What Is a Therapeutic Pulpotomy Procedure?

A therapeutic pulpotomy is a dental procedure that removes the inflamed or infected portion of a tooth’s pulp tissue while leaving the healthy pulp in the root canals intact and alive. Unlike a root canal, which strips the tooth of all its internal living tissue, a pulpotomy aims to preserve the tooth’s vitality by amputating only the damaged coronal pulp (the part inside the crown of the tooth) and sealing the wound with a biocompatible material that encourages healing. The procedure has long been a standard treatment for children’s baby teeth, but its use in adult permanent teeth is growing and reshaping how dentists think about managing deep decay.

When a Pulpotomy Makes Sense

The classic scenario for a pulpotomy involves a tooth with deep decay that has reached or come very close to the pulp, the soft tissue packed with nerves and blood vessels at the center of every tooth. When bacteria from a cavity invade the pulp, the tissue becomes inflamed, a condition called pulpitis. Dentists have traditionally split pulpitis into two camps: reversible, where the inflammation is mild and the tooth only hurts in response to hot or cold stimuli, and irreversible, where bacteria have pushed deeper, the pain lingers after the stimulus is removed, or the tooth aches on its own.¹ A pulpotomy was historically reserved for cases of reversible pulpitis or a clean traumatic exposure, but recent evidence has expanded those boundaries considerably.

In children’s primary (baby) teeth, the goal is straightforward: keep the tooth functional long enough for the permanent tooth underneath to erupt on schedule. Losing a primary molar too early can cause neighboring teeth to drift, crowding the space the adult tooth needs.² Pulpotomy buys time without the complexity and cost of a root canal on a tooth that will fall out anyway.

For young permanent teeth that have not finished growing, the stakes are different. These teeth have open root tips and thin walls. A root canal would kill the pulp and halt root development, leaving a structurally fragile tooth. A pulpotomy preserves the living root pulp so the tooth can continue to mature, a process dentists call apexogenesis. One case report showed complete root formation at 18 months after a pulpotomy on an immature permanent molar with irreversible pulpitis.³

What Happens During the Procedure

The tooth is numbed, and a rubber dam is placed to isolate it from saliva and bacteria. The dentist then removes all the decay and opens the roof of the pulp chamber to expose the coronal pulp tissue. In a “full” or “complete” pulpotomy, all the pulp tissue inside the crown portion of the tooth is removed down to the entrance of the root canals. In a “partial” pulpotomy, only a few millimeters of inflamed tissue at the exposure site are taken out. The choice depends on how deep the inflammation appears to extend.

Once the diseased pulp is removed, the dentist rinses the site to control bleeding. This hemostasis step is important: persistent heavy bleeding after a few minutes of gentle pressure suggests the inflammation extends deeper into the roots, which may mean the tooth needs a root canal instead. Sodium hypochlorite, the same chemical found in diluted bleach, is commonly used as the rinsing agent. A systematic review found that teeth rinsed with this solution during pulpotomy achieved a combined success rate of about 93%.⁴

After bleeding is controlled, a biocompatible capping material is placed directly over the remaining living pulp stumps. This material serves as a wound dressing and scaffold, sealing the exposed tissue from bacteria and encouraging the formation of a hard tissue barrier. The tooth is then restored with a permanent filling or crown.

Capping Materials and How They Compare

The material placed over the pulp stump is the linchpin of the whole procedure. Two calcium silicate cements dominate the field: mineral trioxide aggregate (MTA) and Biodentine. Both are biocompatible, meaning the body tolerates them well, and both release calcium ions that promote healing.

MTA has the longest track record and the deepest evidence base. A meta-analysis of randomized trials comparing MTA with formocresol, an older pulpotomy agent used in children’s teeth, found that MTA produced substantially fewer failures at every time point measured, from six months through two years.⁵ That evidence helped push formocresol, which contains formaldehyde and raised safety concerns, to the sidelines in many countries.

