Tooth-Colored Fillings vs Silver Amalgam: Which Is Better?

By Lovik Mirzaeian, DDS. Updated October 2026.

Neither filling material is better in every situation. Tooth-colored composite looks natural, bonds to the tooth, and needs less drilling, which makes it my usual choice for most cavities today. Silver amalgam is tougher in very large back-tooth fillings, is more forgiving in a wet or hard-to-reach spot, and costs less. Which one is right depends on where the cavity is, how big it is, and what you care about most.

Patients ask me about this every week, usually because they have old silver fillings and wonder if they should do something about them. Let me lay out the trade-offs plainly.

What Each Material Actually Is

Composite is a resin mixed with fine glass or ceramic particles. It goes in soft, gets shaped to the tooth, and is hardened with a blue light. It comes in shades, so it can be matched to your tooth closely enough that most people cannot find it.

Amalgam is a mix of silver, tin, copper, and mercury bound together into a stable alloy. It has been used in dentistry for well over a century. It goes in as a soft paste, is packed into the cavity, and hardens over the next several hours. It is silver-gray and darkens over time.

Appearance

This one is not close. Composite wins. It disappears into the tooth. Amalgam is visible whenever you laugh or yawn, and over the years it can stain the surrounding tooth a gray tint that shows through the enamel.

For front teeth and premolars that show when you smile, I almost never place amalgam anymore. For a molar far in the back, appearance matters less, and some patients genuinely do not care. That is a fair position.

Durability and Strength

Here is where I have to be honest rather than fashionable. Amalgam is a very durable material. Well-placed amalgams commonly last fifteen years or more, and I regularly see ones that are thirty years old and still doing their job. Composite has improved a lot over the past two decades, and modern composites in small to medium fillings hold up well, but in general they wear a little faster and are more sensitive to how carefully they were placed.

The bigger the filling, the more this matters. A tiny composite on a molar will likely last as long as you would want. A huge filling that replaces most of a molar is a harder ask for composite, and in those cases I often talk about a crown instead of either material. I covered that decision in do I really need a crown.

The Bonding Advantage

Composite has one structural benefit amalgam does not: it bonds chemically to the tooth. Amalgam just sits in a hole that has to be shaped with undercuts to hold it in place, which means removing some healthy tooth. Composite lets me remove only the decay. Bonding also helps hold weakened cusps together, which can reduce the chance of a crack.

Cost

Amalgam is cheaper, both in material and in chair time, and insurance plans reflect that. Many plans cover amalgam on back teeth at a higher percentage and pay composite at the amalgam rate, leaving you the difference. The gap is usually modest for a single filling but adds up if you need several. Ask our office what your plan does before you decide. We will tell you the numbers straight.

Safety and Mercury

This is the question behind many of the questions. Amalgam contains mercury bound in an alloy. The American Dental Association and the FDA both consider amalgam safe for most people, and I have not seen convincing evidence that intact amalgam fillings harm the general population.

The FDA does advise that certain groups may prefer to avoid new amalgam where a reasonable alternative exists: pregnant or nursing women, children under six, and people with known mercury sensitivity or certain neurological or kidney conditions. That is a sensible precaution, and it is easy to follow now that composite is a good option for nearly every cavity.

What I will not do is tell you that your old silver fillings are poisoning you. They are not, as far as the evidence shows, and drilling them out releases more mercury vapor in that moment than leaving them alone does.

Should You Replace Old Silver Fillings?

Only when they are failing. That is my rule and I stick to it. Replace an amalgam when it has a crack, when decay has crept in around the edge, when the tooth around it has fractured, or when it has worn down enough that the bite has changed. If the only reason is color and the filling is on a front-facing tooth that bothers you every time you see it, that is a legitimate cosmetic choice and we can talk about it.

What I discourage is replacing sound amalgams just because they are amalgam. Every time a filling is replaced, the hole gets a little bigger. Do that two or three times and the tooth ends up needing a crown or a root canal that it never would have needed otherwise. A silver filling that is doing its job is a good filling.

If an old filling has started to hurt, that is a different situation. This post explains what a painful filling usually means.

How I Choose in Practice

For most cavities in most people, I use composite. It preserves more tooth, looks right, and modern materials hold up well. I reach for amalgam in a few specific cases: a very large filling on a back molar in someone who grinds heavily, a spot deep below the gumline where I cannot keep the tooth dry enough for bonding to work, or when cost is the deciding factor and the tooth is out of sight. Those cases are not common, but they exist.

When to See a Dentist

If you have old fillings and are not sure how they are holding up, that is exactly what a routine exam is for. I check every filling with a probe and x-rays and tell you which ones are fine and which ones are on borrowed time. If a filling has broken, fallen out, or a tooth around one has cracked, call our emergency dentist line and we will get you in.

Frequently Asked Questions

Are white fillings as strong as silver fillings?

In small to medium cavities, modern composite fillings hold up well and last many years. Amalgam still has an edge in very large back-tooth fillings and in heavy grinders. For fillings that big, a crown is often a better answer than either material.

Should I have my silver fillings removed?

Not unless they are failing. Replace an amalgam if it is cracked, has decay around the edge, or the tooth around it has broken. Replacing sound fillings for no reason makes the cavity larger each time and can lead to a crown or root canal the tooth never needed.

Are amalgam fillings safe?

The American Dental Association and the FDA consider amalgam safe for the general population. The FDA does suggest that pregnant or nursing women, young children, and people with certain health conditions choose an alternative where practical. Composite is a good alternative for nearly every cavity today.

Do white fillings cost more than silver?

Yes, composite usually costs somewhat more because of material and placement time. Some insurance plans pay composite on back teeth at the amalgam rate, leaving you the difference. Ask the office to check your plan before you decide.

Wondering About Your Fillings? Dr. Mirzaeian Can Help

Whether you need a new filling or want an honest opinion on old silver ones, we will explain the options without pressure. Contact us to set up a consultation and bring your questions.

Lovik Mirzaeian, DDS has achieved extensive training in multidisciplinary dental treatments. His credentials include Dental Implants, Cosmetic Dentistry, Full Mouth Reconstruction, Endodontics, Oral Surgery, Orthodontics, and Sleep Sedation. Our office puts your comfort and smile first, and we are dedicated to giving you top-notch dental care. Get ready to show off your perfect smile!

Looking for a trusted family dentist in Clovis? Dr. Mirzaeian welcomes new patients of all ages.