A pulpectomy is a root canal procedure for baby teeth. It removes all the infected or damaged soft tissue (called pulp) from inside a child’s tooth, including the pulp deep in the roots below the gumline. The cleaned-out canals are then filled with a material that dissolves naturally as the baby tooth falls out on its own. It’s one of the most common ways pediatric dentists save a badly decayed baby tooth rather than pulling it.
How a Pulpectomy Differs From a Pulpotomy
These two procedures sound almost identical, and parents often confuse them. The key difference is how much tissue gets removed. A pulpotomy only removes damaged pulp from the crown of the tooth, the visible part above the gumline. The healthy tissue in the roots stays intact. It works when the infection or decay hasn’t spread beyond the upper portion of the tooth and is most commonly done on baby molars, which contain more pulp than other teeth.
A pulpectomy goes further. All the pulp is removed, crown and roots alike. Dentists choose this route when the tissue is too damaged or too infected to leave any of it behind. The deciding factor often comes down to what’s happening in the bone around the tooth. If X-rays show bone starting to break down between the roots, or if there’s visible pus on the gums, those are signs the infection has spread and a full pulpectomy is needed to clear it.
Interestingly, for baby front teeth with decay that has reached the pulp, current guidelines from the American Academy of Pediatric Dentistry suggest a pulpotomy is likely to produce better outcomes than a pulpectomy. So the choice between the two isn’t simply “more treatment is better.” It depends on which tooth is affected and how far the damage extends.
Why Baby Teeth Are Worth Saving
A common question parents have is why not just pull the tooth if it’s going to fall out anyway. Baby teeth hold space for the permanent teeth developing underneath. When a baby tooth is lost too early, neighboring teeth can drift into the gap, causing the adult tooth to come in crooked, crowded, or blocked entirely. Saving the tooth with a pulpectomy keeps that natural space holder in place until the permanent tooth is ready to erupt.
What Happens During the Procedure
A pulpectomy follows the same basic logic as an adult root canal but uses materials designed specifically for baby teeth. After numbing the area, the dentist opens the tooth, removes all the infected pulp from the crown and root canals, cleans and shapes the canals with small instruments, and irrigates them to flush out bacteria. The empty canals are then filled with a resorbable material, one that will break down over time so it doesn’t interfere with the permanent tooth growing in beneath it.
The filling materials most commonly used include zinc oxide and eugenol (a paste made from zinc oxide powder and a clove-derived liquid), iodoform-based pastes, or a combination of zinc oxide, iodoform, and calcium hydroxide. Research reviewed by the AAPD ranks the zinc oxide/iodoform/calcium hydroxide combination as the top performer for long-term success, with zinc oxide and eugenol close behind. After filling the canals, the tooth is typically capped with a crown to protect its structure.
Recovery Is Quick
Most children bounce back fast. The numbing medication wears off within about an hour, and children typically feel fine the next day and can return to their normal routine. For the first few days, soft foods are a good idea, and you’ll want to remind your child not to bite down on a temporary crown if one was placed. If your child has severe pain that doesn’t respond to over-the-counter pain relief, that warrants a call to the dentist.
How Long the Results Last
The goal of a pulpectomy isn’t to last forever. It just needs to hold until the permanent tooth is ready to come in. A retrospective study published in the Journal of Dental Sciences tracked primary teeth after pulpectomy and found that baby molars had a 97% survival rate at 6 months, dropping to about 87% at one year, 57% at two years, and 37% at two and a half years. For baby front teeth, the 30-month survival rate was higher at about 59%.
These numbers may look low at first glance, but context matters. Many of those “failures” happen in teeth that were already close to their natural shedding time. A pulpectomy done on a 3-year-old’s molar that lasts two years has done its job if the permanent tooth is on track. The dentist considers your child’s age and how soon the adult tooth is expected when deciding whether a pulpectomy makes sense or whether extraction with a space maintainer is a better path.
Risks to Permanent Teeth
When a pulpectomy fails or complications arise, the underlying permanent tooth can occasionally be affected. A large retrospective study found that out of 117 teeth where the permanent successor was impacted, the most common issues were altered eruption direction (the adult tooth coming in at an angle), premature eruption (the adult tooth pushing through earlier than expected), and in rare cases, cyst formation around the root tip. Early loss of the baby tooth after a failed pulpectomy can also cause the permanent tooth to shift its path.
These complications are relatively uncommon, and regular follow-up X-rays allow the dentist to catch problems early. If the treated tooth shows signs of ongoing infection or if the root is resorbing faster than expected, the dentist can intervene before the permanent tooth is affected.
Signs Your Child May Need One
A pulpectomy becomes necessary when decay or trauma has reached the pulp and caused irreversible damage or death of the tissue. Signs that a baby tooth has reached this point include spontaneous pain (especially at night), swelling of the gums near the tooth, a visible abscess or pus near the gumline, and discoloration of the tooth. X-rays showing bone loss between the roots or around the root tips confirm that the infection has spread beyond the tooth itself. In some cases, a dentist may start with a pulpotomy and convert to a pulpectomy during the procedure if they find the infection extends into the roots.