Silver-coloured metal fillings, also known as amalgam fillings, have been used in dentistry for over 150 years. They're durable, affordable, and long-lasting. But in recent years, they’ve been at the centre of growing concern—mostly due to one ingredient: mercury.
So, should you be worried about your old metal fillings? Let’s break down the facts:
The fear: “Mercury fillings are poisoning me!”
It’s true—mercury is toxic in high doses. That fact alone has sparked plenty of alarming headlines and even calls for a complete ban. Some of the common claims include:
- “Mercury leaks into my body!” – Yes, but only in very small amounts (often less than from eating seafood).
- “Europe is banning them!” – Some countries are limiting their use, but mainly for environmental—not health—reasons.
- “They cause Alzheimer’s or autism!” – There is no credible scientific evidence linking amalgam fillings to these conditions.
These fears have led to a booming “mercury removal” industry—often driven more by misinformation than by dental necessity.
The reality: What science and dental experts say
Major health authorities around the world agree that amalgam fillings are safe for most people:
- FDA (US) – Safe for adults and children over the age of 6
- ADA (Australian & American Dental Associations) – No evidence they cause harm
- WHO (World Health Organization) – Mercury exposure from fillings is far below toxic levels
Why are amalgam fillings considered safe?
- The mercury is chemically bound with other metals, making it stable
- You’d need hundreds of large fillings to reach harmful levels
- Ironically, removing amalgam can release more mercury than leaving it in
Should you replace your metal fillings?
You might consider replacing them if:
• The filling is cracked, leaking, or worn down
• There is new decay underneath the filling
• You have a confirmed mercury allergy (extremely rare)
• You prefer a more natural, tooth-coloured appearance
Studies on large groups of people who had amalgam fillings removed and replaced with other materials have not shown measurable health improvements.
What about composite fillings?
Many patients now opt for composite (white) fillings—and for good reason.
Pros:
✔ Mercury-free
✔ Matches your natural tooth colour
✔ Bonds directly to the tooth and usually requires less drilling
Cons:
✖ Slightly less durable for large fillings
✖ May need replacement sooner
✖ May not adhere well to all areas of the tooth, increasing the risk of future leakage and decay
The bottom line
If your metal fillings are in good condition and not causing any problems, there’s usually no reason to remove them. However, if you’re interested in mercury-free alternatives or want to update old fillings for aesthetic reasons, that's a personal and valid choice.
At Creswick Dental Centre, we're happy to talk through your options - whether it's maintaining your current fillings, switching to composite or ceramic alternatives, or simply answering your questions.
Book your consultation today or get in touch to learn more about composite fillings in Creswick.