The root canal procedure itself will remove the infected nerve tissues from inside your tooth. If left in place, the tooth will reabsorb and abscess, ultimately requiring an extraction.
After the chamber is cleaned and decontaminated, a filling material will be placed down into the hollow canals to prevent the risk of reinfection.
The remaining tooth structure will now be disease-free, but more brittle as it is no longer vital. Your dentist will place a protective ceramic crown over the tooth, allowing it to function normally without wearing down due to everyday use.