Inside every tooth is a soft core of nerve and blood vessels called the pulp. When decay, a crack, or an old injury lets bacteria reach that pulp, it becomes inflamed or infected, and the ache can be hard to ignore. A root canal removes the damaged tissue, disinfects the space left behind, and seals the tooth so you can keep it rather than lose it.
What is happening inside the tooth
Enamel is the hard outer shell, but the living part of a tooth sits in narrow channels that run from the crown down through each root. Bacteria reach those channels through a deep cavity, a fracture, a leaking filling, or a knock to the mouth. Once inside, the tissue swells with nowhere to expand, which is why the pain can feel deep and constant. Left alone, the infection can spread past the root tip into the surrounding bone and form an abscess.
Symptoms that bring people in
Not every infected tooth hurts, which is one reason regular checkups matter. When symptoms do show up, they tend to be specific rather than vague, and they are worth reporting even if they come and go.
- Sensitivity to hot or cold that lingers after the source is gone
- Sharp pain when you bite down or release
- A dull, throbbing ache that wakes you at night
- A pimple-like bump or sore on the gum near one tooth
- Swelling in the gum, cheek, or jaw
- A single tooth turning grey or darker than its neighbors
Confirming the diagnosis
Before recommending anything, Dr. Beaty examines the tooth, tests how it responds to temperature and pressure, and reviews digital x-ray images of the root and the bone around it. Those pictures show whether the infection has reached the tip of the root and how many canals the tooth has. Molars have more canals than front teeth, which is part of why treatment on a back tooth takes longer.
What the appointment is like
The area is numbed thoroughly first, and we check that you are comfortable before starting. A small opening is made in the top of the tooth, the inflamed tissue is cleaned out with fine instruments, and the canals are shaped, disinfected, and dried. A rubber-like material is then packed in to fill the space and keep bacteria from returning. Most people describe the visit as similar to having a filling placed, and the pressure that was causing the ache is usually gone by the time you leave. Tell us at any point if you need a break.
Rebuilding the tooth afterward
A treated tooth has lost its internal blood supply and becomes more brittle over time, so it needs proper coverage. Back teeth, which take the heaviest chewing load, are usually finished with a custom-made crown that caps the whole tooth. A front tooth may only need a bonded filling. We will explain which restoration suits your tooth and arrange the follow-up visit to complete it.
The first few days at home
Mild tenderness when biting is common for a few days while the ligament around the root settles down. Over-the-counter pain relievers usually handle it. Stick to softer foods and chew on the other side until the permanent restoration is in place, and keep brushing and flossing the area normally. Call us if swelling increases, the pain worsens instead of easing, or your bite feels high.
Weighing treatment against removal
The alternative to a root canal is removing the tooth entirely, which then leaves a gap that neighboring teeth can drift into. Replacing a missing tooth with an implant or bridge is a longer process than saving the one you have. That said, a tooth that is badly fractured or has lost too much structure may not be a good candidate, and we will be straightforward with you if that is the case. If a tooth is bothering you, schedule a visit rather than waiting to see whether it settles on its own.
Common questions about root canal therapy
Does a root canal hurt?
The tooth is numbed with local anesthetic before treatment begins, so the procedure itself feels much like having a filling placed. Most of the discomfort people associate with root canals comes from the infection beforehand, not the treatment. Afterward the tooth is often tender for a few days, which over-the-counter pain relievers generally manage well.
How many appointments does a root canal take?
Many teeth can be treated in a single visit, though a molar with several canals or a tooth with active swelling may need two. You will also need a separate appointment to place the permanent crown or filling that protects the tooth afterward. Dr. Beaty can give you a realistic plan once she has examined the tooth and reviewed the x-ray.
Can I just have the tooth pulled instead?
You can, but removing a tooth creates a space that affects chewing and lets nearby teeth shift. Replacing it with an implant or bridge involves more appointments and healing time than treating the tooth you already have. Extraction makes sense when a tooth is fractured below the gumline or too little healthy structure remains to rebuild.
How long can I wait if the pain goes away on its own?
Pain that stops is not a sign the problem resolved. It often means the nerve inside has died, while the bacteria remain and continue spreading toward the bone. An abscess can develop quietly and become an urgent problem later. If you have had unexplained tooth pain, it is worth having the tooth checked even after it stops aching.
