Are White Fillings Safe For Kids?

Written By: Logan Grover, Health Content Writer

Reviewed By: Dr. Alison Grover, Board-Certified Diplomate Pediatric Dentist

Last Reviewed: May 1, 2026

Yes. White fillings for kids are safe, mercury-free, and backed by both the American Dental Association and the American Academy of Pediatric Dentistry. If your child has a cavity and your pediatric dentist recommends a composite filling, you're not taking a risk. You're choosing the most widely used restorative material in pediatric dentistry today.

But "safe" and "best choice for every situation" aren't the same thing. The answer gets more specific once you look at what composite fillings are made of, how they compare to silver amalgam, what they cost in Colorado, and the one factor most dental websites won't talk about: how much the dentist's technique matters.

What White Fillings for Kids Are Made Of

White fillings (also called composite fillings or tooth-colored fillings) are made from a blend of plastic resin and fine glass particles. The dentist applies the material in layers directly onto the cleaned tooth, then hardens each layer with a curing light. The result bonds to the tooth structure, which means less drilling and more of your child's natural tooth stays intact.

Some parents have asked about BPA in composite materials. It's a fair question. Older composite formulas used Bis-GMA, a resin that can release trace amounts of BPA during curing. The ADA's 2024 review of direct restoration materials states that the low-level BPA exposure from dental composites poses no known health risk. And most modern pediatric formulas are now BPA-free entirely. If that matters to you (and it should), ask your dentist which brand they use.

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

Parents searching "are white fillings safe for kids" usually want to know how composite stacks up against silver amalgam. Here's the honest breakdown:

Composite (White) vs. Amalgam (Silver) vs. Glass Ionomer

Factor	Composite (White)	Amalgam (Silver)	Glass Ionomer
Appearance	Matches natural tooth color	Silver/dark metallic	Slightly translucent, less precise match
Mercury content	None	Contains mercury (FDA/ADA say safe in place)	None
Durability	5–7+ years with proper care	10–15 years, stronger under heavy chewing	~5 years, suited to baby teeth timeline
Tooth preservation	Bonds to tooth, less drilling needed	Requires more tooth removal for retention	Minimal drilling
Cost (national avg.)	$173–$439 per tooth	$108–$256 per tooth	Similar to composite
Colorado avg.	~$227 per tooth	Lower than composite	Varies
Best for	Most pediatric cavities, front and back teeth	Heavy load-bearing situations (less common today)	Small cavities on baby teeth, fluoride release benefit

Most pediatric dental practices have moved toward composite as the default. But I want to be honest about something the competitors skip: amalgam isn't evil. It has a 150-year track record, it's more forgiving to place, and in certain situations (a deep cavity on a back molar in an uncooperative three-year-old under sedation), it can actually be the better clinical choice. The shift away from amalgam is driven more by parent preference and aesthetics than by safety concerns.

Are Composite Fillings Safe for Children?

Both the ADA and the AAPD's guidelines on pediatric restorative dentistry support resin-based composites for Class I and Class II restorations in primary and permanent teeth. The materials are biocompatible, mercury-free, and effective when placed correctly.

That last part matters more than most articles let on.

Composite fillings are technique-sensitive. The tooth has to be completely dry during bonding. If moisture creeps in (saliva, a wet tongue, a child who won't stop moving), the bond weakens. That means higher failure rates, marginal leakage, and secondary decay forming underneath the filling. I've seen fillings fail within a year because the isolation wasn't right during placement.

This doesn't mean composites are unreliable. It means the skill of the dentist matters more with composite than with amalgam. Amalgam is forgiving. Composite rewards precision. That's a real trade-off, and parents deserve to hear it.

If your child is very young, anxious, or has difficulty sitting still, ask your dentist how they plan to maintain a dry field. Rubber dam isolation, pediatric sedation options, and experienced chairside technique all make a difference.

How Long Do White Fillings Last on Kids' Teeth?

On baby teeth, the relevant question isn't "how long does the filling last?" It's "does it last until the tooth falls out naturally?" Baby teeth exfoliate on their own between ages 6 and 12, depending on the tooth. A composite filling placed on a 4-year-old's molar needs to hold for roughly 6–8 years. Most well-placed composites hit that mark comfortably.

On permanent teeth, composite fillings typically last 5–7 years with proper care. Some practices report lifespans of 10–20 years under ideal conditions, but those numbers assume excellent hygiene, low sugar diets, and no grinding habits. For a realistic expectation with a child, plan on 7 years and consider it a win if you get more.

The biggest threat to filling longevity in kids isn't the material. It's diet. A child who snacks on sticky candy and drinks juice all day will break down any filling faster. We talk to Colorado families about this during every cavity treatment conversation because finding a practice that explains the full picture matters as much as the material itself.

