A pulpectomy is a dental procedure that removes all the infected pulp from inside a baby tooth, including the pulp deep in the roots. It’s often called a “baby root canal,” and it’s one of the most common ways pediatric dentists save a primary tooth that might otherwise need to be pulled. If your child’s dentist has recommended one, here’s what the procedure involves and what to expect.
Why a Baby Tooth Needs a Pulpectomy
Every tooth has soft tissue inside it called pulp, which contains nerves and blood vessels. When a deep cavity or a crack reaches that pulp, bacteria can cause infection and inflammation. In a baby tooth, that infection can spread quickly and cause significant pain.
A pulpectomy removes all the infected pulp, cleans the inside of the tooth, and fills it with a medicated material. The goal is to eliminate the infection while keeping the baby tooth in place until the permanent tooth is ready to come in. Baby teeth act as natural spaceholders, guiding adult teeth into the correct position. Losing one too early can lead to crowding or alignment problems later.
Pulpectomy vs. Pulpotomy
These two procedures sound similar but differ in how much tissue they remove. A pulpotomy removes only the damaged pulp from the crown of the tooth (the visible part above the gumline), leaving healthy pulp in the roots intact. It’s a less invasive option used when infection hasn’t spread below the gumline.
A pulpectomy goes further. It removes all the pulp from both the crown and the roots. Dentists choose this route when the infection is too widespread for a pulpotomy to work, or when the pulp tissue in the roots is already dead or irreversibly inflamed.
How It Differs From an Adult Root Canal
A pulpectomy and an adult root canal follow the same basic logic: remove infected pulp, clean the canals, fill the space. The key difference is what goes inside afterward. In a pulpectomy on a baby tooth, the filling material is designed to be reabsorbed by the body over time, so it dissolves naturally as the baby tooth loosens and falls out. An adult root canal uses a permanent cement filling and is typically capped with a crown, since that tooth needs to last a lifetime.
Pulpectomies are also generally completed in a single appointment, while adult root canals often require two visits.
What Happens During the Procedure
The dentist starts by numbing the area around the tooth so your child won’t feel pain. A rubber dam or similar isolation device is placed around the tooth to keep it dry and prevent bacteria from spreading during the procedure.
Next, the dentist creates an opening in the top of the tooth to access the pulp chamber. All the infected or dead pulp tissue is carefully removed from the chamber and root canals using small, flexible instruments. The canals are then flushed with a cleaning solution to disinfect them and dried with cotton.
Once the canals are clean, they’re filled with a resorbable paste. Several types exist. Iodoform-based pastes resorb quickly and have strong disinfectant properties. One widely used version can be reabsorbed by the body in as little as one to two weeks if any material extends beyond the root tip. Zinc oxide eugenol, used since the 1930s, is another common option, though it resorbs more slowly and small fragments can sometimes linger in the tissue after the baby tooth falls out. Finally, the tooth is sealed with a filling or capped with a stainless steel crown to protect it.
Success Rates
Pulpectomies on baby teeth have strong long-term outcomes. A clinical study tracking treated teeth over five years found survival rates between 81% and 87%, meaning the vast majority of treated teeth stayed healthy and functional until the permanent tooth was ready to replace them.
The biggest predictor of whether a pulpectomy might fail was the severity of infection before the procedure. Teeth that already showed signs of bone involvement on X-rays before treatment were nearly four times more likely to eventually need retreatment or extraction compared to teeth with less advanced infection. This is one reason dentists prefer to treat infections early rather than waiting.
When a Pulpectomy Isn’t an Option
Not every damaged baby tooth can be saved. A pulpectomy is contraindicated when the tooth has lost too much structure to be restored, when the roots have already resorbed to less than two-thirds of their original length (meaning the permanent tooth is close to coming in anyway), or when the tooth is loose due to inadequate bone support. Teeth with a perforated floor at the base of the pulp chamber, or cases where the infection has already affected the developing permanent tooth underneath, also call for extraction instead.
Children with certain medical conditions that make them more vulnerable to infection may also be better candidates for extraction rather than a pulpectomy.
Recovery and Aftercare
Most children bounce back quickly after a pulpectomy. The numbness from the local anesthetic typically wears off within a couple of hours. Some soreness or sensitivity around the treated tooth is normal for the first day or two, and over-the-counter children’s pain relievers usually manage it well.
Soft foods are a good idea for the rest of the day, especially if your child has a temporary filling or a new crown that needs time to settle. Avoid sticky or very hard foods near the treated tooth for the first 24 hours. Normal brushing can resume, though your child may want to be gentle around the area for a few days. If swelling, fever, or increasing pain develops after the first couple of days, contact your child’s dentist, as these can be signs the infection hasn’t fully resolved.
Protecting the Tooth Long-Term
A pulpectomy removes the living tissue inside a tooth, which means the tooth no longer has a blood supply and can become more brittle over time. This is why many dentists place a stainless steel crown over the treated tooth rather than just a filling. The crown protects the tooth from fracturing during normal chewing and keeps bacteria from re-entering the sealed canals.
The treated tooth will eventually fall out on its own as the permanent tooth pushes through, just like any other baby tooth. The resorbable filling material inside dissolves as part of this natural process. Regular dental checkups allow the dentist to monitor the treated tooth with periodic X-rays, confirming the area stays healthy and the permanent tooth is developing normally underneath.