Stainless Steel Vs Zirconia Crowns For Kids: A Pediatric Dentist's Guide

Written By: Logan Grover, Content Writer

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

Last Reviewed: September 10, 2026

Most parents are handed a two-way choice. Silver crown or white crown. Pick one.

That choice is missing an option, and it's missing the question that matters more than color. When your child needs a crown on a baby tooth, the thing that changes their appointment isn't the shade. It's how much of the tooth has to come off, and whether they need a shot and a drill at all.

There are three routes for a baby molar. A Hall crown removes no tooth structure. A traditional stainless steel crown removes a little. A zirconia crown removes the most. That's the ladder. Everything else, looks, comfort, how long it lasts, hangs off it.

Here's how each one works, what the research says, and how we decide at Mini Miners.

What Are Stainless Steel and Zirconia Crowns for Kids?

Both are prefabricated caps that cover a whole baby tooth. They arrive in sizes, and the dentist picks the one that fits.

Stainless steel crowns for kids are silver metal caps that have been used on baby molars for decades. Zirconia crowns are white ceramic caps made to look like a natural tooth.

Both cover the tooth completely, both are placed in one visit, and both are meant to stay on until the baby tooth falls out on its own.

The difference parents can see is color. The difference that changes the appointment is preparation. Metal bends. Ceramic doesn't. That single property drives almost everything else.

The Real Difference: How Much of Your Child's Tooth Comes Off

Zirconia needs the most tooth removed, stainless steel needs less, and a Hall crown needs none.

The American Academy of Pediatric Dentistry puts numbers on it. In its best practices on pediatric restorative dentistry, the AAPD states that "more circumferential tooth reduction is needed for proper fit and placement of zirconia crowns compared to SSC and, for proper retention, the minimum abutment height is 2 mm." It goes further on the amount: "reduction of 1.5 to 2 mm with a feather margin is required to passively seat the zirconia crown."

Think about what 1.5 to 2 mm means on a baby molar. These teeth are small to begin with. Taking 2 mm off all the way around is not a rounding error.

A stainless steel crown doesn't need that, because the metal can be squeezed and shaped around the tooth after it's on. The crown adapts to the tooth instead of the tooth being cut to fit the crown.

A Hall crown skips preparation completely. That's the whole point of it.

When a Filling Isn't Enough

A crown goes on when there's not enough healthy teeth left for a filling to hold.

That usually means a large cavity across more than one surface, a tooth that cracked, or a tooth that just had nerve treatment. The AAPD recommends that stainless steel crowns are "indicated for high-risk children with large or multi-surface cavitated or noncavitated lesions on primary molars, especially when children require advanced behavioral guidance techniques including general anesthesia."

The size gap between a filling and a crown is real. The AAPD summarizes 5 retrospective studies comparing two-surface amalgam fillings to preformed metal crowns in baby teeth: average 5-year failure rates were 26% for the fillings and 7% for the crowns.

If your child's cavity is small and there's plenty of tooth left, a white filling is the more conservative call. Crowns are for teeth that a filling can't save.

Stainless Steel Crowns: The Strongest Hold, and the Color Everyone Asks About

Stainless steel crowns hold better than any other option, and they look like metal.

That's the trade. The AAPD's comparison is blunt: "Clinical parameters between zirconia crowns and SSC are similar except for retention and gingival health; SSC have comparatively better retention and zirconia crowns have relatively better gingival health."

So the metal crown stays on better. The white crown is easier on the gums. Neither one wins outright, and any page telling you white crowns are the upgrade is skipping that sentence.

What the metal gives you in practice is forgiveness. The crown can be crimped and contoured after it's seated. Less tooth comes off. The appointment is shorter, which matters a lot when the patient is 4 years old and running out of patience.

What you give up is the look. On a second baby molar, most families never see it. On a first molar in a wide smile, some do.

Zirconia Crowns: Better for Gums, Harder on the Tooth

Zirconia crowns look like a real tooth and are gentler on the gum tissue, and they require the most tooth removal of any option.

The gum benefit is real and it shows up in the research. Ceramic polishes smoother than metal, and plaque has less to grab.

The catch is everything the AAPD lists as a drawback: a steep learning curve for the dentist, and the fact that the crown cannot be adjusted, so the tooth has to be reduced to fit it. There's also a fit requirement most parents never hear about. If there isn't 2 mm of tooth height left to grip, the crown doesn't have enough to hold onto.

On the front teeth, zirconia has good numbers. The AAPD cites survival probability for zirconia crowns placed in a university clinic at 93% at 12 months, 85% at 24 months, and 76% at 36 months.

