Do You Need a Root Canal?
Infected nerves or pulp can cause an abscess if left untreated. There are a number of symptoms which could be indicators that you need a root canal. You may need one if:

A root canal is a dental procedure that involves removing the infected nerve or inflamed pulp inside a tooth. A dentist or endodontist removes the pulp, which goes from the crown of your tooth to the roots, then cleans and fills the inside canal space. You need tooth pulp when your teeth were developing, but mature teeth can survive without pulp.
What the Root Canal Procedure Involves
The dentist or endodontist who works on your tooth will go through a careful, surgical procedure. After x-raying the tooth, the dentist will numb the tooth with anesthetic and then isolate it to keep it clean.
We will then use instruments to open the crown of the tooth and clean out any damaged pulp. There is pulp both in the area called the pulp chamber and lower down in the canals of your tooth’s roots.
The dentist will clean and shape the space and then fill it up with a rubbery material and adhesive to seal the roots. You will probably receive a temporary filling and then go back for another appointment in which your tooth can be crowned. Sometimes a tooth needs extra help and a dentist will insert a post inside the tooth to support the tooth restoration work you’ve had done.
Saving your tooth through root canal will relieve toothache, restore your ability to chew and help you to keep your natural smile.

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Root Canal – Frequently Asked Questions
Generally if you continue to feel sensitivity or pain past a few days, you should call your dentist.
All of these symptoms show after the tooth becomes damaged, or an infection develops on the pulp of the tooth.
Root canals are done to save the damaged pulp to allow you to keep your natural tooth.
It is used to refill the tooth in the process of the root canal reconstruction.