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If you grew up before tooth-colored fillings became the standard, chances are you’re carrying a few silver ones. Amalgam fillings were the workhorse of dentistry for over a century, and many have served faithfully for decades. So should they come out? The honest answer: not automatically — but there are clear signs an old metal filling has reached the end of its useful life, and replacing it at the right time protects the tooth around it.

Key Takeaways

  • A sound, intact amalgam filling doesn’t need to be replaced just because it’s metal — replacement is about condition, not material.
  • Old fillings fail at the margins: gaps open between filling and tooth, letting bacteria leak underneath where decay grows unseen.
  • Metal doesn’t bond to teeth and expands and contracts with temperature, which can stress and crack the surrounding tooth over decades.
  • Modern composite restorations bond directly to the tooth, require less drilling, strengthen what remains, and match your natural color.
  • The best way to know is an exam — AI-assisted X-ray screening is particularly good at spotting leakage under old fillings.

How Silver Fillings Age

Amalgam is durable, but it has two long-term weaknesses. First, it doesn’t bond to the tooth — it’s packed into place and held mechanically, so as the filling ages, microscopic gaps open at the edges. Bacteria slip into those gaps and cause decay underneath the filling, where you can’t see it and often can’t feel it until it reaches the nerve.

Second, metal expands and contracts with hot and cold far more than tooth structure does. Over thousands of coffee-then-ice-water cycles, that movement acts like a tiny wedge. It’s why we so often find cracks radiating from the corners of large, old amalgams — and why some of those teeth eventually need crowns rather than simple fillings.

Signs It’s Time

Bring an old filling to our attention if you notice sensitivity to temperature or biting around it, a dark shadow in the surrounding tooth, a rough or raised edge your tongue keeps finding, food catching around it, or visible cracking in the filling or the tooth. And sometimes there are no symptoms at all — which is why old fillings are checked at every dental exam, where our Pearl AI screening is particularly good at flagging the early shadows of leakage on X-rays.

A quick word on safety, since patients often ask: leading dental and health organizations consider intact amalgam fillings safe for most adults. Our reasons for replacement are structural and cosmetic — a failing filling, a cracking tooth, or a smile you’d like to be metal-free — not alarm about the material itself.

What Replacement Looks Like

Metal filling replacement in Beverly Hills is a careful, methodical procedure. The old amalgam is removed under high-volume suction and isolation, any decay underneath is cleaned out, and the tooth is restored with modern bonded composite — a material that chemically adheres to your tooth, reinforces the remaining structure, and disappears visually into your smile. Most replacements take a single visit per tooth.

If the old filling was large and the remaining walls are thin, an onlay or crown may be the sturdier choice; we’ll show you exactly what we see on the imaging and walk through the options together.

Get Them Checked, Not Guessed At

If your silver fillings are past their twentieth birthday — or you’ve simply never had them evaluated — request an appointment at Beverly Hills Cosmetic Dentistry. A short exam tells us which fillings are still doing their job and which ones are quietly costing you tooth structure. That’s a conversation worth having before a filling problem becomes a root canal problem.