What actually happens during a root canal?

Why the pulp has to come out

The pulp is the soft tissue at the center of a tooth. It can become inflamed or infected after a deep cavity, repeated procedures on the same tooth, a crack or fracture, or an injury, even one that leaves no visible chip. Left untreated, the bacteria can damage the supporting bone and cost you the tooth. Root canal treatment removes the damaged tissue so the tooth itself can stay.

The steps, in order

The visit starts with an exam and an x-ray, then a local anesthetic to numb the tooth. A dental dam, a thin rubber sheet fitted around the tooth, keeps it dry and free of saliva throughout. A small opening is made through the top of the tooth to reach the pulp chamber.

Fine instruments remove the pulp from the chamber and each canal, then shape the canals so they can be filled. The space is cleaned and disinfected, sometimes with germ-killing medicine, before the canals are packed with gutta-percha and cement to seal them. A temporary filling closes the opening until the tooth is restored.

Each appointment lasts roughly 60 to 90 minutes. Your general dentist may do the work or refer you to an endodontist, one of the dental specialties focused on the pulp. For anxious patients, nitrous oxide is an option.

What it feels like, during and after

Because the tooth is numb, you may notice pressure or movement but should not feel pain, and most patients say it feels similar to a routine filling. The ache that brought you in usually comes from the inflamed or infected pulp, so removing that tissue is what brings relief.

Afterward the tooth may feel slightly sore for a few days, especially if it hurt beforehand, and symptoms usually ease within three to five days. Over-the-counter ibuprofen or acetaminophen is often enough. Severe or worsening pain should be checked. The first days are covered in the home care instructions.

Why a crown follows, and the limits

The temporary filling is later replaced with a permanent restoration. Molars and premolars take the heaviest chewing forces, so they generally need a crown to protect against fracture, while incisors and canines don’t always. If too little tooth remains, a post may be placed in the canal for support.

Success rates often exceed 90%, and with proper care a treated tooth can last a lifetime. Some teeth fail to heal as expected, and retreatment or endodontic surgery can often still save it. When the damage is too severe, removing the tooth and replacing it with an implant or bridge is the alternative.