Pulpotomy: when a cavity has reached the nerve
Often called a baby root canal, a pulpotomy treats deep cavities that have reached the pulp tissue inside a primary tooth. The procedure preserves the tooth, prevents infection, and lets the natural eruption sequence proceed without an extraction.
How a pulpotomy differs from a filling
A standard filling treats a cavity that has affected enamel and dentin but has not reached the dental pulp, which is the soft tissue inside the tooth containing nerves and blood vessels. When a cavity has progressed deep enough to reach the pulp, a filling alone is no longer sufficient because the pulp tissue itself is now inflamed or infected.
A pulpotomy treats this situation by removing the inflamed coronal portion of the pulp (the part inside the crown of the tooth) while leaving the healthy radicular pulp (the part inside the roots) in place. A medication is applied to the remaining pulp tissue to maintain its vitality, and then the tooth is restored, typically with a stainless steel or zirconia crown for added protection.
The result is a tooth that retains its function and natural eruption pattern. The primary tooth stays in the arch, holds space for the permanent tooth, and falls out naturally when the time comes.
Why pulpotomy instead of just pulling the tooth
Parents often ask why we work to save a baby tooth that is going to fall out anyway. The reasoning has several layers.
First, primary teeth serve as space-holders for the permanent teeth that will replace them. Losing a primary tooth too early can cause the surrounding teeth to drift into the empty space, leaving inadequate room for the permanent tooth when it tries to erupt. The result is crowding, impaction, or orthodontic problems that require treatment later.
Second, an infected primary tooth, if left untreated or extracted, can damage the developing permanent tooth bud underneath. The infection can travel through the bone and cause defects in the enamel of the permanent tooth, or in severe cases prevent normal eruption.
Third, primary teeth are essential for chewing, speech development, and maintaining the shape of the dental arch. Premature loss affects all three.
The exception is when the tooth is too damaged to save (cracked through the root, abscessed beyond what pulpotomy can resolve, or severely mobile). In those cases, extraction with a space maintainer is the right answer.
What happens during a pulpotomy
- The tooth is anesthetized with local anesthetic. We use the smallest needles available and patient-friendly delivery technique. Many pulpotomies are done with nitrous oxide for additional comfort, and complex cases or anxious patients may benefit from IV sedation.
- A rubber dam is placed to isolate the tooth and keep the area dry.
- The cavity is removed and access is made into the pulp chamber.
- The coronal pulp tissue is removed using a special instrument.
- The pulp chamber is rinsed and the bleeding from the remaining radicular pulp is controlled.
- A medicament (typically ferric sulfate or mineral trioxide aggregate, depending on case) is applied to the remaining pulp.
- The chamber is sealed with a base material.
- The tooth is restored, usually with a stainless steel or zirconia crown.
The full procedure for a single tooth typically takes forty-five to sixty minutes. Multiple pulpotomies can be combined with crown placement in a single visit if the child can tolerate the appointment, often with IV sedation for complex cases.
Recovery after a pulpotomy
The first day after a pulpotomy, expect some tenderness around the tooth, mild gum soreness from the local anesthetic injection, and possible jaw stiffness from holding the mouth open during the procedure. Soft foods and avoiding the affected side for the first day make recovery easier. Over-the-counter ibuprofen at age-appropriate dosing is usually adequate for any discomfort.
The treated tooth typically functions normally within a day or two. The crown placed over the treated tooth provides full-coverage protection until the primary tooth is naturally exfoliated.
Long-term, we monitor the tooth at every checkup with both clinical exam and periodic x-rays. The success rate for pulpotomy is high, but in a small percentage of cases the radicular pulp can develop infection over time. We watch for signs of this and intervene with extraction if it occurs.
Pulpotomy questions parents ask
Is a pulpotomy the same as a root canal?
Similar concept but different scope. A pulpotomy removes only the coronal portion of the pulp and is used in primary teeth. A full root canal removes all the pulp tissue including the roots and is typically done in permanent teeth.
Will my child be in pain after the procedure?
Most children have only mild discomfort that responds to ibuprofen. Significant pain is uncommon and warrants a call to our office.
Why not just pull the tooth?
Premature loss of a primary tooth can cause orthodontic problems and may damage the developing permanent tooth underneath. We save baby teeth when we can.
Will my child need to be sedated?
Local anesthesia is standard. Nitrous oxide is often used for added comfort. IV sedation is appropriate for very anxious children, complex multi-tooth cases, or special-needs patients.
How successful is a pulpotomy?
Success rates are high, typically reported around ninety percent or higher in studies. We monitor the tooth at every visit.
Why does my child need a crown after a pulpotomy?
A tooth that has had a pulpotomy is more brittle and more prone to fracture under chewing forces. The crown provides full-coverage protection.
Can my child eat normally afterward?
After the local anesthetic wears off (two to three hours), normal eating is fine. Soft foods for the first day are easier on a tender mouth.
Concerned about a deep cavity?
Call (916) 638-8778 to schedule. Catching deep cavities early often means a pulpotomy instead of an extraction.