Vital pulp therapy can only save the living part of a tooth's nerve. If the pulp inside the tooth has already died, there is nothing living left to protect, and the usual choices become root canal treatment or removing the tooth. If infection has spread from the tooth into the bone around the root tip, vital pulp therapy becomes less likely to suit. Many people asking about vital pulp therapy have heard it described as a way to avoid a root canal. For the right tooth it can be, but the deciding factor is the state of the pulp, not how much you would prefer to avoid a root canal.
This article explains what has to be true for vital pulp therapy to be an option, the signs that point the other way, and what those signs look like on an X-ray.
Vital pulp therapy needs a pulp that is still alive
Vital pulp therapy covers a few procedures: a pulp cap, where a small exposure of the nerve is sealed, and a partial or full pulpotomy, where the inflamed part of the pulp is removed and the healthy remainder is covered with a calcium silicate material such as Biodentine. Our article on vital pulp therapy explains these steps in more detail.
The thinking on painful teeth has changed. A 2026 international consensus from the International Association of Paediatric Dentistry Porto Forum, which covered permanent as well as baby teeth, states that a full pulpotomy can be an alternative to root canal treatment for mature permanent teeth (adult teeth with fully formed roots) where decay has reached the pulp and there are signs of irreversible pulpitis, such as spontaneous or lingering pain. It adds one condition: there must be no signs or symptoms of pulp necrosis, meaning the pulp has not died.
The PROVE study, a set of randomised trials in eight countries published in 2026, compared full pulpotomy with root canal treatment in back teeth with painful irreversible pulpitis. Of 410 patients randomised, 385 had data available. Both relieved pain over the first week, but root canal treatment gave greater pain relief and less painkiller use over that week. Early failure, meaning another procedure was needed within four weeks, happened in 10 of 192 pulpotomies (5.2%) and 1 of 193 root canal treatments (0.5%). So pulpotomy is a real option for the right tooth, with trade-offs worth discussing.
Signs the pulp may already have died
No single sign settles the question, and a dentist puts the history, tests and X-rays together. These are the findings that make vital pulp therapy unlikely to be suitable:
| Finding | What it suggests | Why it matters |
|---|---|---|
| No response to a cold test | The pulp may no longer be alive | A 2018 meta-analysis found the cold test correctly identified most teeth with a non-vital pulp (pooled sensitivity 87%), though it can be wrong in both directions |
| A dark area at the root tip on an X-ray | Apical periodontitis, an infection or inflammation in the bone around the root | The PROVE trials excluded teeth with this finding. In a cohort of 1,257 teeth treated with vital pulp therapy, this sign was linked with a higher risk of failure (hazard ratio about 3) |
| Swelling, pus or a pimple on the gum that drains | An abscess, which can track through the gum as a sinus tract | The PROVE trials excluded any tooth where pus was found during treatment. A 1989 review of sinus tracts from tooth abscesses draining through the skin found they usually resolve, if recognised early, after root canal treatment or extraction |
| No bleeding when the pulp is opened | The pulp is not alive | In the PROVE protocol, a pulp that did not bleed, even in one canal, was treated as non-vital and root canal treatment was carried out |
| Bleeding that cannot be controlled | The remaining pulp may be too inflamed | In PROVE, if bleeding did not stop within 10 minutes, the tooth received root canal treatment instead |
Two of these can only be known once treatment has started. That is why a dentist planning vital pulp therapy will usually explain beforehand that the appointment may need to become a root canal treatment if the pulp turns out to be non-vital or will not stop bleeding.
What the X-ray can and cannot show
A periapical X-ray, which shows the whole tooth including the root tip, is part of the standard work-up. In the PROVE trials, the X-ray had to clearly show the depth of decay or the filling and the area around the root tip. A dark area at the tip of the root is a sign of apical periodontitis.
X-rays have limits. A 2015 systematic review found a tendency for 3D scans (cone beam CT) to detect lesions at the root tip more accurately than standard X-rays, but found no studies that justified using 3D scans routinely for this purpose. An X-ray also shows how deep the decay is, not how inflamed the pulp is, which is why it is read together with symptoms and tests.
Symptoms that need a closer look
Spontaneous pain and pain that lingers after cold are typical of irreversible pulpitis, and night pain is one of the features a dentist asks about. On their own they do not rule out vital pulp therapy under current consensus. Our article on reversible and irreversible pulpitis explains the difference.
Clinical diagnosis of the pulp is usually, but not always, right. In a study that compared the clinical diagnosis with the pulp examined under the microscope after extraction, a diagnosis of a normal or reversibly inflamed pulp matched in 57 of 59 teeth (97%), and irreversible pulpitis matched in 27 of 32 (84%).
