Mouth Numbness after Filling After a dental filling, you can experience numbness in your mouth, this is usually because of the local anaesthetic. This feeling can be unpleasant if it lasts longer than necessary. Knowing why it happens, and how long this numbness usually lasts, and what to do if this does not go away and for almost any period of time will help in facilitating a better recovery following a dental procedure.
Why the numbness after a dental filling?
The treatment area will be numb as a result of local anaesthetic injection to block the nerve signals to the treated area so you should not feel any pain. This anesthesia is an anesthetic used to avoid pain during a procedure. Various kinds of anaesthetic, such as lidocaine, articaine and bupivacaine, are of differing durations and strengths, and the kind of anaesthetic used, could possibly influence the length of time numbness persists.
Key reasons for numbness:
- To reduce sensitivity in the area, a nerve block is applied.
- Dose and agent of anesthesia influence duration of numbness
- Its half-life in your system depends on your individual metabolism and general health
This lack of sensation may be felt in other structures adjacent to the treated tooth, such as the lips, cheeks, tongue, and gums.
How long will numbness last after a filling?
The numbness can last anywhere from a few hours to even throughout the day, and is affected by a number of variables such as the type of anaesthetic and the site of injection.
How Long Does Numbness Last After Filling A Tooth?
| Anaesthetic Type | Average Duration |
| Lidocaine | 2–4 hours |
| Articaine | 1–3 hours |
| Bupivacaine (long-lasting) | 4–8 hours |
Note: These are approximate times and can vary by individual.
What Are the Risks When Your Mouth Is Numb?
When you can’t feel your mouth, it’s important to be careful to avoid injury or issues.
Potential Risks Include:
Biting cheek or tongue: There is a diminished feeling in your mouth and you can bite down on a cheek or your tongue which will be painful.
Drooling: Difficulty controlling the muscles of your face may lead to an overproduction of saliva.
Burns: Drinking a really hot drink can cause burns before you even realise.
Difficulty speaking or swallowing: Temporary changes in muscle coordination caused by numbness.
What can be done to decrease numbness by a Dentist?
Numbness will wear off naturally, but there are things that can be done at the dental office to help expedite the process. Some dentists will give an injection only using a reversal agent that metabolizes the anaesthetic more rapidly. This can decrease duration of numbness greatly, especially with long acting anaesthetics.
Methods Available at Dental Practices
| Method | Mechanism | Safety Notes |
| Anaesthetic reversal injection (phentolamine mesylate) | Counteracts the local anaesthetic to restore nerve activity | Must be administered by a dentist |
If You Always Feel Numb, When Should You Call Your Dentist?
- In most cases, the numbness wears off after a few hours, however, there are situations in which it is recommended to give your dentist a call:
- Your filling was carried out more than 5–6 hours ago and the numbness has not worn off.
- A lot of swelling or pain beyond what you would expect
- Your foot feels tingly, numb, or it´s been 24 hours and you still can´t feel anything
- Signs of nerve injury or disease There are signs of nerve injury or disease.
There might be no problems, but your dentist should be the one to explore that area.
What Can I Do So I Don’t Get Numb That Long?
Dentists perform customised anaesthetic methods so you do not have to be “numb” for very long. Recovery time is largely determined by factors such as precise injection placement and the type of anaesthetic injected. A careful compliance with post-treatment guidance can also help regain normal sensation.
Prevention tips include:
- Doing everything your dentist told you to do after the fact
- Arranging a follow-up if numbness does not go away as expected
- Prevent pressure or injury to the treated site while sensation is diminished
Why is Pallara Dental your Ideal Dental Care Provider?
We are committed to ensure patient comfort and safety. Using the latest in anaesthetic techniques, our experienced staff will make your dental filling treatment pain-free with numbness wearing off as soon as possible. If necessary, as the procedure is ending, our dentists are prepared to look at and take care of any prolonged numbness you may still have, even offering reversal medications if indicated.
We know how frustrating it can be to experience residual numbness, and we do everything we can to help you recover as quickly as possible. Committed to individualised care, state of the art facilities and a gentle touch, Pallara Dental is the one you’ll trust with all of your dental needs.
Important FAQ’s
How long does it take for numbness to go away after getting a filling?
Numbness will usually last 1-4 hours, depending on the anaesthetic and individual factors like metabolism and area of injection.
Do dentists have any tricks to help speed up the loss of numbness?
Yes. 50 Dentists can give a reversal injection of phentolamine mesylate, which helps the anaesthetic to metabolize more quickly. 80
Is it bad that my mouth is still numb for 6 hours?
Yes, if tingling has not subsided by 5-6 hours, call your dentist, who may need to re-evaluate you just to be certain there is no untoward effect.
Is it normal to have tingling as the numbness subsides?
Yes, and tingling and a “pins and needles” type of feeling are typical symptoms that the anaesthetic is coming out of effect and nerve function has resumed.
Does extended loss of sensation mean I have damaged a nerve?
Less commonly, continued numbness beyond 24 hours may be a sign of nerve irritation or damage. If this happens, call your dentist right away.
Why are some people numb longer than others?
How long numbness lasts depends on the type of anesthetic and dosage, as well as individual metabolism and injection site.