If you have older silver-colored fillings, you may be weighing whether to leave them alone or have them replaced — and if you do, how it can be done carefully. This guide explains amalgam, the terms you'll run into, and what "mercury-safe" removal involves, so you can have an informed conversation with a dentist. It's educational background only; decisions about your fillings should be made with a licensed dentist who has examined your teeth.
What are mercury amalgam fillings?
Dental amalgam is a filling material that has been used for more than a century. It combines several metals — silver, tin, copper, and mercury — into a hard, long-lasting filling. Many fillings placed decades ago are amalgam, which is why they look silver or dark grey rather than tooth-colored. Amalgam remains a legal, widely used material, and regulatory bodies continue to review its use over time.
"Mercury-free" vs "mercury-safe" — what's the difference?
These two terms are easy to confuse, but they describe different things:
- Mercury-free means a practice does not place new amalgam fillings — it uses tooth-colored materials instead.
- Mercury-safe means a practice follows specific precautions when removing existing amalgam, to reduce exposure to mercury vapor and particles during the procedure.
A practice can be one, the other, or both. If removal matters to you, it's the "mercury-safe" protocols that are most relevant. For a deeper treatment of this distinction, MercuryFreeDental.com covers it in detail.
What does mercury-safe removal involve?
The most widely referenced set of removal precautions is the SMART protocol (Safe Mercury Amalgam Removal Technique), developed by the International Academy of Oral Medicine and Toxicology (IAOMT). Practices following it typically combine:
- Rubber dam isolation of the tooth
- High-volume suction near the filling
- Supplemental air or oxygen for the patient
- Additional room air filtration
- Protective coverings for patient and staff
- Sectioning the filling to remove it in larger pieces rather than grinding it away
These are procedural precautions used during the appointment. Whether they're appropriate for you is a question for your dentist.
Should you have your amalgam fillings removed?
People consider replacing amalgam fillings for different reasons — a filling may be worn, cracked, or leaking, or a patient may simply prefer tooth-colored materials. Removing a sound filling is a decision with its own trade-offs. A dentist can examine each filling and discuss whether replacement is warranted, and what would replace it. If you do move ahead, our companion note on choosing a biological dentist can help you find a practice whose approach fits.
Choosing a replacement material
If a filling is replaced, several tooth-colored options exist, and they differ in durability, appearance, and cost. Because material choice is individual, it's worth discussing with your dentist; DentalMaterialGuide.org offers a patient-friendly comparison of the options and their biocompatibility.
Frequently asked questions
Is it safe to have mercury fillings removed?
Removal is a routine dental procedure. Some dentists use added precautions (the SMART protocol) to limit mercury exposure during removal. Whether removal is advisable for you is an individual question for a licensed dentist.
What's the difference between mercury-free and mercury-safe dentistry?
Mercury-free means a practice places no new amalgam fillings. Mercury-safe means it follows precautions when removing existing amalgam. A practice can be both.
How much does amalgam removal cost?
It depends on the number of fillings, the replacement material, and the practice. Ask for an itemized estimate, and check what your insurance covers.
What is the SMART protocol?
A set of removal precautions developed by the IAOMT — isolation, suction, filtration, protective coverings, and sectioning the filling — intended to reduce mercury exposure during removal.
Where can I find a mercury-safe dentist?
You can search verified mercury-safe and holistic practices in our directory and filter by location.