You’ve already had a root canal treatment, but that same tooth is giving you problems again. This time, solution to your problem is an apicoectomy
An apicoectomy, also known as root end surgery, might be necessary if an infection develops or continues after a root canal. If this is suggested for you, it means your tooth cannot be saved by conventional root canal treatment. Often, the only alternative to an apicoectomy is removing the tooth, which could affect adjacent teeth that are healthy. The purpose is to preserve the function of your natural tooth.