What is affected?
The soft tissue inside the tooth.
← All explanationsPulp necrosis
What does a “dead tooth nerve” mean?
Pulp necrosis means that tissue inside a tooth has died. It affects the pulp, which contains nerves, blood vessels and connective tissue, rather than just one nerve. Decay or an injury may precede it. The tooth may initially be painless; diagnosis requires several findings.
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Tissue inside the tooth has died
The pulp contains the tooth’s blood vessels and nerves. Severe damage, for example from deep decay or trauma, can cause this tissue to die.
No pain does not mean all is well
A necrotic pulp usually does not respond to cold. A single cold test cannot prove this, especially soon after a dental injury.
Assess the whole tooth
Examination, comparison tests and X-rays when indicated help establish the diagnosis. Root canal treatment is often considered when the affected tooth can be retained.
At a glance
How is it noticed?
Sometimes through symptoms or discolouration, sometimes only on examination.
What happens next?
The cause and options for retaining the tooth are assessed individually.
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Often confused
Pulpitis or pulp necrosis?
Pulpitis means inflamed pulp tissue; necrosis means dead tissue. Symptoms may overlap or be absent. These terms are not a basis for self-diagnosis.
Quick answers
Does the tooth always hurt?
No. Symptoms may be absent or develop when tissue around the root becomes inflamed. Being pain-free is not a substitute for examination.
Can the colour tell us?
A tooth may change colour after an injury, but discolouration has other causes too. Colour alone cannot reliably show whether the pulp is alive.
Does the tooth have to be removed?
Not automatically. Restorability, root development, infection and remaining tooth structure determine the options. Root canal treatment can help retain suitable teeth.
At the practice
For your consultation
A question to discuss with Dr. med. dent. Niusha Barahmand Pour:
Which findings suggest damage to my tooth’s pulp, and how can we assess whether the tooth can be retained?
Symptoms, examination findings and personal wishes form the basis of individual treatment planning.
A previously injured or discoloured tooth can be examined specifically.
Have the tooth assessedChoose an appointment on DoctolibLearning for dental trainees & teamsUnderstand clinical terms and build your knowledge
Build on the simple explanation with clinical terms, key distinctions and a knowledge question.
- Pulp
- Soft tissue containing blood vessels, nerves and connective tissue inside the tooth.
- Necrosis
- Death of tissue.
- Sensibility
- Response to a stimulus; a cold test assesses a nerve response.
Know the difference
A cold response tests sensibility, not blood flow directly. Pulpal and apical diagnoses are established separately.
Sources and context
Editorial research: 23 October 2026. This explanation covers general principles and does not replace a personal examination. Suitable treatment is discussed following individual assessment.