Usually it lasts for a decade or lifetime.
No single tooth is identical.
It is very difficult to say how long it will last, but few factors we do take into consideration like the severity of the infection before the start of the root canal treatment as well as the total tooth structure that was present, it depends on the skill of the dentist or the endodontist who performs the root canal treatment.
If he has been successful in reducing the infection in the apical region of the tooth as well as the adjacent bone, the tooth, then restored using a prosthesis should last for a lifetime but it is very tough to say what is the longevity of the tooth after the treatment.
► See also: ENDODONTICS : Root canal treatment - Step by Step
Fuente: Youtube / Doctors' Circle - World's Largest Health Platform