How do I know when my filling needs to be replaced?

Your dentist checks filling margins at every exam and can often spot wear before you feel any symptoms. Signs to watch for include sensitivity when biting, a crack you can feel with your tongue, visible darkening around the filling, or food consistently catching in the same spot.

Can a filling last a lifetime?

Some fillings — particularly gold — can last 20 to 30 years or more. Most composite and amalgam fillings will eventually need replacement, but with good oral hygiene and regular checkups, you can maximize their lifespan.

Does the size of the cavity affect how long the filling lasts?

Yes. Larger fillings cover more tooth structure and are subject to greater stress. They tend to fail sooner than small fillings. Very large cavities may be better restored with an inlay, onlay, or crown rather than a filling.

What happens if I do not replace a worn filling?

A worn or cracked filling allows bacteria to enter the gap between the filling and the tooth, causing new decay underneath the restoration. This secondary decay can be more difficult to treat and may eventually require a crown or root canal.

Does grinding my teeth shorten the life of my fillings?

Yes. Bruxism (teeth grinding) puts significant force on fillings and can cause them to crack or wear down much faster than normal. A custom night guard can protect your fillings and extend their lifespan.

How Long Do Fillings Last? | Dental Learning Center

Quick Answer

Composite (tooth-colored) fillings typically last 7 to 10 years; amalgam (silver) fillings can last 10 to 15 years or more. Longevity depends on the size of the filling, the tooth's location, your bite forces, and how well you maintain your oral hygiene.

What You'll Learn

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How long they last

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Filling types compared

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Signs it needs replacing

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How to extend their life

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How Long Do Different Types of Fillings Last?

The material used for your filling significantly affects how long it will last. Your dentist will recommend the best option based on the tooth's location, the size of the cavity, and your bite.

Composite (tooth-colored) fillings: 7–10 years

Composite resin bonds directly to the tooth and looks natural, but it is more susceptible to wear from chewing forces than amalgam. Smaller composites in low-stress areas often last longer.

Amalgam (silver) fillings: 10–15+ years

Amalgam is highly durable and has been used for over 150 years. It is more resistant to wear but expands and contracts with temperature changes, which can eventually cause cracks in the surrounding tooth.

Gold fillings: 15–30 years

Gold is the most durable filling material and can last decades. It is rarely used today due to cost and aesthetics, but remains an excellent option for patients who grind their teeth.

Ceramic (porcelain) fillings: 10–15 years

Ceramic inlays and onlays are tooth-colored and highly resistant to staining. They are more durable than composite but require more tooth preparation.

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Signs Your Filling May Need Replacing

Fillings do not last forever. Watch for these signs that a filling may need attention: sensitivity or pain when biting, a crack or chip you can feel with your tongue, visible darkening around the filling margin, food getting caught in the same spot repeatedly, or a filling that feels loose or has fallen out. Your dentist checks filling margins at every exam and can often spot wear before you feel any symptoms.

Frequently Asked Questions

Questions About Your Fillings?

We check every filling at your regular exam. If something needs attention, we will let you know before it becomes a problem.

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Dental Fillings

Comfortable, tooth-colored fillings that restore your smile.

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When a filling is not enough, a crown protects the whole tooth.

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