According to the American Association of Endodontists, root canals have a success rate of over 95%, and in most cases, they last a lifetime. The most important thing to do to make a root canal last as long as possible is to get the permanent restoration (fillings or crowns) on the tooth immediately following the root canal and maintain that restoration with impeccable hygiene. Practice good oral hygiene that means brushing and flossing at least three times a day, especially after meals and before bed.
Just because a tooth has had a root canal that does not mean the tooth is safe for as long as it remains in your mouth. That tooth can still get a cavity. Since there is no nerve in the tooth, a person will not feel any symptoms if the tooth gets a cavity. The tooth will only hurt if it gets fractured or gets another abscess around it. Thatís why it is important to get regular cleanings and checkups.