Most cavity fillings heal within a few days, though mild sensitivity can linger for up to two weeks. The timeline depends on the filling material, the depth of the cavity, and how your tooth responds to the procedure. Here’s what to expect at each stage.
The First Few Hours: Numbness and Setting
Local anesthetic typically wears off within about two hours, though it can take longer in some cases. As the numbness fades, you may notice a tingling sensation that gradually returns to normal feeling. During this window, be careful not to bite your cheek, tongue, or lip, since you can’t feel them properly.
How quickly your filling hardens depends on what it’s made of. Composite (tooth-colored) fillings are cured with a blue light during the procedure, so they’re fully set before you leave the chair. Ceramic fillings also harden immediately with light curing. Amalgam (silver) fillings are different: they reach an initial set within about an hour but don’t hit full strength for roughly 24 hours. That distinction matters when it comes to eating.
When You Can Eat Normally Again
With a composite filling, you can technically chew on it right away. Most dentists still suggest waiting one to three hours, not because the filling needs time, but because chewing while your mouth is numb is a recipe for accidentally biting yourself. Once sensation returns, you’re good to go.
If you received an amalgam filling, wait a full 24 hours before chewing on that side. Stick to soft foods on the opposite side of your mouth in the meantime. Regardless of filling type, it’s smart to avoid very hot, cold, or sticky foods for the first day or two while your tooth adjusts.
Sensitivity in the First Two Weeks
Some sensitivity to hot, cold, pressure, or sweet foods after a filling is completely normal. For most people, this fades within a few days. Metal fillings like amalgam tend to produce more cold sensitivity than composite fillings, and this can occasionally stretch out over a few weeks.
If sensitivity is still present after a couple of weeks but gradually improving, that’s generally not a concern. The deeper the cavity was, the closer the filling sits to the nerve inside your tooth, and deeper fillings tend to produce more sensitivity that takes longer to settle. A shallow filling on a tooth that hasn’t had previous work may feel perfectly normal within 24 hours.
Managing Discomfort at Home
The American Dental Association recommends combining ibuprofen and acetaminophen for dental pain relief. A common approach is 400 mg of ibuprofen (two standard pills) plus 500 mg of acetaminophen, taken together. Starting this about an hour after the procedure, or just before the anesthesia fully wears off, helps you stay ahead of any discomfort. Take each dose with water and some soft food to protect your stomach.
For most fillings, over-the-counter pain relief is only needed on the first day, if at all. A routine filling on a small cavity often causes no pain once the numbness wears off.
Signs Your Filling Needs Adjustment
One of the most common post-filling issues is a “high bite,” where the filling sits slightly taller than it should. Your dentist checks your bite before you leave, but it’s hard to gauge accurately while your mouth is numb. Once feeling returns, you may notice that one tooth hits before the others when you close your jaw.
A high filling can cause a chain of symptoms that get worse rather than better:
- Uneven bite: your teeth don’t fit together the way they normally do
- Pressure or dull ache: especially when chewing or biting down
- Sharp pain: a persistent or worsening pain when you bite
- Jaw soreness or headaches: from your jaw muscles compensating for the uneven contact
- Avoiding one side of your mouth: instinctively shifting food to the other side
If you notice these symptoms a day or two after the procedure, your filling likely needs a simple adjustment. This is a quick fix where the dentist shaves down the high spot, and it usually resolves the pain immediately.
When Pain Signals a Bigger Problem
If you’re still feeling pain after a week, especially pain when biting, opening your mouth, or pain that throbs on its own, contact your dentist. Sensitivity that hasn’t improved at all after two weeks also warrants a call.
In rare cases, a filling can irritate the pulp, the living tissue deep inside the tooth that contains the nerve. This is called pulpitis, and it’s more likely when the cavity was very deep, the tooth had already been through multiple procedures, or the tooth experienced trauma like a crack. Pulpitis can sometimes resolve on its own as the tooth calms down, but if pain is severe or persistent, your dentist may need to evaluate whether the nerve is still healthy.
Full Healing Timeline at a Glance
- 0 to 2 hours: anesthesia wears off, tingling fades to normal sensation
- First 24 hours: amalgam fillings reach full strength; mild soreness is common with any filling type
- 1 to 3 days: most sensitivity to temperature and pressure resolves
- 1 to 2 weeks: lingering sensitivity from deeper fillings or amalgam typically fades
- 2+ weeks: your tooth should feel completely normal; persistent symptoms at this point deserve a dental visit
For the average person with a straightforward composite filling on a moderate cavity, the tooth feels normal within a few days. Deeper cavities and metal fillings sit at the longer end of that range, but even then, you should notice steady improvement day over day.