Why is it necessary to devitalize a tooth even if it no longer hurts?

Why is it necessary to devitalize a tooth even if it no longer hurts?

Very deep cavities can lead to the loss of tooth vitality: in some cases it can be an acute painful event, in others the loss of vitality is progressive and the patient may not feel pain.
The dentist uses special diagnostic tools to check the vitality of the tooth (percussion test, sensitivity test to cold, intraoral radiographs …) and when a tooth is not vital it is necessary to carry out endodontic therapy (or root canal therapy, or devitalization) to remove necrotic tissue, disinfect the canals and seal them.
This procedure is carried out to reduce the bacterial load that can cause infections and ensure a longer life of the tooth.