Biodentine arrived later and addressed some of MTA’s practical drawbacks: it sets faster and is easier to handle in the clinic.⁶ In head-to-head trials, Biodentine and MTA have performed similarly. One randomized trial in primary molars found clinical success of about 97% for Biodentine and 92% for MTA at 12 months, a gap that was not statistically significant.⁷ In traumatized immature permanent front teeth, the two materials again showed no meaningful difference in clinical or radiographic outcomes, except that MTA was significantly more likely to cause tooth discoloration.⁸ That staining issue matters if the tooth is visible when you smile, and it is a practical reason some clinicians prefer Biodentine for front teeth.

What Happens Inside the Tooth Afterward

The biological goal of a pulpotomy is to let the remaining healthy pulp heal and wall itself off from the capping material. A randomized trial that took tissue samples from pulpotomized permanent teeth at one week and six months showed a clear healing arc: at one week, most samples had significant inflammation and tissue disruption, but by six months, inflammation had dropped and the majority of teeth had formed a visible hard tissue bridge resembling dentin at the wound site.⁹ That bridge acts like a biological seal, protecting the living pulp below from the outside world.

In young patients with immature permanent teeth, this healing process also includes continued root growth. A long-term study of pulpotomies in young patients’ permanent molars reported that all treated teeth with open root tips showed continued root maturation, and about seven in ten teeth formed a visible hard tissue barrier. A separate finding from the same study was that roughly a fifth of teeth developed pulp canal obliteration, where the pulp space gradually fills in with hard tissue over time.¹⁰ Pulp canal obliteration is generally considered a sign of healing rather than a problem, though it can complicate future root canal treatment if one is ever needed.

Pulpotomy Compared to Root Canal Treatment

The question most adults have is simple: if a tooth needs treatment, why not just do a root canal and be done with it? The answer involves trade-offs in cost, complexity, and tooth longevity.

A pulpotomy is a shorter, simpler procedure. It can often be completed in a single visit, while a root canal on a molar typically requires at least one visit (sometimes two) plus a separate appointment for a crown. In terms of pain afterward, a randomized trial found that patients who received pulpotomies reported significantly less postoperative pain than those who had root canals.¹¹ Another trial found that pain dropped at a similar rate over the first week in both groups, with no real difference by day seven.¹² A systematic review pooling multiple studies confirmed no meaningful difference in postoperative pain at one week.¹³ So at worst, the pain experience is similar; at best, a pulpotomy hurts less in the first few days.

On the cost side, a modeling study estimated that root canal treatment provides about one additional year of tooth life over a patient’s lifetime compared to pulpotomy, but at a substantially higher cost. The analysis found pulpotomy to be the cost-effective choice when patients or systems were unwilling to pay more than modest amounts per additional year of benefit, while root canal treatment became the better value only at higher spending thresholds.¹⁴ A broader review of the health economics literature concluded that maintaining pulp vitality is generally preferable to root canal treatment when cost-effectiveness is considered.¹⁵

For children’s primary teeth specifically, a retrospective study found that pulpotomy teeth survived longer than teeth treated with pulpectomy (a procedure closer to a full root canal). At four years, clinical survival was about 77% for pulpotomy compared to 53% for pulpectomy.¹⁶ A meta-analysis of randomized trials in primary teeth, however, found no statistically significant difference in clinical or radiographic success between the two approaches.¹⁷ The mixed findings suggest that in primary teeth, both treatments can work, but pulpotomy’s simplicity and lower cost give it a practical edge.

Why the Final Restoration Matters More Than You Think

A pulpotomy can succeed or fail based on what goes on top of the tooth afterward. The capping material protects the pulp, but the outer restoration protects everything from bacteria re-entering the tooth. A large practice-based study in Helsinki found that primary molars restored with stainless steel crowns after pulpotomy survived an average of about 111 months, far longer than the overall average of 82 months across all restoration types.¹⁸

The gap is even more striking in permanent teeth. A retrospective study of young permanent molars found that stainless steel crowns had a seven-year survival probability of about 87%, while direct resin composite fillings survived at just 36%. Teeth restored with composite had roughly seven and a half times the risk of failure compared to those with crowns.¹⁹ The lesson is clear: a tooth-colored filling may look better, but if the pulpotomy tooth is a molar taking heavy chewing forces, a crown offers dramatically better long-term protection.

