Deep caries: is it still possible to save the tooth without a root canal?

What is deep caries and why does the question of the nerve arise?

Deep caries is a tooth lesion where the carious cavity penetrates the enamel and dentine and reaches or approximates the pulp — the inner part of the tooth which houses nerves and blood vessels.

In such situations, patients often ask:

Can deep caries be treated without a root canal, is it necessary to remove the nerve when deep caries is present, can a filling be placed in cases of deep decay, what is the probability of saving the nerve, and is it possible to place a filling in the case of deep caries?

The pulp plays a vital role: it provides nutrients to the tooth. If it is compromised or unnecessarily removed, the tooth becomes brittle and may require more complex treatment over time.

How to tell if tooth decay has reached the nerve: key symptoms

It is important to determine whether there is still a chance to save the nerve, or whether it needs to be removed.

Main symptoms:

1. Prolonged or severe toothache, especially at night.
2. Swelling of the gums or fistula (a sign of infection in the later stages).

To determine whether the nerve can be saved, the dentist assesses the symptoms and performs diagnostics. Diagnostic methods:

1. X-ray. Can deep caries be seen on an X-ray? Yes, it is a darkened area of dentine near the pulp.
2. Pulp tests: cold, heat.
3. Percussion and palpation: tenderness when tapping may indicate pulp inflammation (1).

Is it possible to save a tooth with deep caries without removing the nerve?

In some cases, the nerve can still be saved.

When there is a chance to keep the nerve alive

This is possible if;

• the tooth is viable, the pulp responds to tests;
• There is no severe pain, night-time discomfort or swelling.

The doctor uses modern treatment methods (2): the use of bioactive materials (calcium hydroxide, MTA) that support pulp viability.

Thanks to these technologies, teeth can remain alive for many years.

When nerve removal is unavoidable

Unfortunately, it is not always possible to save the pulp. In such cases, the main thing is not to delay treatment. Timely removal of the affected nerve allows you to avoid complications and save the tooth itself.

Here are the main signs that nerve removal is necessary:

• there are signs of irreversible inflammation or necrosis of the pulp;
• the pulp does not meet the tests, periapical infection is observed;
• the patient is at high risk of complications due to their general health or the anatomical features of the tooth.

If there is deep caries under an old filling, sensitivity or pain has appeared, your dentist will advise you on what to do in this case. They will assess the condition of the tooth using an X-ray, remove the caries using gentle methods to preserve the nerve, and carry out follow-up checks and preventive measures after treatment.

How to distinguish deep caries from pulpitis: diagnostic methods

Sometimes it is difficult for patients to understand what exactly is causing the pain: tooth decay or pulpitis.

A dentist can determine this during an examination:

• assesses the nature of pain and response to stimuli;
• conducts pulp tests, X-rays;
• checks sensitivity when pressed.

With deep caries, pain may be short-lived or absent, while with pulpitis, it may be intense and prolonged (1).

Modern methods of treating deep caries while preserving the nerve

Today, dentistry offers effective solutions, allowing the use of modern methods of treating deep caries without removing the nerve:

• pulp capping or partial pulpotomy (vital pulp therapy, VPT);
• bioactive materials: MTA, calcium hydroxide, bioceramics (3);
• Sealed restoration: provides reliable protection against bacteria.

Treatment times for deep caries: how many visits are usually needed to effectively preserve the nerve?

It depends on the complexity of the case, but usually takes 1–2 visits, sometimes with a temporary filling.

What are the chances of saving the nerve: factors for success

According to recent studies, with pulp capping or partial pulpotomy (vital pulp therapy, VPT), more than 96% of teeth remain alive even after 2 years.

Several factors influence success:

• early diagnosis;
• absence of severe pain;
• Gentle treatment method
• high-quality materials and airtight seal;
• the patient’s general state of health;
• anatomical features of the tooth.

After treatment: is it normal for my tooth to hurt?

It is normal for a tooth to hurt after treatment for deep caries.

It is normal for a tooth to be sensitive to cold or hot for a few days.

However, if the pain lasts longer than 1 week, or if swelling or a fistula appears, this may be a sign of complications. In this case, you must consult a doctor.

What will happen if the nerve is not removed when it was necessary?

If the nerve needs to be removed but treatment is delayed, the inflammation progresses to necrosis. This can lead to periapical infection, abscess formation, and even tooth loss.

Therefore, it is important to entrust your treatment to a professional dentist in a timely manner.

Dentist’s recommendations: how to increase the chances of saving the nerve

To reduce the risk of developing deep caries and increase the chances of preserving the nerve, it is worth following a few simple rules:

• brush your teeth twice a day, use dental floss or interdental brushes;
• undergo preventive medical examinations 1–2 times a year;
• limit sugar and snacks between main meals;
• follow the doctor’s recommendations after restoration;
• Do not delay your visit if you experience pain, swelling or a fistula.

List of sources:

1. PubMed — Survival outcomes of deep caries treatment https://pubmed.ncbi.nlm.nih.gov/
2. National Elf Service — Stepwise excavation preserves pulp https://www.nationalelfservice.net/
3. BMC Research Notes — Deep caries management with MTA: A prospective clinical study with one year follow up of deep caries management using a novel biomaterial. https://bmcresnotes.biomedcentral.com/