What the Filling Appointment Looks Like

The process takes about 30–60 minutes per tooth, depending on the size of the cavity and your child's cooperation level. The dentist numbs the area, removes the decayed portion of the tooth, cleans the cavity, and applies the composite resin in thin layers. Each layer gets hardened with a blue curing light before the next goes on. After the final layer, the dentist shapes and polishes the filling to match the tooth's natural bite.

For children who are anxious or very young, nitrous oxide or other sedation methods keep them comfortable and still. A calm child means a drier field, which means a better filling.

Your child can eat and drink the same day. Avoid hard or sticky foods for 24 hours, then normal brushing and flossing keep the filling in good shape.

The Cost of White Fillings in Colorado

The national average for a composite filling is $226, with a range of $173–$439 depending on the tooth location, cavity depth, and number of surfaces involved. In Colorado, the average sits right at $227 per tooth (per CareCredit's state-level data).

Most dental insurance plans cover composite fillings for children, though some older plans reimburse at the lower amalgam rate and bill the difference to parents. If your child is covered under Health First Colorado (Medicaid), restorative services including fillings are covered for children under 21.

If you're paying out of pocket, ask about membership plans. Many pediatric practices (including ours) offer in-house dental memberships that reduce per-procedure costs for families without insurance.

When Composite Isn't the Right Call

I'd rather give you the full picture than pretend white fillings are perfect for every case.

If the cavity is very deep and close to the nerve, a composite filling alone may not be enough. Your dentist might recommend a stainless steel crown or pulp therapy instead.

If your child can't stay still and sedation isn't an option, moisture contamination becomes a real risk. In rare cases, an amalgam filling or glass ionomer might provide a more reliable seal.

If the cavity is on a baby tooth that's going to fall out within a year anyway, glass ionomer (which releases fluoride and requires minimal drilling) might be a smarter, lower-cost option. The best pediatric dentists don't default to one material for everything. They match the material to the tooth, the child, and the situation. That's what white fillings for kids at our practice look like in action.

White Fillings for Kids at Mini Miners Pediatric Dentistry

White fillings for kids are safe, effective, and the right choice for the vast majority of pediatric cavities. At Mini Miners Pediatric Dentistry, we use BPA-free composite materials, maintain strict isolation protocols, and take the time to explain trade-offs with Colorado families before any procedure starts. If your child needs a filling, or if you've noticed early signs of tooth decay, schedule an appointment, and we'll walk you through exactly what your child needs and why.

Frequently Asked Questions

Are white fillings for kids BPA-free?

Most modern composite formulas used in pediatric dentistry are BPA-free. Older formulations contained Bis-GMA resin that could release trace BPA during curing, but the ADA's 2024 materials review found that even those levels pose no known health risk. If BPA-free matters to you, ask your dentist which specific brand and formula they use. It's a reasonable question and any good pediatric practice will answer it directly.

How much do white fillings cost for kids in Colorado?

The Colorado average for a composite filling is about $227 per tooth, which is right in line with the national average of $226. The full range runs $173–$439 depending on the tooth, cavity size, and number of surfaces involved. Most dental insurance plans cover composite fillings for children. Families on Health First Colorado (Medicaid) have restorative services covered for kids under 21.

Do white fillings last long enough for baby teeth?

Yes. Baby teeth fall out naturally between ages 6 and 12. A well-placed composite filling typically lasts 5–7 years or longer, which comfortably covers the gap until the tooth exfoliates on its own. Glass ionomer fillings (which release fluoride) are another option for baby teeth with about a 5-year lifespan.

Can a very young or anxious child get a composite filling?

They can, but the placement requires a dry field to bond properly. For children under 4 or those with high anxiety, your dentist may recommend nitrous oxide, oral sedation, or in some cases general anesthesia to keep the child still and comfortable. Good isolation technique during placement directly affects how long the filling lasts.

Are silver amalgam fillings dangerous for kids?

The ADA and FDA both consider dental amalgam safe for use, including in children over 6. Mercury in amalgam is bound to other metals and releases only trace vapor. That said, many parents and practices prefer composite as a mercury-free alternative, and the trend in pediatric dentistry has moved firmly in that direction. The AAPD supports both options with appropriate clinical judgment.

What should I ask my pediatric dentist before my child gets a white filling?

Ask about the specific composite material (is it BPA-free?), how they'll isolate the tooth from moisture, whether sedation is recommended for your child's age and temperament, and what their success rate looks like for similar cases. These questions help you evaluate technique and materials, not just price.

Is there any situation where a white filling isn't the best option?

Yes. If the cavity is very deep and near the nerve, a crown or pulp therapy may be more appropriate. If moisture control is a challenge (very young or uncooperative child without sedation), glass ionomer or occasionally amalgam may provide a more reliable seal. Baby teeth close to falling out naturally might not need a composite filling at all.