Silver caps are prefabricated metal crowns, officially called stainless steel crowns, used to cover and protect baby teeth that are too damaged or decayed for a regular filling. They’re the most common full-coverage restoration in pediatric dentistry, made from a nickel-chromium alloy, and they’ve been the standard treatment for over 50 years. If your child’s dentist recommended one, it almost certainly means the tooth has too much decay for a filling to hold up on its own.
Why a Filling Won’t Work
Dentists turn to silver caps when a cavity is too large or too deep for a standard filling to be reliable. Fillings work well for small, contained areas of decay, but when two or three surfaces of a baby molar are affected, fillings fail at a much higher rate. A study tracking over 6,000 treated teeth found that after three years, 21% of multi-surface composite fillings failed and needed replacement. Stainless steel crowns failed at a rate of just 1.5% over the same period. Nearly 7% of the composite fillings eventually had to be replaced with a crown anyway.
Silver caps are also used after a pulpotomy (a procedure sometimes called a “baby root canal”), when a tooth has broken or chipped significantly, or when a child has developmental defects in their enamel that leave teeth vulnerable. Because baby molars need to stay in place until permanent teeth push them out, preserving them with a durable restoration prevents spacing problems and chewing difficulties down the road.
What Happens During Placement
The dentist numbs the area, removes the decayed portion of the tooth, and then reshapes the remaining tooth so a pre-made crown fits over it like a helmet. The crown is selected from a set of standard sizes, trimmed and adjusted to your child’s tooth, then cemented in place. The whole process is typically completed in a single visit.
Your child may feel some pressure or soreness in the hours afterward. For the first 24 hours, stick to soft foods at room temperature. Avoid hard, crunchy items like nuts and pretzels, and skip sticky foods like caramel, taffy, and gummy candy, which can pull at the crown or get trapped around it. Once any initial tenderness fades, your child can return to eating normally.
Caring for a Silver Cap
A crowned tooth still needs daily brushing and flossing. Plaque can build up at the gum line where the cap meets the tooth, so pay extra attention to that area. Use a soft-bristled toothbrush and non-abrasive toothpaste. The crown itself won’t decay, but the tooth underneath and the surrounding gum tissue still need protection.
Silver caps sometimes come loose. This can happen if the cement weakens over time, if your child bites into something especially hard or sticky, or if the baby tooth underneath starts to resorb naturally as the permanent tooth pushes up. If the cap falls off, save it and call your dentist. In many cases it can be cleaned and re-cemented. If not, the dentist will decide whether a new crown or a different treatment makes more sense.
How Long They Last
Silver caps are designed to stay on until the baby tooth falls out on its own, which could be anywhere from a few months to several years depending on your child’s age when the crown is placed. When the tooth is ready to shed naturally, the crown comes out with it. There’s no separate removal procedure needed.
Their durability is the primary reason dentists still recommend them. With a failure rate under 2% at three years, stainless steel crowns outperform every other restoration option for baby teeth by a wide margin.
Nickel Allergy Concerns
Because stainless steel crowns contain nickel, parents sometimes worry about allergic reactions. Nickel sensitivity affects roughly 10% of the general population, and some estimates range as high as 28%. However, research measuring nickel release from these crowns found that even with up to eight crowns in a child’s mouth, the amount of nickel released into saliva was far below toxic levels and did not exceed normal daily dietary intake of the metal (200 to 300 micrograms per day from food alone).
Allergic reactions inside the mouth also require a stronger trigger than reactions on the skin, roughly 5 to 12 times stronger. That said, if your child has a known nickel allergy or has reacted to nickel-containing jewelry, let the dentist know before placement. Alternative materials exist for children who can’t tolerate nickel.
Tooth-Colored Alternatives
The biggest complaint about silver caps is how they look. For parents who want a less noticeable option, zirconia crowns offer a white, tooth-colored alternative. Zirconia is strong, biocompatible, and resistant to corrosion. These crowns are sometimes marketed as “white crowns” or “ceramic crowns” for kids.
The trade-offs are real, though. Zirconia crowns require more aggressive tooth preparation, always need local anesthesia, and take longer to place, which can be harder on young or anxious children. In one clinical study, stainless steel crowns showed 100% retention at three months while about 13% of zirconia crowns showed some material loss or complete failure. Zirconia crowns also caused significantly more wear on the opposing teeth: 80% of opposing teeth showed wear after three months, compared to just 10% with stainless steel. Zirconia crowns also cost more.
Stainless steel remains what the dental field considers the gold standard for back baby teeth. Zirconia may make sense for front teeth where appearance matters more, but for molars that no one sees when your child smiles, the silver cap is the more reliable and affordable choice.