Will I remain awake?
Yes. Local anaesthesia is not general anaesthesia.
← All explanationsDental nerve block
Why can one anaesthetic affect several teeth?
A dental nerve block places local anaesthetic near a nerve before its supply branches further. This can temporarily numb a larger area. The technique is often used in the lower jaw; you remain awake.
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A nerve supplies an area
A larger nerve branches to several teeth and tissues. Its supply territory follows anatomy and does not simply equal an entire side of the face.
Near the nerve
Medicine placed near the nerve temporarily inhibits signal transmission. It should not be injected directly into the nerve.
Extent is not the same as adequacy
Depending on the technique, the lip or tongue may also feel numb. This alone does not establish adequate anaesthesia of a tooth. The effect is checked before treatment.
Read the full explanation
A nerve supplies an area
A larger nerve branches to several teeth and tissues. Its supply territory follows anatomy and does not simply equal an entire side of the face.
Near the nerve
Medicine placed near the nerve temporarily inhibits signal transmission. It should not be injected directly into the nerve.
Extent is not the same as adequacy
Depending on the technique, the lip or tongue may also feel numb. This alone does not establish adequate anaesthesia of a tooth. The effect is checked before treatment.
Notes on the teaching images
- Fictional teaching illustration, not a patient case or treatment result.
At a glance
Does it numb all teeth?
No; it affects a particular supply territory.
Is a numb lip a sufficient test?
No. The effect at the tooth needs checking.
Knowledge in motion
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Silent educational film with German on-screen text and simplified teaching images. Not a patient case or a promised treatment outcome. The full English explanation is available as text.
Often confused
Nerve block or infiltration?
A nerve block acts near a larger supplying nerve. Infiltration is placed near an individual tooth and reaches smaller nerve branches. Both are local techniques; neither is automatically preferable in every situation.
Quick answers
Is a nerve block general anaesthesia?
No. It is a local technique and you remain awake. It temporarily inhibits pain signals from a particular nerve supply territory.
Why is it often used in the lower jaw?
Local bone structure can make it harder to reach a tooth using infiltration alone. Anaesthesia near the supplying nerve may then be appropriate. The choice depends on the tooth, procedure and individual circumstances.
Why does my lip or tongue feel different?
Depending on the nerve and technique, surrounding soft tissues may be affected as well as teeth. The areas and duration vary. Avoid accidental biting and follow the practice’s advice.
What if numbness lasts unusually long?
Report persistent or unusual symptoms to the treating practice. Duration varies, but a change in sensation lasting beyond what was expected should be assessed. Mention known allergies and previous reactions before treatment.
At the practice
For the appointment
You can bring this question to your appointment:
Which areas may feel numb, and when should I contact you if altered sensation persists?
You can discuss the effect, risks or previous experiences with local anaesthesia before treatment.
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- Supply territory
- An area from which a nerve carries sensory information.
- Inferior alveolar nerve
- A nerve of the lower jaw that provides sensation to the lower teeth, among other structures; a common target of a dental nerve block.
Make the distinction
A nerve block acts near a larger supplying nerve. Infiltration is placed near an individual tooth and reaches smaller nerve branches. Both are local techniques; neither is automatically preferable in every situation.
Sources and context
Editorial research: . General information, not an individual diagnosis or treatment recommendation. Teaching illustrations are simplified and do not depict a patient case.