Tooth Sensitivity After a Filling: What's Normal?

Had a filling recently and now your tooth feels a bit odd? That twinge with cold water or a tender spot when you bite down can catch you off guard. At Two Rocks Dental Care, we get asked about tooth sensitivity after filling treatment all the time, and the good news is that it's usually nothing to worry about.

This article will walk you through why sensitivity happens, how long it usually sticks around, and the signs that mean it's worth getting checked rather than waiting it out.

Why your tooth feels sensitive after a filling

Your tooth isn't just a hard little block. Underneath the enamel is a softer layer called dentine, and inside that sits the nerve. When a dentist cleans out decay and places a filling, that nerve can get a bit irritated, even when everything has gone well.

Think of it like a bruise. The tissue has been disturbed, so it reacts for a while before settling back down. This is especially true if the decay was deep or close to the nerve.

Other common reasons for sensitivity after a filling include:

• The tooth reacting to hot, cold, sweet or acidic food and drink while the nerve settles
• Mild tenderness when chewing, especially in the first few days
• A general "new filling" feeling as your bite gets used to the shape of the restoration

None of this means the filling has failed. It's simply your tooth healing after having work done on it.

Tooth sensitivity after filling when chewing

It's quite common to notice tooth sensitivity after filling when chewing, particularly in the first week. This can happen because the filling sits ever so slightly differently to your old tooth surface while your bite adjusts.

In some cases, a filling can end up just a touch too high. When that happens, your tooth takes more pressure than it should every time you bite down, which can make it sore or tender. If chewing on that tooth still feels uncomfortable after a week or two, it's worth having us take a quick look. Adjusting the height of a filling is usually a simple, straightforward fix done at the practice.

How long does sensitivity after a filling usually last?

This is one of the most common questions we hear, and it makes sense that people want a timeframe. As a general guide, mild sensitivity after a routine filling tends to settle within a few days to about two weeks. Deeper fillings, or ones placed closer to the nerve, can take a little longer, sometimes up to three or four weeks, to fully calm down.

If you're noticing tooth sensitivity after filling 2 weeks on, don't panic. As long as it's gradually improving and not getting worse, this still falls within what's considered normal healing. The key thing to watch for is the trend. Each day should feel a little better than the last, even if it's not perfect yet.

What normal healing feels like

• A quick, short zing to cold drinks or hot food that fades fast
• Mild tenderness when biting, especially in the first few days
• Sensitivity that is slowly easing rather than staying the same or worsening
• No swelling, fever or throbbing

If you want to ease things along at home, a toothpaste made for sensitive teeth can help, along with avoiding extremely hot or cold food and drink for a week or so. For discomfort, follow the directions on the pack for any over-the-counter pain relief, or ask your pharmacist what's suitable for you.

Signs your toothache after filling needs a check

Most sensitivity settles down on its own, but there are times when a toothache after filling is telling you something needs attention. It's worth booking a visit if you notice:

• Pain that is getting worse instead of better as the days go on
• Sensitivity or aching that hasn't improved at all after two to three weeks
• Sharp pain when you bite down that doesn't ease up
• Throbbing pain, especially if it wakes you up at night
• Visible swelling in your gum or face near the filled tooth
• A lingering ache to heat long after the trigger is gone

These signs can point to a few different things, such as a filling that needs a small bite adjustment, or in some cases a tooth that needs further treatment. We won't know which it is without seeing you, which is exactly why a check-up is the right next step rather than guessing at home.

If you ever develop spreading facial swelling, a fever, trouble breathing or swallowing, or bleeding that won't stop, treat that as an emergency and head to your nearest hospital emergency department straight away.

What we do when you come in

When you visit us about ongoing sensitivity, our team starts by asking about your symptoms and having a proper look at the tooth and the filling itself. We often check your bite to see if the filling is sitting a fraction too high, since this is one of the easiest things to fix and one of the most common causes of ongoing discomfort when chewing.

We'll always explain what we think is going on and talk through your options, with the pros and cons of each, so you understand what's happening and feel comfortable with the plan. You can read more about how we approach tooth-coloured fillings and what's involved in getting one done properly the first time.

If you're a new patient coming to see us about a filling from elsewhere, that's absolutely fine. Have a look at our new patients page for what to expect at your first visit, and feel free to read a bit more about our team before you come in.

We're a family-run practice based in Two Rocks, so locals from Yanchep, Two Rocks and right up Perth's northern coast don't need to drive all the way to Joondalup just to get a filling checked. If you're with HBF, HCF or nib, we're a preferred provider for these funds, which usually means a smaller out-of-pocket gap for you, though it's never free. We use HICAPS so most claims can be processed on the spot. For any work beyond a simple check, we'll always give you a written quote with item numbers so you can confirm your cover with your fund before going ahead.

Frequently asked questions

Is it normal to have sensitive teeth after a filling?

Yes. Some sensitivity after a filling is a normal part of healing, since the nerve inside the tooth has been disturbed during treatment. It usually settles within a few days to two weeks, though deeper fillings can take a bit longer.

How long should tooth sensitivity after a filling last?

Most mild sensitivity fades within one to two weeks. Deeper fillings may take three to four weeks to fully settle. The main thing to look for is steady improvement, not an exact number of days.

Why does my tooth hurt when I chew after a filling?

This is often because the filling is sitting slightly higher than the rest of your tooth, putting extra pressure on it every time you bite. A quick adjustment at the practice usually sorts this out.

What if my tooth is still sensitive after a filling after a month?

If sensitivity hasn't improved at all after three to four weeks, or if it's getting worse, it's time to have it checked. This doesn't always mean something has gone wrong, but it does need a proper look to find out why.

Can a filling cause ongoing tooth sensitivity?

It's uncommon for sensitivity from a routine filling to stick around permanently. Most cases settle down as the nerve heals. Results can vary from person to person, so if something feels off, it's always worth getting it looked at rather than waiting.

If your tooth is still giving you grief after a filling, or something just doesn't feel right, we're happy to take a look. Give Two Rocks Dental Care a call on (08) 9502 9040, or book an appointment online at a time that suits you. We're inside the Jupiter Health Two Rocks Medical Centre at 6 Constellation Entrance, Two Rocks, with our own dental entrance and parking right outside.