Composite fillings typically last about 5 to 10 years, and well-placed ones in low-stress areas can last longer. How long yours holds up depends on its size, where it is in your mouth, and how well you look after it.
Here’s what shortens or extends their life and how to tell when one needs attention.
What Affects How Long a Filling Lasts
Size of the filling. Small fillings tend to last longer than large ones, because large ones have to withstand more chewing force and have more edges where gaps can form.
Location in your mouth. Back teeth take far more pressure than front teeth, so fillings on molars wear faster.
Grinding or clenching. Constant pressure can chip or loosen a filling and wear it down early. A night guard can help protect it.
Oral hygiene. Plaque at the edge of a filling can cause new decay underneath it, which is the most common reason fillings fail.
Diet and habits. Frequent sugary or acidic foods, chewing ice, and biting hard objects all shorten a filling’s lifespan.
How it was placed. Composite is sensitive to moisture and technique during placement, so careful work makes a real difference.
Signs a Filling Needs Replacing
- Sensitivity to hot, cold, or sweet that wasn’t there before
- A rough or sharp edge you can feel with your tongue
- A visible crack, chip, or gap around the filling
- Dark staining around the edges
- Food that keeps getting stuck in the same spot
- Pain when you bite down
Many of these are caught at routine checkups before you notice them. If a filling does need replacing, doing it early is simpler and often cheaper than waiting for decay to spread.
How to Make Your Fillings Last Longer
- Brush twice a day and floss daily, paying attention to the edges of fillings
- Limit sugary snacks and acidic drinks
- Avoid chewing ice, pens, and hard candy
- Wear a night guard if you grind your teeth
- Keep up with checkups and cleanings
- Replace worn fillings before they fail
Who Should Pay Closer Attention
People with large fillings on molars are most likely to need replacement sooner, and may be better served by a crown if too much of the tooth is gone.
Anyone who grinds their teeth puts extra stress on every restoration in the mouth.
Those with dry mouth or frequent snacking habits have less natural protection against new decay around fillings.
If you’re thinking about the cost of replacing one, our guide to how much a cavity filling costs covers what to expect. You can also see how we place them on our composite fillings page.
FAQ
Do composite fillings last as long as silver fillings?
Silver fillings often last a bit longer on average, but composite fillings look natural and bond to the tooth, and many last a long time with good care.
Can a composite filling fall out?
Yes, especially if decay forms underneath or the filling is subjected to heavy pressure. Call your dentist if one comes loose.
Does a composite filling stain?
It can stain over time, especially with coffee, tea, and tobacco, though less than most people expect.
How do I know if decay is forming under my filling?
You might notice sensitivity or pain, but often only an X-ray shows it, which is why regular checkups matter.
Can an old filling be repaired instead of replaced?
Sometimes, for small chips or worn edges. Larger problems usually call for replacement.
Think One of Your Fillings Is Wearing Out?
Catching a failing filling early keeps a small repair from turning into a big one. Summer Smile Dental in South Gate can check your fillings and replace any that need it. Schedule a checkup today.