Tooth Coloured Fillings vs. Old Amalgam: Should You Replace Yours?

If you've got older metal (amalgam) fillings from years ago, you may be wondering whether it's worth replacing them with modern, tooth-coloured composite fillings. Here's how the two compare, and what actually determines whether replacement makes sense.

What's the Difference?

Amalgam fillings are made from a mix of metals and have a distinctive silver-grey appearance. They've been used in dentistry for well over a century because they're durable and cost-effective. Tooth-coloured (composite resin) fillings are matched to the natural shade of your tooth, making them far less noticeable, and they bond directly to the tooth structure rather than simply filling a cavity space.

Aesthetics: The Most Obvious Difference

The most immediate reason people consider switching is appearance — composite fillings blend in with surrounding teeth, while amalgam fillings are visibly dark, especially on front teeth or teeth visible when smiling or talking.

Does an Old Filling Automatically Need Replacing?

Not necessarily. If an amalgam filling is intact, isn't causing pain, and shows no signs of cracking, leaking, or decay underneath, it may not need to be replaced purely for cosmetic reasons — that's a personal choice rather than a clinical necessity. However, there are situations where replacement is genuinely recommended:

• Visible cracks or wear in the filling itself
• Decay developing underneath or around the existing filling
• A filling that's lifted, leaked, or no longer sealing the tooth properly
• Sensitivity or discomfort associated with the filling

Strength and Durability Considerations

Amalgam has historically been considered very durable for large fillings, particularly in back teeth that handle heavy chewing forces. Composite materials have improved significantly and are now used confidently across most situations, though your dentist can advise on the best material for a specific tooth's size, location, and chewing load.

What Replacement Involves

If replacement is recommended, the process involves removing the old filling material, checking the tooth underneath for any decay that may have developed, and placing a new composite filling matched to your natural tooth shade.

Deciding What's Right for You

Whether to replace an old amalgam filling really comes down to its current condition and your own preferences around appearance. The best first step is having your existing fillings properly assessed, rather than assuming they either definitely need replacing or definitely don't.

Book an Assessment in Bentley

If you'd like your existing fillings checked or want to discuss switching to tooth-coloured composite, our team can assess your teeth and talk through your options. Visit us at Shop FS6B, 1140 Albany Hwy, Bentley WA 6102, or contact us today to book an appointment.

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