Pulp (Dental Pulp)

What Does Dental Pulp Do

The pulp plays two main roles.

• During childhood and adolescence, it drives tooth development. The blood vessels supply nutrients that help the tooth grow and the surrounding structures form properly.
• Once a tooth is fully developed, the pulp's primary role becomes sensory. The nerves inside it allow you to feel temperature, pressure, and pain — signals that something may be wrong with the tooth.

This is why an untreated cavity eventually starts to hurt. As decay progresses deeper into the tooth, it gets closer to the pulp. Once bacteria reach it, the pulp becomes inflamed and infected — and that is when the pain becomes difficult to ignore.

Where Is the Pulp Located

The pulp occupies two connected spaces inside the tooth:

• The pulp chamber — the larger central space inside the crown (the visible part of the tooth)
• The root canals — narrow tunnels that run through each root, from the pulp chamber down to the tip of the root

The number of root canals varies by tooth. Front teeth typically have one. Back teeth can have two, three, or more. This is why root canal treatment on a molar is more involved than on a front tooth — there are more canals to locate, clean, and seal.

What Happens When the Pulp Is Damaged

The pulp can become inflamed or infected for several reasons:

• Deep decay that reaches the center of the tooth
• A crack or fracture that allows bacteria to enter
• Repeated dental procedures on the same tooth over many years
• A knock or trauma to the tooth, even without visible damage

When the pulp is inflamed, the condition is called pulpitis. In its early stage, this may cause sensitivity to hot or cold that lingers after the temperature source is removed.

Left untreated, the inflammation progresses to infection — and at that point the pulp tissue begins to die.

A tooth with a dying or dead pulp does not always cause obvious pain. Some patients are unaware there is a problem until a routine X-ray reveals it or a dental abscess develops.

How Is a Damaged Pulp Treated

When the pulp is infected or irreversibly inflamed, it cannot heal on its own. There are several treatment paths:

• Root canal treatment

  The infected pulp is removed, the canals are cleaned and shaped, and the space is sealed with a filling material. The tooth is then restored — usually with a crown on back teeth. The tooth remains in place and continues to function normally. Root canal treatment is performed by a Specialist Endodontist.

• Extraction

  If the tooth cannot be saved — due to a severe fracture, extensive bone loss, or structural failure — it may need to be removed. Replacing a missing tooth is always worth discussing, as gaps affect bite function and the surrounding teeth over time.

• Pulp Therapy

  In children, the approach is different. If a baby tooth's pulp is partially affected, a pulpotomy — removal of the affected pulp tissue only — may be performed to preserve the tooth until it falls out naturally. If the entire pulp is affected, a pulpectomy is carried out instead.