When you consider root canal treatment is successful in a patient? after how long from starting treatment?

Root canal therapy: Due to the very long time it may take to notice symptoms appear after irreversible nerve damage, it can take a very long time for all the symptoms to dissipate . Look for a change; if its getting worse, see an endodontist, if it is getting better (by the week or month) , great. The body is very unique; we look for a change.

Root Canal: Generally a root canal is successful if on a one year post operative xray all supporting structures have healed and appear normal. More immediately if the patients symptoms have gone away and the tooth feels and acts normally the rct is a success.

No pain and function: A root canal treatment is considered successful if the tooth is asymptomatic [no pain] and has been able to be restored [filling or crown] to restore form and function.