On back teeth, the AAPD is careful: "Evidence is limited on the use of zirconia crowns as esthetic crowns for primary posterior teeth. When SSC would otherwise be indicated, zirconia crowns may be considered in lieu of SSC due to esthetic considerations."

The guideline treats posterior zirconia as an appearance choice, not a clinical upgrade. That's not an argument against white crowns on molars. We place them here. It's an argument for knowing what you're choosing and why.

What Is a Hall Crown, and Does It Actually Work?

A Hall crown is a stainless steel crown cemented over a decayed baby molar with no drilling, no cavity removal, and no numbing shot. And yes, the evidence for it is strong.

The AAPD defines it plainly: the Hall technique "calls for cementation of an SSC over a caries-affected primary molar without local anesthetic, caries removal, or tooth preparation." The reasoning is that bacteria sealed under the crown and cut off from sugar die instead of spreading.

A 2025 systematic review and meta-analysis in Evidence-Based Dentistry by Tedesco, Innes and colleagues pooled 25 studies. Across the randomized trials, the Hall Technique's success rate was 98% at 12 months (95% CI 97 to 99). Across non-randomized studies followed for up to 89 months, it was 95% (95% CI 91 to 100).

Ninety-eight percent, with no drill and no shot.

The AAPD's own position is more measured. It says the Hall technique "may be considered a treatment modality for carious primary molars when traditional SSC technique is not feasible due to limitations such as poor cooperation or barriers to care," and that more research comparing it to conventionally placed crowns is needed. That's a fair reading of the evidence, and it's the honest version to give parents.

Here's the part that surprises people. For a young child, an anxious child, or a child with sensory differences, the white crown is often the more invasive choice, and the option that removes nothing has the best recent success numbers. That runs against how these crowns usually get sold.

We place Hall crowns and white crowns at Mini Miners using NuSmile stainless steel and Sprig and NuSmile BioFlx white crowns. Being able to offer the no-drill route is why some kids who arrived terrified leave without ever meeting a needle.

Which Crown Is Right for Your Child's Tooth?

The tooth decides first, then your child's ability to sit through the appointment, then appearance.

	Hall crown	Traditional stainless steel	Zirconia (white)
Tooth removed	None	Minimal, crown is shaped to the tooth	1.5 to 2 mm all around, per AAPD
Numbing shot	Not needed	Usually yes	Usually yes
Drilling	None	Some	The most
Color	Silver	Silver	Tooth-colored
Retention	Metal, holds well	Best retention per AAPD	Lowest of the three per AAPD
Gum health	Metal	Metal	Best per AAPD
Best fit	Back molars, anxious or very young kids, decay caught before it reaches the nerve	Back molars, teeth after nerve treatment, heavy grinders	Front teeth, visible molars, metal sensitivity, families who want white
Evidence	98% success at 12 months, 25-study review	Decades of use, AAPD first-line for high-risk kids	Strong on front teeth, limited on back teeth per AAPD

A few situations settle themselves. A tooth that just had a pulpotomy needs full coverage and a crown that grips, so metal usually wins. A front tooth that shows every time your child laughs is a zirconia case. A 3-year-old with early decay on a back molar who cannot sit for an injection is exactly what the Hall technique was built for.

Grinding is the one that gets oversimplified. A hard ceramic crown grinding against a natural baby tooth wears the natural tooth, not the crown. Worth raising with your dentist if your child grinds at night.

Can You Put a White Crown on a Back Molar?

Yes, and it's a reasonable choice as long as you know it takes more tooth structure.

Most offices don't offer it, which is why so many parents assume back teeth mean silver. The AAPD's language explains the hesitation: the evidence on posterior zirconia is limited, and the reduction required is greater. Neither of those makes it wrong. They make it a decision rather than a default.

We do place white crowns on back molars. What I tell parents is that if the tooth has plenty of structure left and your child can handle a longer appointment, it's a fine choice. If the tooth is badly broken down or the appointment is already going to be a stretch, the metal crown is the better tool and nobody is going to see it.

Strength: A 2025 Trial Found No Measurable Difference

At 12 months, stainless steel, zirconia and BioFlx crowns performed about the same on every measure recorded.

Researchers publishing in BMC Oral Health randomized 75 children with a mean age of 6.3 years into 3 groups of 25, receiving stainless steel, zirconia, or BioFlx crowns on primary molars. At 12 months there was no statistically significant difference between the groups in retention (p=0.611), gingival index (p=0.747), or plaque index (p=0.578). Stainless steel showed slightly better retention and zirconia slightly better gum scores, matching the AAPD's summary, but neither gap reached significance.

