Composite vs. Silver Fillings for Kids: What Parents Should Know

Introduction

Finding out your child has a cavity can feel stressful — especially when the dentist presents you with options and you are not sure which one to choose. One of the most common questions parents ask at Sola Kids Dental and Orthodontics is:

•        What is the difference between composite and silver fillings?

•        Which filling is better for my child?

•        Are silver fillings safe?

•        Will my child's insurance cover a tooth-colored filling?

The good news is that both types of fillings are safe and effective for treating cavities in children. The right choice depends on the location of the cavity, your child's age, and your family's preferences. This guide breaks down everything you need to know so you can make a confident, informed decision.

What Is a Dental Filling?

A dental filling is a restorative treatment used to repair a tooth that has been damaged by decay. When a cavity forms, the decayed part of the tooth is removed and the space is filled with a material that restores the tooth's shape, strength, and function.

Cavities are one of the most common chronic health conditions in children. Even kids who brush regularly can develop them — you can read more about why kids still get cavities even if they brush to understand the causes.

The two most common filling materials used in pediatric dentistry are composite resin (tooth-colored) and dental amalgam (silver). Each has its own advantages, and your dentist will help you choose the best fit for your child's specific situation.

What Are Composite Resin Fillings?

Composite resin fillings — also called tooth-colored fillings or white fillings — are made from a mixture of plastic and fine glass particles. They are designed to match the natural color of your child's teeth, making them virtually invisible.

How composite fillings work

The dentist removes the decayed area, applies the composite resin in layers, and hardens each layer with a special curing light. The filling is then shaped and polished to blend seamlessly with the surrounding tooth.

Advantages of composite fillings for kids

•        Tooth-colored appearance — blends in naturally, especially important for front teeth

•        Bonds directly to the tooth, which means less healthy tooth structure needs to be removed

•        Can be used to repair both small and medium cavities

•        Less sensitivity to temperature changes compared to amalgam in some cases

•        Aesthetically preferred by many families

Disadvantages of composite fillings

•        May not be as durable as silver fillings in high-pressure areas like back molars

•        Can take slightly longer to place

•        May not be fully covered by Medi-Cal or Denti-Cal for back teeth — more on this below

•        Can stain over time with certain foods and drinks

What Are Silver (Amalgam) Fillings?

Silver fillings — formally called dental amalgam — have been used in dentistry for over 150 years. They are made from a combination of metals including silver, tin, copper, and mercury. Despite the presence of mercury, dental amalgam has been studied extensively and is considered safe for children over the age of six by the American Dental Association and the FDA.

How silver fillings work

The dentist removes the decayed tooth material, shapes the cavity to hold the filling, and packs the amalgam into the space. It hardens quickly and creates a very durable restoration.

Advantages of silver fillings for kids

•        Extremely durable — can last 10 to 15 years or more

•        Handles chewing pressure very well, making them ideal for back molars

•        Faster to place than composite in many cases

•        Generally less expensive

•        More likely to be fully covered by Medi-Cal and Denti-Cal for posterior (back) teeth

Disadvantages of silver fillings

•        Silver-gray color — visible when the child opens their mouth wide

•        Requires slightly more tooth structure to be removed for placement

•        Some parents have concerns about mercury content, though regulatory bodies confirm amalgam is safe

•        Can cause minor temperature sensitivity in some children

•        Not recommended for children under age 6, pregnant women, or those with certain health conditions

Composite vs Silver Fillings for Kids: A Side-by-Side Comparison

When it comes to composite vs silver fillings for kids, the good news is that both types are safe and effective for treating cavities.

Appearance

Composite fillings match the natural tooth color and are nearly invisible. Silver fillings have a noticeable metallic appearance. For front teeth or teeth that show when smiling, composite is almost always the preferred choice.

Durability

Silver fillings tend to last longer, particularly in back teeth that endure heavy chewing forces. Composite fillings are durable but may need replacing sooner in high-pressure areas.

Tooth preservation

Composite fillings bond directly to the tooth, which allows more of the natural tooth structure to be preserved. Silver fillings require a slightly larger cavity preparation to hold the material in place.

Cost and insurance coverage

Silver fillings are generally less expensive and more widely covered by insurance, including Medi-Cal and Denti-Cal. Composite fillings for back teeth may require an out-of-pocket contribution depending on the insurance plan. Our team can help you verify your child's coverage before treatment begins.

Safety

Both materials are considered safe for children. The American Academy of Pediatric Dentistry supports the use of both amalgam and composite resin fillings. If you have concerns about amalgam, our team is happy to discuss options with you.

Best tooth location

Composite fillings are ideal for front teeth and visible areas. Silver fillings are often recommended for back molars due to their durability under chewing pressure. In some cases, composite can be used on back teeth as well.

Which Filling Is Best for My Child?

The right filling depends on several factors your dentist will evaluate:

Location of the cavity

Front teeth — where appearance matters — are almost always restored with composite. Back teeth that handle chewing pressure may be better suited to silver fillings in some cases, though composite is increasingly used there too.

