Despite what many try to make you believe, only a small percentage of root canaled teeth are chronically infected. If a root canal is done improperly, it can get reinfected, and needs to be repiared, or the tooth extracted.

Sometimes people get pain or behaps the body tries to reject an implant. Getting an implant seems like a much more complicated proceedure than a root canal, and should be avoided, unless perhaps the alternative is having an empty space there or a bridge.