How Long Do Tooth-Colored Fillings Last?

Most tooth-colored (composite) fillings last about seven to ten years, and many last longer with good oral hygiene and regular dental visits. How long do tooth-colored fillings last for you? That depends mostly on the filling’s size, where it sits in your mouth, and everyday habits like grinding or chewing hard foods.

At Bailey Family Dental in Whittier, we place durable tooth-colored composite fillings and check them at every visit so small problems are caught early. If a filling is wearing down, we would rather repair it while the tooth underneath is still healthy than wait for a cavity to form under it.

What Is the Average Lifespan of a Tooth-Colored Composite Filling?

On average, a tooth-colored composite filling lasts seven to ten years. That is a range, not a guarantee: a small filling on a tooth that does little chewing may last well over a decade, while a large filling on a molar that takes heavy biting force may need attention sooner. Silver (amalgam) fillings sometimes last a little longer, but many patients prefer composite because it matches the tooth and lets us remove less healthy structure.

The reassuring part is that a filling reaching the end of its life rarely fails all at once. At a routine dental checkup, we can usually spot wear, a chip, or a gap at the edge long before it becomes painful.

What Affects How Long a Filling Lasts?

Size and location of the filling

Small fillings last longer than large ones. A filling that replaces a big portion of the tooth has more surface exposed to chewing forces and temperature changes, so it flexes and wears more. Fillings on back molars absorb the most force and tend to wear faster than fillings on front teeth. When a cavity is very large, a filling may not be the best choice at all, and a crown protects the tooth better, which we explain in our guide to a large cavity filling vs. crown vs. root canal.

Your daily habits

Brushing twice a day and flossing keep decay from starting at the edge of a filling, which is the most common reason fillings fail. Grinding or clenching, chewing ice, and biting hard candy all shorten a filling's life. If you grind at night, a custom night guard can protect both your fillings and your natural teeth.

Decay around the filling

A filling itself cannot get a cavity, but the tooth around and under it still can. When decay forms at the margin, the filling has to be replaced, and the new one is usually a little larger. Catching this early keeps the repair small, which is one more reason regular cleanings, exams, and early cavity treatment matter.

How Do I Know When a Filling Needs Replacing?

Signs a filling may be wearing out include new sensitivity to hot, cold, or sweet foods, a rough or sharp edge you can feel with your tongue, visible cracks or staining, or a piece that has chipped away. Sometimes there are no symptoms at all and we simply see it on an exam or X-ray. If a filling ever comes out completely, treat it as a small emergency and call us. Here is what to do if you lose a filling or crown. Our Can an Old Filling Leak or Fail? page explains how we evaluate an aging filling.

Can I Make My Fillings Last Longer?

Yes. The same habits that prevent cavities protect your fillings: brush twice daily with fluoride toothpaste, floss once a day, limit sugary and acidic drinks, and keep your regular cleanings and exams. Avoid using your teeth as tools, and wear a night guard if you grind. Some mild tooth sensitivity after a filling is normal at first, but pain that lingers for more than a couple of weeks is worth a look.

Tooth-Colored Filling FAQs

Which fillings last the longest?

Small fillings on teeth that take less chewing force last the longest, often well beyond ten years. Material matters less than size and location, and our Tooth-Colored Fillings vs Silver Fillings blog compares the two materials in detail.

Does a filling need to be replaced on a set schedule?

No. There is no fixed expiration date. A filling should be replaced only when it shows wear, decay at the edge, a crack, or lasting sensitivity. We check yours at every visit and recommend replacement only when the tooth needs it.

Is it bad to wait if an old filling does not hurt?

Sometimes. A worn or leaking filling can let decay spread underneath without pain until it reaches the nerve. That is why we watch older fillings closely, since replacing one early is far simpler than treating a deep cavity or needing a root canal later.

Related Filling Resources

• Tooth-Colored (Composite) Fillings
• Cavity Treatment in Whittier
• Cavity Under a Filling or Crown
• Large Cavity: Filling vs. Crown vs. Root Canal
• What To Do If You Lose a Filling or Crown
• Signs You May Have a Cavity Even Without Pain

Reviewed by Brian Choi, DMD
General Dentist at Bailey Family Dental in Whittier, CA
Updated: October 2026