That's one trial with 75 children over one year, so it isn't the last word. It does argue against the two loudest marketing claims in this space: that white crowns fall off constantly, and that they're clinically better. Over a year, they performed about the same.

What to Ask Before the Appointment

Ask which crown your dentist would pick for this specific tooth, and why.

The answer should point at the tooth in front of them, not a house rule. Ask how much tooth structure comes off with each option. Ask whether your child needs a numbing shot. Ask whether the tooth had nerve treatment, because that usually settles the question on its own.

Then ask the office to run a pre-treatment estimate with your dental plan before you schedule. Plans handle white crowns and stainless steel crowns differently, and you want that in writing ahead of time rather than at checkout. Our billing and insurance page explains how we handle it, and for families without dental insurance we run a membership plan.

One more. If the tooth is a back molar nobody sees, weigh appearance last. The tooth in the smile line is where appearance matters.

How We Choose Crowns at Mini Miners in Erie, CO

We start with the tooth, then the child, then the color, in that order.

I completed my pediatric dental residency at UCLA and I'm a board-certified diplomate, and I also have a degree in child psychology from Wellesley. That second one shapes the crown conversation more than people expect. A crown that's clinically perfect and emotionally awful teaches a 4-year-old that the dentist is a place where bad things happen, and we'll be dealing with that lesson for the next decade.

So the questions run in order. Is there enough tooth left, and did the nerve need treatment? Can this child sit through a shot and a drill today, or is the no-drill route the one that keeps this visit positive? Will anyone see this tooth?

Every treatment room here is plumbed for nitrous oxide, and we offer mild, moderate and deep sedation. All our instruments and sensors are sized for small mouths. Kids pick from over 70 movies, and our X-ray machine works in the treatment room so they can keep watching while we take images. For kids with dental anxiety or special needs, we'll do a happy visit first, where nothing happens except getting comfortable in the room.

We're at 61 Erie Pkwy, Unit 101, in Erie Commons at Briggs and Erie Parkway, and families drive to us from Lafayette, Louisville, Longmont, Broomfield, Boulder, Thornton and Westminster. If your child needs a crown and you want to talk through which one fits, call us at (303) 500-3202 or book a visit. Bring the questions. The right stainless steel vs zirconia crowns decision is the one you understand before your child is in the chair.

FAQs

How long do crowns on baby teeth last?

The goal is for the crown to stay on until the baby tooth falls out naturally, which is usually 2 to 5 years depending on the child's age and which tooth it is. Retention is the one place the AAPD gives stainless steel the edge over zirconia. Brushing the crown margin and taking care of it afterward makes more difference than which material you picked.

Are stainless steel crowns safe for children?

Yes. They've been used on baby molars for decades and the AAPD recommends them as a first choice for high-risk children with large or multi-surface cavities on primary molars. They do contain nickel, so tell your dentist if your child has a known metal allergy and a white crown will be used instead.

Do zirconia crowns require more drilling than stainless steel crowns?

Yes, and by a defined amount. The AAPD states that placing a zirconia crown requires 1.5 to 2 mm of tooth reduction with a feather margin, plus at least 2 mm of remaining tooth height for the crown to hold. A stainless steel crown needs less, because the metal is shaped around the tooth instead.

What is a Hall crown for kids?

A Hall crown is a stainless steel crown cemented over a decayed baby molar with no drilling, no cavity removal and no numbing shot. A 2025 review of 25 studies in Evidence-Based Dentistry reported a 98% success rate at 12 months across randomized trials. It's used on back baby molars where the decay hasn't reached the nerve.

Can my child get a white crown on a back molar?

Yes, at offices that place them. The AAPD notes that evidence on white crowns for back baby teeth is limited and treats it as an appearance choice rather than a clinical upgrade. It works well when the tooth still has plenty of structure and your child can handle a longer appointment.

Will insurance cover a zirconia crown for my child?

Coverage varies by plan. Many plans treat a white crown as an appearance choice rather than a clinical necessity, while Hall crowns are usually processed the same way as stainless steel crowns. Ask your dentist's office to run a pre-treatment estimate with your plan before you schedule, so nothing about coverage is a surprise later.

What happens if my child's crown falls off?

Save the crown if you can find it and call the office the same day, because the tooth underneath is exposed and neighboring teeth can start to drift. Most crowns can be recemented if the tooth is sound. Our guide on what to do if a crown comes off walks through the first steps at home.