For decades, metal (amalgam) fillings were the go-to solution for treating cavities. They’re durable and long-lasting—but as dental technology advances, so does our understanding of their potential risks. A 2016 study found that individuals with more than eight amalgam fillings had higher levels of mercury in their blood, raising valid concerns about the long-term safety of these restorations.
If you still have silver fillings, it may be time to consider replacing them with modern, tooth-colored alternatives that are both safer and more natural-looking.
Understanding Metal Fillings and Their Risks
Traditional metal fillings are made from a mixture of metals, including silver, tin, copper, and mercury. Mercury is used because it helps bind the other metals together to create a strong, durable filling material. However, over time, these fillings can release trace amounts of mercury vapor—especially during chewing or teeth grinding.
While the amount released is typically low, repeated exposure may contribute to higher mercury levels in the body. The 2016 study highlighted that participants with multiple amalgam fillings showed measurable increases in mercury concentration in their bloodstream, suggesting potential long-term health implications. The U.S. Food and Drug Administration (FDA) has also advised that certain individuals—such as pregnant women, children, and people with specific health conditions—may face greater risks from mercury exposure.
Beyond health concerns, amalgam fillings can also cause practical issues. Metal expands and contracts with temperature changes, which can lead to small cracks in the surrounding tooth structure over time. These tiny fractures can make the tooth more susceptible to decay, breakage, or sensitivity.
The Advantages of Tooth-Colored Fillings
Tooth-colored (composite) fillings offer a more advanced, aesthetically pleasing, and biocompatible solution for repairing cavities. Made from a blend of durable resin and fine glass particles, these restorations bond directly to your enamel, providing both strength and a seamless appearance.
Some of the key benefits of replacing metal fillings with tooth-colored ones include:
- A natural appearance – Composite fillings blend perfectly with your natural teeth, eliminating the dark, metallic look of silver fillings.
- Mercury-free materials – Composite resin contains no mercury, reducing potential health risks for patients who are sensitive to or concerned about metal exposure.
- Better preservation of tooth structure – Unlike metal fillings, which require removing more of the natural tooth to stay in place, composite fillings bond directly to enamel, preserving more of your healthy tooth.
- Less sensitivity to temperature – Because composite resin doesn’t expand or contract like metal, it’s less likely to cause cracks or discomfort when exposed to hot or cold foods.
- Durability and longevity – Modern composite materials are strong, long-lasting, and ideal for both front and back teeth.
When to Replace Your Metal Fillings
Not everyone needs to have their metal fillings replaced immediately, but there are certain situations when doing so is recommended. You should talk to your dentist about replacement if:
- You have several large or worn-down amalgam fillings
- Your fillings are causing cracks, discoloration, or tooth sensitivity
- You experience a metallic taste or irritation near your fillings
- You want to improve the appearance of your smile
Replacing metal fillings is a straightforward procedure. Your dentist will carefully remove the old material, clean the area to eliminate any residual mercury or decay, and restore your tooth with a natural-looking composite filling. In some cases, more extensive restorations like onlays or crowns may be used for added strength.
The Long-Term Benefits of Making the Switch
Upgrading from metal to tooth-colored fillings offers both cosmetic and health advantages. You’ll enjoy a more uniform, confident smile and peace of mind knowing your restorations are made from safe, modern materials. Plus, composite fillings support the long-term integrity of your teeth, helping prevent cracks and decay down the road.
A simple replacement can go a long way toward improving your overall oral health and the appearance of your smile.
About the Practice
Baltimore Dental Arts provides advanced restorative and cosmetic dentistry designed to keep smiles healthy and beautiful. Our experienced team offers tooth-colored fillings, dental crowns, and other modern treatments using safe, biocompatible materials.
Call us at (410) 372-0202 or request an appointment online.