In the PROVE study, teeth whose pulpotomy failed early had taken longer for the bleeding to stop during treatment, although only 10 teeth failed, so the authors advise caution. A toothache that has gone quiet still needs checking, as our article on a toothache that stopped on its own explains. Our article on the signs of a dead or dying tooth covers colour change and other clues.
healthdirect advises emergency medical care if toothache or gum swelling causes problems with breathing or speaking, or swelling around the eye or neck.
The tooth also has to be restorable
Vital pulp therapy relies on a well-sealed filling or crown afterwards. The 2026 consensus lists confirming pulp vitality and the ability to place a well-sealed restoration before a conservative approach to deep decay, and notes that a well-sealed restoration improves long-term success, and the PROVE trials only included teeth that were restorable and could be kept dry during treatment. A tooth with decay extending far below the gum, or too little tooth left to seal, may not be suitable whatever the state of the pulp.
For dentists: case selection and the bleeding check
The PROVE protocol, used in posterior teeth, gives a practical template. Before treatment: a cold test, a periapical radiograph clearly showing the depth of the caries or restoration and the periapical area, and a check that the tooth is restorable and can be isolated. Teeth with an apical radiolucency, pockets over 5 mm or a history of trauma were excluded. During treatment: after removing the coronal pulp, bleeding was controlled with a cotton pellet soaked in 2% to 4% sodium hypochlorite for 2 minutes, repeated up to five times. No bleeding, in the whole pulp or in any one canal, or bleeding still present at 10 minutes, meant converting to root canal treatment.
The 2026 consensus adds two points: bleeding time should be weighed alongside other signs rather than used on its own, and magnification is suggested to inspect the exposed pulp, including bleeding and any areas of necrosis. In PROVE, time to haemostasis averaged 7.0 minutes in early failures and 4.0 minutes in successes. Other reported associations rested on very few failures (10) with no multivariable analysis, so they are weak grounds for case selection.
For enquiries that arrive by phone or email asking specifically for vital pulp therapy, asking for a recent periapical X-ray and whether there is any swelling or a gum boil can help sort out which patients may be candidates before a long consultation.
Questions people ask
Can antibiotics clear the infection so the nerve can be saved?
healthdirect notes that antibiotics are usually not used for a toothache unless there is a clear infection. A Cochrane review found too little evidence to say whether antibiotics reduce the pain of irreversible pulpitis, and the 2026 consensus supports full pulpotomy in place of root canal treatment only where there are no signs or symptoms of pulp necrosis. Our article on a tooth abscess explains how an infected tooth is treated.
If my tooth has a dark spot on the X-ray, is extraction the only option?
No. A dark area at the root tip often means root canal treatment is the main way to keep the tooth. Some teeth with this finding have been treated with vital pulp therapy, but in a large cohort failure was more likely. Whether that is the best choice depends on how restorable the tooth is. Our article on root canal treatment covers what is involved.
Does a root canal mean the tooth is dead?
After root canal treatment the pulp has been removed, so the tooth no longer has a living nerve inside, but it stays in place, held by the gum and bone around the root.
Having the tooth assessed
At Lumi Dental we use bioceramic materials, including Biodentine, for pulp protection when a tooth is suitable for vital pulp therapy, and we provide root canal treatment when it is not. After your examination you will usually receive a written treatment plan, often by email. If the tooth is painful or swollen, our emergency dental care page explains how to arrange an emergency appointment at our Melrose Park practice.
Sources
- Dhar V and colleagues (International Association of Paediatric Dentistry Porto Forum). Consensus-based recommendations on pulp therapies in primary and permanent teeth. International Journal of Paediatric Dentistry, 2026. PubMed 41622922
- El Karim IA and colleagues. Short-term outcomes of full pulpotomy compared with root canal treatment for irreversible pulpitis: the PROVE study. International Endodontic Journal, 2026. PubMed 42370524
- Asgary S and colleagues. Outcomes and predictive factors of vital pulp therapy in a large-scale retrospective cohort study over 10 years. Scientific Reports, 2024. PubMed 38267594
- Mainkar A, Kim SG. Diagnostic accuracy of 5 dental pulp tests: a systematic review and meta-analysis. Journal of Endodontics, 2018. PubMed 29571914
- Ricucci D, Loghin S, Siqueira JF Jr. Correlation between clinical and histologic pulp diagnoses. Journal of Endodontics, 2014. PubMed 25312886
- Agnihotry A and colleagues. Antibiotic use for irreversible pulpitis. Cochrane Database of Systematic Reviews, 2019. PubMed 31145805
- Kruse C and colleagues. Cone beam computed tomography and periapical lesions: a systematic review analysing studies on diagnostic efficacy by a hierarchical model. International Endodontic Journal, 2015. PubMed 25283541
- Hodges TP, Cohen DA, Deck D. Odontogenic sinus tracts. American Family Physician, 1989. PubMed 2662719
- Healthdirect Australia. Toothache and gum swelling. healthdirect.gov.au
This article is general information only and is not a substitute for an in-person assessment by a dental professional.
