Root Canal & Cavity Treatment in Korea — The Complete Guide to Schedule and Travel Dental Emergencies for International Patients

What is a root canal — treating the inflamed nerve inside a tooth so you can keep your natural tooth

When a cavity deepens or a tooth cracks and bacteria reach the nerve inside the tooth (the pulp), it becomes inflamed, and in severe cases pus collects at the tip of the root. A root canal (endodontic treatment) removes the infected nerve tissue, disinfects the canals inside the roots, and fills the empty space with a sealing material so you can keep using your own tooth instead of having it pulled.

Treatment by cavity stage — from fillings to crowns

Treatment by cavity depth

Signs you may need a root canal

• Throbbing pain at night strong enough to wake you from sleep
• Sensitivity that lingers for tens of seconds or longer after hot or cold food or drink
• Pain that comes on by itself with no trigger, and you need painkillers to cope
• The tooth feels raised or gives a sharp, tingling pain when you bite or tap it
• The gum around the tooth is swollen or has a pimple-like pocket of pus
• The tooth is turning gray or dark

The root canal process — usually 2–4 visits

1. 1
   Diagnosis — X-rays and cold, heat and tapping tests check the condition of the nerve and how far the inflammation extends.
2. 2
   Anesthesia and nerve removal — after local anesthesia, the top of the tooth is opened and the infected nerve is removed.
3. 3
   Canal disinfection and shaping — the length of each root canal is measured and shaped, and it is disinfected several times. Between visits, medication is placed and the tooth is temporarily sealed.
4. 4
   Canal filling — once the inflammation settles, the empty canals are filled with a sealing material to keep bacteria out.
5. 5
   Core and crown — the weakened tooth is reinforced with a core (post) and finished with a crown.

The number of visits depends on the tooth's position, the number of roots and the degree of inflammation. A front tooth with little inflammation may be done in 1–2 visits, while a molar with several roots or a tooth with pus may take 3–4 visits or more. Visits are usually spaced a few days to a week apart.

What you can do on a short stay — two options

Options that fit your travel schedule

Why you need a crown after a root canal

A tooth that has had a root canal is usually already heavily drilled because of the cavity, and the walls that remain become thin because the top of the tooth is opened for treatment. Molars, which bear heavy chewing force, are at higher risk of vertical cracks or splitting if left as they are, so covering the whole tooth with a crown for protection is commonly recommended.

• Molars and premolars — a crown is generally recommended
• Front teeth or teeth with enough remaining structure — may be finished with a resin filling or similar
• If a lot of the tooth is missing, a core (post) is built up first, then the crown

What to do in a dental emergency while traveling

If a tooth is broken

• Keep any broken pieces in a clean container and rinse your mouth with lukewarm water
• Cover sharp edges with sugar-free gum or dental wax to protect your tongue and cheek
• Don't chew on that side, and if it is sensitive or bleeding, see a dentist as soon as possible

If a whole tooth has come out

• Don't touch the root; hold the tooth by the crown (the white part)
• If it is dirty, rinse it briefly in milk or saline for a few seconds (do not scrub)
• If possible, put it back in its socket and bite on gauze, or transport it in milk, saline or inside your cheek
• Time matters — get to a dentist as quickly as possible, ideally within 1 hour

If there is swelling or pus

• Use a cold compress to ease swelling; avoid heat
• Do not place aspirin directly on the gum (it can burn the gum)
• If swelling spreads across the face or under the jaw, or you have a fever, can't open your mouth well, or have trouble swallowing or breathing, go to an emergency room instead of a dental clinic — in Korea, call 119

Flying and toothache — why teeth hurt on a plane

When cabin pressure changes during a flight, air trapped inside a tooth or under a filling and pressure at inflamed areas can change, causing pain you don't normally have or making an existing toothache worse (barodontalgia). It mostly occurs in teeth with cavities, inflammation or unfinished treatment.

• If you already have pain or swelling, get examined and have the pain controlled before you leave
• If you are in the middle of a root canal, tell your dentist about your flight schedule in advance
• Keep prescribed painkillers in your carry-on bag
• If you have facial swelling or a fever, don't force yourself to board; get seen first

Travel life during treatment — food, alcohol and saunas

• On the day of treatment
  Hold off on eating until the anesthesia wears off, and be careful not to bite your cheek or tongue.
• Between visits
  With a temporarily sealed tooth, avoid hard or sticky foods such as rice cakes, caramel and nuts. If the temporary filling comes out, contact us right away.
• After completion
  Do not bite down hard on that tooth until the crown is placed.

• Avoid alcohol if you have inflammation or swelling, or while taking antibiotics
• Put off saunas and jjimjilbang (steam bath) activities that heat the body while you have swelling
• Everyday activities such as sightseeing and shopping are generally fine right away; contact us immediately if pain keeps getting worse or swelling grows

Dental records to take home

• Diagnosis and treatment for each tooth number (stage of the root canal, whether it is temporarily sealed)
• X-rays from before and after treatment (files or copies)
• Whether the canal filling is complete and the materials used; crown material and shade number
• Names of prescribed medications and how to take them
• The dentist's opinion on any treatment you need to continue after returning home

Questions to ask at your consultation

1. Do I definitely need a root canal, or can a resin filling or inlay do the job?
2. How many visits will I need, and how many days should I stay in Korea?
3. If it can't be finished within my schedule, how far is it safe to go before I leave?
4. Do I need a crown after the root canal? If so, when will it be placed?
5. Is my condition okay for flying?
6. What should I do if it hurts or swells after I return home?
7. In what form can I receive my X-rays and dental records?

How to choose a dental clinic

• Does the clinic confirm the cause with X-rays and exams, and honestly tell you if you don't need a root canal?
• Does it explain the treatment steps and number of visits realistically for your schedule?
• Even on a short schedule, does it avoid skipping necessary steps such as disinfection and filling?
• Can it see you in an emergency, and does it provide your dental records and X-rays?
• Does it offer foreign-language support and photo consultations after you return home?

KBEAU connects you with a partner dental clinic in Myeongdong, Seoul. If you suddenly get a toothache while traveling, send us your symptoms and photos. We will check when the clinic can see you, and a dedicated manager accompanies and interprets from diagnosis through treatment. We can also help with a schedule that allows for a root canal and crown, accommodation close to the clinic, and airport pickup car reservations.