Composite vs amalgam fillings: questions that help you choose
When you need your first filling, composite (tooth-colored) and amalgam (silver) are two common options with different appearances, placement methods, and longevity. Learn what to ask your dentist to make the right choice for your situation.
Medically reviewed by Dr. Jose, DDS — August 30, 2026
What’s the difference between composite and amalgam fillings?
When you need a filling to repair a cavity, your dentist may offer you a choice between two main materials:
Amalgam (also called silver fillings) contains a mixture of metals, including mercury, tin, copper, and silver. These fillings are durable and have been used safely in dentistry for over 150 years.
Composite (also called tooth-colored or resin fillings) is made from a plastic-like material that bonds directly to your tooth. These fillings match the color of your natural tooth.
Appearance: does it matter to you?
The most obvious difference is how they look. Amalgam fillings are silver and visible when you smile or open your mouth wide. If a filling is on a back tooth (molar or premolar), you may rarely see it. If it’s on a front tooth or the side of a tooth that shows when you talk, you might prefer composite for cosmetic reasons.
Composite fillings blend with your tooth color, making them less noticeable. This can feel more natural if appearance is important to you.
How is each one placed?
Amalgam placement is generally faster. Your dentist removes the decayed part of the tooth, prepares the space, and packs the amalgam material in. The filling hardens quickly and can handle bite forces right away.
Composite placement takes a bit longer. After removing decay, your dentist applies the composite in layers, curing (hardening) each layer with a special light. The composite bonds directly to your tooth. You may need to wait a short time before chewing on the tooth.
Durability and longevity
Both materials can last many years. The actual lifespan depends on:
- The size and location of the filling
- How much force your bite puts on it
- How well you care for your teeth (brushing, flossing, regular checkups)
- Your diet (very hard or sticky foods can stress fillings)
Your dentist can give you a realistic estimate for your specific tooth and situation.
Questions to ask your dentist
To make the best choice for you, consider asking:
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Which material do you recommend for my tooth, and why? Your dentist knows the location, size, and how much chewing force the tooth will endure. They can advise based on your specific cavity.
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How long does each filling typically last in your experience? Dentists see real-world results and can share what they’ve observed.
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Are there any reasons I shouldn’t choose composite (or amalgam) based on my tooth or mouth? Some situations favor one material over the other.
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What does the placement process feel like, and how long will it take? Understanding the procedure helps you feel more prepared.
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If this filling needs to be replaced later, what happens? Ask whether a new filling can use the same or a different material.
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Can I see the area and your x-rays? Understanding exactly where and how large the cavity is helps you make an informed decision.
Special considerations
If you have a larger cavity or your dentist suggests the tooth may need more extensive repair in the future, ask whether a filling is the best long-term option or whether a crown might be worth considering. (See our guide on do I really need a crown? for more on that decision.)
If you already have old amalgam fillings and are wondering whether to replace them, that’s a separate conversation — see our guide on should I replace my silver amalgam fillings? for details.
How MediMouth helps
Choosing between composite and amalgam is a personal decision based on your cosmetic preferences, the location of your tooth, and your dentist’s clinical recommendation. If you’re unsure which dentist to see or want a second opinion, MediMouth can help you find a trusted provider in our Arizona network. Your dentist is your best resource for weighing the pros and cons for your unique situation.
Frequently asked questions
Is one filling material safer than the other?
Both composite and amalgam fillings are considered safe by the American Dental Association when placed correctly. Your dentist can discuss any personal health considerations with you during your visit.
How long do fillings last?
Both materials can last many years with good oral care. The exact lifespan depends on the size and location of the filling, how well you brush and floss, and your bite. Your dentist can estimate longevity based on your situation.
Will my insurance cover either type?
Coverage varies by plan. Contact your insurance provider directly, and ask your dentist's office to help verify what your plan covers for each material.