My Metal Fillings Work Great! Why Should I Replace Them?

August 29, 2026

Close-up of tooth with metal filling.

For decades, metal dental fillings, also called amalgam fillings, were commonly used to repair teeth damaged by cavities. While these fillings can be durable and may continue functioning well for many years, there are situations when your dentist may recommend replacing them. Modern tooth-colored fillings can provide an alternative that is both functional and more discreet.

They Can Become Damaged Over Time

No dental filling lasts forever. Over the years, a metal filling can become cracked, worn, or damaged. The tooth surrounding an older filling can also develop new decay or a crack.

If a filling is no longer providing an effective seal, bacteria can enter around it and potentially cause another cavity. During routine dental examinations, your dentist can check older fillings for signs of wear or deterioration and determine whether replacement is necessary.

Tooth-Colored Fillings Can Improve Your Smile

One of the most noticeable differences between traditional metal fillings and modern composite fillings is their appearance. Metal fillings can be visible when you laugh, talk, or open your mouth, while tooth-colored composite resin can be matched to the shade of your natural teeth.

If you have older fillings in noticeable areas of your smile, replacing them with tooth-colored restorations may provide a more seamless appearance.

Modern Fillings Can Preserve a Natural Appearance

Composite fillings can be bonded directly to the tooth and shaped to restore its natural contours. Depending on the size and location of the cavity, this approach can provide an attractive restoration while preserving healthy tooth structure.

However, the best material depends on the individual tooth and the extent of the damage. Your dentist can determine whether composite resin or another restorative material is appropriate.

Your Dentist Can Address Underlying Problems

Sometimes an older filling needs to be replaced because there’s a problem underneath or around it. Recurrent decay, a fractured tooth, or a compromised filling may require treatment to prevent the problem from becoming more serious.

Replacing a failing filling can restore the tooth and help protect it from additional damage.

Lots of Metal Fillings Could Affect Your Health

In 2016, researchers from the University of Georgia published a study that concluded that amalgam fillings significantly contribute to prolonged levels of mercury in the body. Mercury is a toxin that, at high levels, can damage vital organs including the brain, heart, lungs, and kidneys, plus the immune system.

These researchers went on to say that while one amalgam filling won’t likely harm your health, 8 or more of them increase the risk of harmful side effects. According to the study, 25 percent of the American population has 11 or more fillings.

If you have older metal fillings, ask your dentist whether they should be replaced. They can examine your teeth, look for signs of decay or damage, and explain whether tooth-colored fillings or another restoration would be appropriate for you.

About the Practice

Athens Dental Associates in beautiful Athens, GA has the modern answer to cavities with tooth-colored fillings. Say goodbye to the old-school metal fillings which were highly visible and posed risks to your oral health. These fillings can be customized to match the look of your natural teeth and preserve more of your natural tooth structure. Contact us online for more information and scheduling or call (706) 549-1370.