What Are Silver (Amalgam) Fillings?

Silver fillings — clinically known as dental amalgam — have been used in dentistry for over 150 years. Despite the name, they're not purely silver. Amalgam fillings are composed of a mixture of metals including mercury, silver, tin, and copper.

How Silver Fillings Work

When a dentist places an amalgam filling, the liquid mercury is mixed with a metal alloy powder to create a pliable material that hardens inside the cavity. While this material is durable and cost-effective, it comes with a number of significant drawbacks that have led many modern dental practices — including W Plus Dental — to move away from it entirely.

The Downsides of Amalgam Fillings

• Visible appearance: Amalgam fillings are dark gray or silver-colored, making them highly noticeable when you smile, laugh, or speak.
• Mercury content: Amalgam contains roughly 50% mercury by weight. While the FDA considers low-level exposure from fillings to be safe for most adults, certain groups — including pregnant women, children under 6, and people with kidney conditions — are advised to avoid them.
• Tooth structure removal: To place an amalgam filling, dentists must remove more healthy tooth structure than is necessary for composite fillings, as the material doesn't bond directly to the tooth.
• Expansion and contraction: Metal fillings expand and contract with temperature changes (from hot and cold foods), which can stress the surrounding tooth over time and lead to micro-cracks.
• Galvanic sensitivity: Some patients report sensitivity or a metallic taste, particularly when different metals in the mouth interact.

What Are White (Composite) Fillings?

White fillings — formally called tooth-colored composite resin fillings — are made from a blend of fine glass or quartz particles embedded in a resin (plastic-like) base. They come in a wide range of shades that your dentist can match precisely to the color of your natural teeth, making them virtually invisible.

How White Fillings Work

Composite resin is applied in thin layers directly into the cleaned cavity. A special curing light is used to harden each layer. Because composite bonds chemically to the tooth structure itself, the filling holds securely without the need to remove additional healthy enamel. The result is a restoration that is both functional and cosmetically seamless.

The Advantages of Tooth-Colored Composite Fillings

• Natural appearance: The biggest advantage is aesthetic — white fillings match the shade, texture, and translucency of your real teeth. No one will know you have a filling.
• Bonding to natural tooth structure: Composite bonds directly to the tooth, which means less drilling and more preservation of your healthy enamel.
• No mercury: Composite fillings are completely metal-free, making them a safe choice for patients of all ages, including children and pregnant women.
• Temperature stability: Unlike metal, composite resin doesn't expand or contract significantly with hot and cold temperatures, reducing the risk of tooth fracture over time.
• Versatility: In addition to cavities, composite resin can be used to repair chipped teeth, close small gaps, and reshape teeth — making it a multi-purpose cosmetic and restorative tool.

White Fillings vs. Silver Fillings: Side-by-Side Comparison

• Silver (Amalgam) Fillings
  
  • Appearance: Dark gray / metallic
  • Mercury content: Yes (~50%)
  • Tooth structure removed: More
  • Bonding to tooth: Mechanical (no chemical bond)
  • Temperature sensitivity: May cause micro-cracks over time
  • Best for: Large back-molar cavities
• White (Composite) Fillings
  
  • Appearance: Matches natural tooth color
  • Mercury content: No
  • Tooth structure removed: Less
  • Bonding to tooth: Chemical bond
  • Temperature sensitivity: Stable
  • Best for: Front and back teeth, all cavity sizes

Why W Plus Dental in Washington, DC Uses Only Tooth-Colored Fillings

At W Plus Dental, we are committed to providing our patients with modern, mercury-free dental care that prioritizes both your health and your confidence. We believe every patient deserves a restoration that looks and feels completely natural.

Our Philosophy: Healthy Teeth, Beautiful Smiles

We chose to offer only composite resin fillings because they align with our core values: minimal intervention, maximum preservation, and outstanding aesthetics. When you visit our Washington, DC office, you can trust that every restoration we place is designed to blend with your smile — not stand out from it.

Metal-Free Dentistry for the Whole Family

Because composite fillings contain no mercury or metal, they are a safe, worry-free choice for patients at every stage of life — from young children getting their first filling to adults and seniors managing their long-term oral health.

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Should You Replace Your Old Silver Fillings?

If you have old amalgam fillings, you may be wondering whether it's time to replace them. The answer depends on a few key factors — and our team at W Plus Dental can help you evaluate them.

Signs Your Silver Fillings May Need to Be Replaced

• Visible cracks or fractures in or around the filling
• Sensitivity or pain when biting, chewing, or consuming hot or cold foods
• Darkening or discoloration of the surrounding tooth
• The filling is old or worn (amalgam fillings typically last 10–15 years)
• New decay forming at the edges of an existing filling
• Cosmetic concerns — you simply don't want a visible dark filling anymore

What Happens During a Silver Filling Replacement?

Replacing an amalgam filling with a composite one is a routine procedure at W Plus Dental. Here's what to expect:

1. Examination and X-rays: We assess the condition of your existing fillings to determine which ones should be prioritized.
2. Safe removal: Your old amalgam filling is carefully removed using protective protocols.
3. Cleaning the cavity: Any decay or damaged tooth structure is cleared away.
4. Composite placement: The tooth-colored resin is applied in layers, shaped, and hardened with a curing light.
5. Bite check and polish: We ensure your bite feels natural and the restoration looks flawless.

Most replacements are completed in a single visit and require only local anesthesia.

Is Replacing Silver Fillings Worth It?

For many patients, yes — especially if your amalgam fillings are old, showing signs of wear, or causing cosmetic concerns. Replacing aging silver fillings before they crack or leak can help prevent more serious (and expensive) dental work down the road, such as root canals or crowns. And of course, the cosmetic benefit of a natural-looking smile is a bonus that many patients find deeply worthwhile.

That said, we never recommend removing healthy, well-functioning fillings for purely cosmetic reasons without discussion. Our team will always give you an honest evaluation of what's necessary versus what's elective.

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Dental Filling Before & After Photos

Wondering what a cavity repair or tooth-colored filling can look like? Explore our before and after gallery to see actual patient cases treated by Dr. John Ku at W Plus Dental. From repairing cavities and replacing old silver fillings to restoring chipped and worn teeth, our gallery showcases the natural-looking results that modern dentistry can achieve.

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Schedule Your Consultation at W Plus Dental in Washington, DC

Whether you need a new filling, want to replace old silver ones, or simply want to learn more about your options, the team at W Plus Dental is here for you. We serve patients throughout Washington, DC with compassionate, state-of-the-art dental care in a welcoming environment.