be given to re-root canal treatment or apical surgery.
1. Re-root canal treatment: After an oral CT examination in the hospital, if it is determined that the pain is caused by a missing root canal or a poorly filled root canal, it is necessary to open the root canal and carry out a complete root canal treatment again.
2. Apical Surgery: If it is confirmed that the root canal treatment is complete, but the pain is caused by an apical cyst, then apical surgery should be considered to remove the cyst according to the size of the cyst.
Toothache after root canal treatment may also be a temporary pain caused by instrument or drug stimulation, the specific treatment measures need to go to the hospital to check the condition of the tooth to determine.