Preparing for root canal

Overview

A root canal is a dental procedure to save a tooth that is badly infected or decayed. The dentist removes the infected pulp (the soft tissue inside the tooth), cleans the space, and seals it to prevent further infection.

Yes, root canals are very common. Millions of people have them every year. They are a routine dental treatment.

Any child or adult with a permanent tooth that has deep decay, a crack, or an infection can need a root canal. It is most common in adults, but children with permanent teeth can also need one.

Symptoms

Common symptoms

• Severe tooth pain when chewing or biting
• Sensitivity to hot or cold that lasts even after the temperature is removed
• Swollen or tender gums near a specific tooth
• Darkening or discoloration of a tooth
• A small, pimple-like bump on the gums that may ooze pus

Symptoms in children

• Children with permanent teeth can have the same symptoms as adults. In baby (primary) teeth, a root canal (pulpectomy) may be done to save the tooth until it falls out naturally.
• A child might complain of tooth pain when eating or have sensitivity to sweets.

Symptoms in older adults

• Older adults may have less obvious pain because nerves in the tooth can shrink with age. They might notice a dull ache or a change in the tooth's colour.
• Symptoms can be masked by other dental work (like crowns or bridges).

Causes

Main causes

• Deep tooth decay (cavities) that reaches the pulp
• A crack or chip in the tooth that lets bacteria in
• Repeated dental procedures on the same tooth
• Trauma to the tooth (like a fall or sports injury) that damages the pulp even if there is no visible crack

Risk factors

• Not brushing and flossing regularly
• Eating a lot of sugary foods and drinks
• Not seeing a dentist for regular check‑ups
• Grinding or clenching your teeth (bruxism)
• Having a weakened immune system

When to see a doctor

See a doctor urgently if:

• If you have severe tooth pain that keeps you awake at night
• If you notice swelling in your face or gums near a tooth
• If you have a fever along with tooth pain

Book a routine appointment if:

• If you have ongoing tooth sensitivity that does not go away
• If a tooth has changed colour or feels different
• During a regular dental check‑up if your dentist spots an infection on an X‑ray

Diagnosis

Your dentist will examine your mouth, check for tender spots, and take X‑rays to see the condition of the tooth and the bone around it.

Tests that may be done

• X‑ray of the tooth and surrounding bone
• Tapping on the tooth to see if it is sensitive
• Testing the tooth's response to hot and cold temperatures
• Checking for a loose tooth or swollen gums

What to expect at your appointment

The dentist will explain what they see and discuss the best treatment. If a root canal is needed, they will talk you through the steps and answer any questions. You can ask about numbing options if you are worried about pain.

Treatment

Root canal treatment removes the infected pulp from inside the tooth, then cleans and seals the space. The tooth is then restored (usually with a crown) to protect it and allow normal chewing. The procedure is done with local anaesthetic so you should not feel pain. Sometimes a course of antibiotics is given before or after if there is an active infection.

Self-care at home

• Take over‑the‑counter pain relievers (like paracetamol or ibuprofen) as recommended on the label or by your dentist – always follow the directions.
• Avoid chewing on the side of the tooth until the final crown is placed and the tooth is fully healed.
• Rinse your mouth gently with warm salt water (a teaspoon of salt in a glass of warm water) to keep the area clean.
• Eat soft foods for a day or two after the procedure.

Medical treatments

Your dentist may prescribe antibiotics to treat an active infection before or after the root canal. They will also use a local anaesthetic to numb the area during the procedure. After the root canal, a temporary filling is placed, and later a permanent crown or other restoration is fitted to protect the tooth.

When is surgery considered?

In most cases, a root canal is a non‑surgical procedure. However, if the infection is severe or the tooth has unusual anatomy, your dentist or endodontist might recommend a minor surgical procedure called an apicoectomy (removing the tip of the tooth's root) to fully clean the area.

Living with this condition

After a root canal, you may have some soreness in the tooth and gums for a few days. This is normal and should get better with simple pain relief. Once the tooth is fully restored (with a crown), you can use it normally for chewing. Keep up with your regular oral hygiene – brush twice a day and floss daily.

Lifestyle tips

• Avoid biting hard foods (like nuts or ice) on the treated tooth until it has a permanent crown.
• If you grind your teeth at night, ask your dentist about a mouthguard to protect the tooth.
• Continue with regular dental check‑ups (every 6–12 months) so your dentist can monitor the tooth.

Diet and exercise

You can eat and drink as normal once the anaesthetic wears off. For the first day, choose softer foods like yogurt, soup, or mashed potatoes. Avoid very hot or cold foods if the tooth feels sensitive. There are no restrictions on exercise, but if you feel sore, take it easy.

Mental health and emotional wellbeing

Dental anxiety is very common. If you feel nervous about a root canal, talk to your dentist. Many dental practices offer relaxation techniques, sedation options, or simply a calm, reassuring environment. It is okay to ask for support – your comfort matters. If you feel very anxious or are avoiding dental care because of fear, consider speaking with a counsellor who specialises in dental anxiety.

Prevention

Many root canals can be prevented by taking good care of your teeth and gums. Good oral hygiene – brushing twice a day with fluoride toothpaste, flossing daily, and having regular dental check‑ups – helps keep cavities and infections away. Wearing a mouthguard during sports can also prevent tooth injuries.

Screening programmes

Regular dental check‑ups (every 6 to 12 months) allow your dentist to spot early signs of decay or infection. X‑rays can find problems before they become serious.

Complications

If left untreated

• The infection can spread to the bone around the tooth, causing an abscess (a pocket of pus).
• You may lose the tooth completely if the infection destroys the supporting bone.
• In rare cases, a severe infection can spread to other parts of the face, neck, or even the bloodstream, which can be life‑threatening.

Long-term outlook

With proper treatment, a root canal is very successful and can save a tooth for many years – often a lifetime. Most people have no problems after the tooth is restored. The procedure relieves pain and stops infection. Taking good care of your teeth after a root canal gives you the best chance of keeping your natural tooth.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.