Baby root canals (pulp therapy)

What the pulp is, and why it matters

Beneath the hard outer layers of every tooth is the pulp: soft tissue that holds the tooth's nerve and blood vessels. It runs from the center of the tooth down through the roots.

When a cavity grows deep enough, or an injury cracks a tooth, bacteria can reach the pulp. The tissue becomes inflamed and, without treatment, infected, which can cause a throbbing ache or pain that seems to come from nowhere. Left alone, the infection can spread to the bone around the roots.

"Baby root canal" can sound frightening, but treating a baby tooth's pulp is usually quicker and simpler than an adult root canal. The goal is to remove the unhealthy tissue and keep the tooth working until it's ready to come out.

Pulpotomy vs. pulpectomy

There are two main types of pulp therapy for baby teeth. The right one depends on how far the inflammation or infection has spread, judged from the exam, symptoms, and X-rays.

Pulpotomy: treating the top of the pulp

A pulpotomy is the more common of the two. When only the pulp in the crown of the tooth is affected, the dentist removes that portion and leaves the healthy pulp in the roots alone. A medicated material is placed over the remaining tissue to protect it, and then the tooth is sealed and rebuilt.

Pulpectomy: treating the whole pulp

If infection has reached the roots, a pulpectomy removes all of the pulp. The dentist gently cleans the narrow root canals and fills them with a material designed to dissolve over time, just as a baby tooth's roots naturally dissolve when the adult tooth is getting ready to come in.

When decay is close to the pulp but not into it

If a deep cavity hasn't quite reached the nerve, the dentist may remove most of the decay, leave a thin protective layer over the pulp, and seal the tooth. This can help the pulp stay healthy without a pulpotomy.

Signs your child may need pulp therapy

Some children don't complain at all, but these signs suggest the pulp may be involved:

• An ache that lingers after something cold, hot, or sweet is gone.
• Pain that starts on its own, especially pain that wakes your child at night.
• Pain when chewing or biting on one side.
• A small pimple or bump on the gum near a tooth, which can signal infection.
• Swelling of the gum or face.
• A tooth that turns gray or darker after a bump or fall.
• A deep cavity on an X-ray, even if your child hasn't felt anything yet.

Only an exam, including low-dose digital X-rays, can tell for sure. If your child is hurting right now, our parent guide to toothache in children: causes, home care, and when to call explains safe ways to ease pain at home and which symptoms need a same-day call.

What happens during pulp therapy

Pulp therapy and the crown are usually done in the same appointment, so your child leaves with the tooth fully repaired.

1. Numb the tooth

   Numbing gel first, then local anesthetic given slowly. We make sure the tooth is fully numb before going further.

2. Put on a tooth "raincoat"

   A small rubber shield, called a dental dam, keeps the tooth clean and dry and stops water and tiny bits from going down your child's throat.

3. Clear the decay

   We remove the decayed part of the tooth to reach the pulp.

4. Treat the pulp

   For a pulpotomy, we remove the affected pulp in the crown and place a medicated material. For a pulpectomy, we clean and fill the root canals.

5. Restore the tooth

   The tooth is sealed and covered, most often with a crown.

6. Check the bite

   We make sure everything feels even when your child bites down.

Keeping your child comfortable

A child who has had a toothache may arrive already worried, so comfort comes first. We explain each step with our tell-show-do approach, and parents are welcome chairside to help kids settle in. A tooth with an inflamed nerve can take a little longer to numb, so we never rush that step.

Many children do well with local numbing alone. For a nervous child, nitrous oxide (laughing gas) can take the edge off: they remain awake, feel its effect within minutes, and are back to normal a few minutes after switching to plain oxygen. For extensive treatment or special health care needs, we may discuss oral sedation or general anesthesia in a hospital or surgery center. Our page on sedation and laughing gas for kids covers each option.

Why a crown usually follows

After pulp therapy, a baby tooth is hollowed out in the middle and more likely to crack. It also needs a tight seal so bacteria can't leak back in. A crown does both jobs by covering and protecting the whole tooth. Baby molars usually get a stainless steel or white zirconia crown, while a front tooth may be restored with a tooth-colored crown or, in some cases, a filling.

Our page on crowns for baby teeth compares the types and explains how to care for them.

Aftercare: what's normal and when to call

Most children are back to their usual routine the same day. Here's what to expect:

• Numbness for a few hours. Until feeling returns, make sure your child doesn't chew on their lip, tongue, or cheek, and hold off on chewy foods.
• Some tenderness. The gum around the tooth may be sore for a day or two, especially if a crown was placed. Soft foods help. If your child needs a pain reliever, use a children's product, follow the dosing on the label, and check with your pediatrician if you're unsure.
• Relief from the original toothache, often soon after treatment, since the source of the pain is gone.

Call us if pain gets worse after the first couple of days, swelling appears or returns, your child develops a fever, or a bump shows up on the gum near the tooth.

Follow-up checks

We'll check the treated tooth at regular visits, sometimes with an X-ray. Pulp therapy is usually successful, but occasionally a treated baby tooth develops problems later and needs to be removed. Catching that early is one more reason to keep up with regular checkups.

Why save a baby tooth instead of pulling it?

Pulling the tooth might seem quicker, but a baby tooth that stays in place keeps working: it helps your child chew and speak clearly, and it holds space for the adult tooth developing underneath. Our parent guide on why baby teeth matter explains these jobs in more detail.

If a baby tooth is removed early, the teeth beside it can drift into the gap, so the dentist may recommend a space maintainer, a small appliance that holds the space until the adult tooth arrives. Saving the tooth often avoids that extra step.

Extraction is sometimes the better choice, for example when infection is too extensive or the tooth is already close to falling out. We'll explain our reasoning so you can decide together.

Cost and insurance

Pulp therapy and the crown that follows usually appear as separate items on an estimate, and dental plans may cover each one at a different level. We accept most PPO plans and verify your benefits before treatment, so you'll know your expected share ahead of time. Our insurance and payment information explains how estimates work.