Size of the cavity

Small to medium cavities can typically be treated with either material. Very large cavities in back teeth may be better suited to silver fillings due to durability needs.

Child's age

For younger children with baby teeth, the filling only needs to last until that tooth naturally falls out — so a less expensive silver filling may make practical sense. For permanent teeth, long-term durability and appearance both matter more.

Insurance coverage

If your family is covered by Medi-Cal or Denti-Cal, silver fillings are more likely to be fully covered for back teeth. Our front office team can check your child's benefits and explain what is covered before any treatment begins.

Family preference

Some families prefer tooth-colored fillings for all teeth regardless of location, and that is a completely valid choice. We respect your preferences and will explain the trade-offs clearly so you can decide with confidence.

Are Silver Fillings Safe for Children?

This is one of the most common concerns parents bring to us. The short answer is yes — dental amalgam has been approved and studied extensively for decades.

The mercury in amalgam fillings is bound to other metals, forming a stable alloy. It does not behave the same way as pure mercury. Major health organizations including the American Dental Association, the American Academy of Pediatric Dentistry, and the FDA have all confirmed that amalgam fillings are safe for children aged six and older.

That said, the FDA recommends avoiding amalgam fillings in children under age six, pregnant women, and people with certain kidney conditions. If any of these apply to your child, our team will recommend composite as the safer alternative.

If you have concerns, we always encourage you to ask questions. Our dentists will walk you through every option and help you feel fully informed before treatment begins.

Does My Child Really Need a Filling for a Baby Tooth?

This is another question we hear often — and it is a fair one. If the baby tooth is going to fall out anyway, why fill it?

The answer is that baby teeth matter more than most parents realize. They:

•        Hold space for permanent teeth coming in underneath

•        Support proper chewing and nutrition

•        Help with speech development

•        Guide jaw growth and development

An untreated cavity in a baby tooth can spread quickly, cause pain, lead to infection, and even affect the permanent tooth forming beneath it. In more serious cases, a dental emergency may result — which is always more stressful and costly than treating a cavity early.

If you ever find yourself in that situation, our emergency dental service is available for same-day urgent care.

How to Prevent Cavities and Avoid Fillings Altogether

The best filling is the one your child never needs. Preventing cavities starts with good daily habits and regular professional care. You can also explore our guide on dental sealants for kids — a protective coating that can significantly reduce the risk of cavities in molars.

Key prevention habits include:

•        Brushing twice a day for two full minutes with fluoride toothpaste

•        Flossing once a day — especially between back teeth where cavities often start

•        Limiting sugary drinks and sticky snacks between meals

•        Attending dental checkups every six months for professional cleanings and early detection

•        Asking about fluoride treatments and sealants at your child's next visit

Learn more about what our team offers on the Dental Treatments page.

Frequently Asked Questions About Fillings for Kids

How do I know if my child has a cavity?

Some cavities cause visible dark spots or holes, while others can only be detected with X-rays. Common signs include tooth sensitivity to sweets or temperature, pain when biting, or a visible change in the tooth's color or texture. Regular dental checkups catch cavities early when they are easiest to treat.

Do fillings hurt?

The area is numbed with a local anesthetic before the procedure, so your child should not feel pain during the filling. Some children experience mild sensitivity for a day or two afterward, but this usually resolves on its own.

How long do fillings last in baby teeth?

Silver fillings in baby teeth can last until the tooth naturally falls out. Composite fillings are equally effective for baby teeth and are often preferred for their appearance. The lifespan depends on the child's oral hygiene habits and diet.

Can my child eat right after getting a filling?

With composite fillings, your child can eat almost immediately since the material is hardened with a curing light in the office. With silver fillings, it is best to wait at least 24 hours before chewing on that side to allow the material to fully harden.

Does Medi-Cal cover fillings for kids?

Yes — Medi-Cal and Denti-Cal cover dental fillings for children as part of routine treatment. Silver fillings for back teeth are generally fully covered. Coverage for composite (tooth-colored) fillings may vary depending on the tooth location. Our team will verify your child's benefits before treatment so there are no surprises.

What if my child is anxious about getting a filling?

Dental anxiety is very common in children. Our team at Sola Kids Dental specializes in gentle, child-friendly care. We explain every step in simple language, go at your child's pace, and offer techniques to help them feel calm and comfortable throughout the visit.

Is it better to fill or pull a baby tooth?

Whenever possible, we prefer to save the tooth with a filling or other restorative treatment. Pulling a baby tooth early can cause neighboring teeth to drift and create space problems for the incoming permanent tooth. Extraction is only recommended when the tooth cannot be saved or poses a risk to the child's health.

Does Your Child Have a Cavity? We Make Treatment Easy.

At Sola Kids Dental and Orthodontics, we treat cavities with care, patience, and options your family can feel good about. Whether composite or silver is the right choice, our team will walk you through everything before we begin — no surprises, no pressure.

We accept Medi-Cal, Denti-Cal, and most PPO insurance plans. Same-day appointments are often available for urgent concerns.

Book your child's appointment today:

Website: www.solakidsdental.com

Phone: (323) 325-5641