Complications and What Failure Looks Like

When a pulpotomy fails, the most common outcome is persistent or returning symptoms: pain, swelling, or signs of infection on an X-ray such as a dark area at the root tips (periapical radiolucency) or bone loss in the area between roots (furcation involvement). At that point, the tooth typically needs either a root canal or extraction.

One complication worth knowing about is internal root resorption, where the body’s own cells begin dissolving the root from the inside. This is relatively uncommon but not negligible. A study of pulpotomized primary molars found that about 22% showed internal resorption on X-rays.²⁰ In primary teeth, mild resorption is sometimes tolerated because the tooth is going to be lost anyway, but it needs to be monitored. Internal resorption has also been reported in permanent teeth after vital pulp therapy, though it is considered rare in that context.²¹ Regular follow-up X-rays are how these problems get caught before they become emergencies.

A two-year retrospective study of full pulpotomies in mature permanent teeth with irreversible pulpitis reported an overall success rate of about 91%, with four out of 43 teeth requiring root canal treatment within two years.²² That failure rate is not zero, but it means roughly nine out of ten teeth avoided a root canal entirely.

The Expanding Role in Adult Permanent Teeth

For decades, the rule was simple: if an adult permanent tooth had irreversible pulpitis, it needed a root canal. Pulpotomy was considered a children’s procedure. That thinking has been shifting since the early 2010s, driven by studies showing that the adult pulp retains more healing capacity than previously assumed.

A retrospective survival analysis that included patients ranging from 8 to 79 years old found that age at the time of pulpotomy did not significantly affect success rates.²³ That finding challenges the assumption that older pulps are too degenerated to heal. The long-term study of young patients with irreversible pulpitis symptoms found 100% clinical and radiographic success, with all periapical lesions resolving completely over the follow-up period.¹⁰

Still, the evidence base remains young. An overview of systematic reviews of randomized controlled trials concluded that current evidence is not yet strong enough to definitively recommend pulpotomy over root canal treatment for irreversible pulpitis in mature permanent teeth. The authors noted that favorable outcomes and the minimally invasive, cost-effective nature of the procedure make it a practical alternative in select cases, but called for more high-quality trials.²⁴ In practice, this means that whether your dentist offers a pulpotomy for an adult tooth depends heavily on their training, comfort level, and the specifics of your case. Most dental schools now teach the technique, but it is not yet the default approach the way root canal treatment is.

There is also a diagnostic gray area that makes case selection tricky. The clinical distinction between reversible and irreversible pulpitis is imprecise; the actual state of the pulp tissue often does not match what the symptoms suggest. Some teeth diagnosed as having irreversible pulpitis turn out to have localized inflammation that responds well to pulpotomy, while others that seem manageable reveal deeper damage once the dentist opens the tooth. Bleeding that does not stop within a few minutes after pulp removal is the main intraoperative red flag that the remaining pulp may be too inflamed to save.

MTA Pulpotomy in Front Teeth and Incisors

Most of the pulpotomy evidence, especially in primary teeth, comes from studies on molars. There is considerably less data on primary incisors (baby front teeth), and what exists is limited enough that some reviews have flagged the gap.²⁵ Primary incisors are smaller, have thinner roots, and resorb earlier than molars, which makes them behave differently during and after treatment. For permanent front teeth, the discoloration issue mentioned earlier becomes a real cosmetic concern. MTA, particularly the gray formulation, can darken a tooth noticeably over time. White MTA and Biodentine cause less staining, and for visible teeth, most clinicians now lean toward materials that minimize color change.

Emerging therapies like enamel matrix derivative (a protein product used in periodontal treatment) have been tested experimentally as pulpotomy agents. A comprehensive review found only a single qualifying animal study, and the results did not favor enamel matrix derivative over established materials: calcium hydroxide produced more hard tissue formation in tissue samples, while MTA still performed best by clinical and radiographic measures.²⁶ For now, calcium silicate cements remain the materials to beat, and the research effort is focused more on refining how and when to use them than on replacing them with something fundamentally different.