One tooth got devitalized years ago and now it hurts, why?

One tooth got devitalized years ago and now it hurts, why?

In some cases a devitalized tooth can cause pain after a long time: this can be due to different pathologies (fractures, granulomas, cysts …).
When a devitalized tooth hurts, it is necessary to undergo a dental examination in which the dentist, through appropriate means (intraoral radiographs, orthopanoramic …), can evaluate the presence of any pathologies affecting the devitalized tooth and formulate the most appropriate treatment plan.