Tooth-Colored Fillings vs Silver Amalgam: What’s the Difference and How Long Do Dental Fillings Last?

If you’ve been told you need a filling, one of the first questions your dentist will ask — or that you should ask — is which type of filling material you’d like. The two most common options are tooth-colored composite resin and silver amalgam. Understanding how long dental fillings last, what each material is made of, and how they perform over time will help you make a confident, informed decision.

Tooth-Colored vs Silver Amalgam Fillings: A Side-by-Side Comparison

How Long Do Dental Fillings Last?

How long dental fillings last depends on the material used, the location of the filling, your bite habits, and how well you maintain your oral hygiene. Here’s what you can realistically expect:

• Composite (tooth-colored) fillings: Typically last 7–10 years, though many patients keep them in great shape for longer with regular care.
• Amalgam (silver) fillings: Known for their toughness, amalgam fillings often last 10–15 years or more, particularly on back molars that endure heavy chewing forces.

Fillings on back teeth generally wear faster because of the pressure placed on them during chewing. Front-tooth fillings — usually composite — tend to last longer because they handle less force. Habits like grinding your teeth, chewing ice, or biting your nails can shorten any filling’s lifespan significantly.

Regular professional teeth cleanings and check-ups are one of the most effective ways to catch early filling wear before a small problem becomes a larger, costlier one.

What Are Tooth-Colored (Composite) Fillings?

Composite fillings are made from a mixture of fine glass particles and plastic resin. The dentist matches the shade to your existing tooth color, making them nearly invisible once placed. They bond chemically to the tooth surface, which means less healthy tooth structure needs to be removed during preparation.

They are an excellent choice for visible teeth — especially front teeth — and for patients who prefer a metal-free restoration. If aesthetics matter to you, composite is the clear winner. You can explore a full range of cosmetic options on our cosmetic dentistry page.

What Are Silver Amalgam Fillings?

Amalgam fillings have been used in dentistry for well over a century. They consist of a mix of metals including silver, tin, copper, and mercury. Despite ongoing public debate about mercury content, major dental and health organizations — including the American Dental Association — consider amalgam safe for most patients when used as directed.

Amalgam is exceptionally durable and holds up well under the intense pressure of back molars. It’s also less technique-sensitive than composite, meaning it’s easier to place successfully in difficult areas of the mouth. For deep cavities or large restorations in hard-to-reach spots, amalgam often remains a practical, long-lasting choice.

How Much Does a Dental Filling Cost?

Filling costs vary based on the material, the size of the cavity, and your location. In general, composite fillings cost more than amalgam because of the more involved placement process and material expense. Dental insurance plans often cover amalgam fully but may only cover the amalgam equivalent cost for composite, leaving you to pay the difference.

The best way to understand your out-of-pocket costs is to ask your dental office to run a pre-authorization with your insurance before the procedure. At A&E Dental in Floral Park, NY, the team is happy to walk you through your coverage before treatment begins.

How Long Does Numbness Last After a Dental Filling?

After a filling, the local anesthetic typically wears off within 1 to 3 hours, depending on the type and amount used. You may notice your lip, cheek, or tongue feeling thick or numb during this time. Avoid eating hot foods or drinks until the sensation fully returns to prevent accidental bites or burns.

Some patients experience mild tooth sensitivity to temperature for a few days to a few weeks after a filling — this is completely normal and usually resolves on its own. If sensitivity persists beyond a month or worsens, contact your dentist, as the filling may need adjustment or the tooth may require further evaluation, such as a root canal if the pulp has been affected.

How to Fix a Loose Dental Filling

A loose or fallen filling is a dental situation that needs prompt attention — it’s not something to wait on. When a filling comes out, the exposed tooth structure is vulnerable to bacteria, temperature changes, and further decay. Here’s what to do:

• Rinse your mouth gently with warm water.
• Avoid chewing on that side of your mouth.
• Do NOT try to re-cement the filling yourself with household adhesives.
• Call your dentist as soon as possible — this qualifies as a dental emergency.
• Over-the-counter temporary dental cement (available at pharmacies) can protect the tooth temporarily until your appointment.

If you’re dealing with a lost or damaged filling urgently, our emergency dentistry team is equipped to help quickly.

How Long Does a Temporary Dental Filling Last?

Temporary fillings are designed to be exactly that — temporary. They typically last 4 to 6 weeks before they begin to break down. They are commonly placed after a root canal to allow healing time, or to protect a tooth while a permanent restoration is being fabricated.

Never assume a temporary filling is a long-term solution. If your permanent filling or crown appointment is delayed, let your dentist know — leaving a temporary filling in place too long can lead to decay underneath and compromise the final result.

What About a Dead Tooth Filling?

A “dead tooth” refers to a tooth where the nerve and blood supply inside the pulp have died — often due to untreated decay, trauma, or infection. A dead tooth can still be restored with a filling if the decay hasn’t gone too deep, but in many cases a root canal is needed first to clean out the infected or necrotic pulp tissue before any restoration is placed.

Dead teeth may also discolor over time, turning grayish or brownish. After root canal treatment, options like internal bleaching, a crown, or porcelain veneers can restore both the function and appearance of the tooth. Our team at A&E Dental can evaluate the tooth and recommend the most appropriate path forward.

Which Filling Type Is Right for You?

There is no single “best” filling for everyone. Your dentist will consider the size and location of the cavity, your bite, your aesthetic preferences, and your budget. For front teeth and smaller cavities, composite is usually the preferred choice. For large back-tooth restorations where durability is paramount, amalgam still earns its place — though many modern practices now use composite or ceramic alternatives exclusively.

The most important step is treating the cavity promptly, regardless of which material is chosen. A small cavity that’s filled today stays small. Left untreated, it grows — and may eventually require a crown, root canal, or extraction.

Ready to Talk About Your Filling Options?

Whether you’re dealing with a new cavity, a cracked old filling, or just want to know your options, the team at A&E Dental is here to help you make a clear, confident decision. We offer both composite and other restorative options tailored to your specific needs. Learn more about our dental fillings service or reach out to schedule a consultation when you’re ready.

You can also find us and read patient reviews on our Google Business Profile. We look forward to helping you maintain a healthy, confident smile.