What happens if my child has a cavity?

Hearing that your child has a cavity is extremely common and nothing to feel guilty about — a great many children get them despite good care, because young enamel is more vulnerable and little ones aren't perfect brushers. What matters most is treating a cavity promptly so it stays small and simple to fix, and the reassuring news is that we have a range of ways to do that, matched to your child's age, the size and location of the cavity, and their comfort level.

For a typical cavity, the treatment is a filling. We gently remove the small area of decay and fill the space with a tooth-colored material that restores the tooth's shape, function, and strength. For children, we take particular care to keep this comfortable: we numb the area thoroughly so the procedure itself isn't painful, explain each step in kid-friendly language, and use our tell-show-do approach so nothing is a surprise. For anxious children, or for more extensive work, we can discuss comfort options ranging from nitrous oxide to other forms of sedation.

For very early or small cavities, we may not need to drill at all. Silver diamine fluoride — a liquid brushed onto the spot — can arrest the decay painlessly, which makes it a wonderful choice for very young or anxious children (its one trade-off is that it darkens the treated area, so we discuss that with you first). This is part of why catching cavities early is so valuable: the smaller the cavity, the gentler the options.

If a cavity is large and has weakened much of the tooth, a filling may not be enough to hold up to chewing, and a crown becomes the better long-term choice — a cap that protects and preserves the remaining tooth. And if decay has reached the nerve, a baby-tooth version of a root canal (a pulpotomy) followed by a crown can save the tooth and relieve pain, letting that baby tooth keep doing its job until it's naturally replaced.

The single most important message is this: don't wait. A small cavity treated early means a quick, easy, inexpensive visit. A cavity left to grow can reach the nerve and lead to pain, infection, an abscess, and much more involved treatment — as well as possible harm to the developing adult tooth beneath. If we've found a cavity, we'll walk you through exactly what your child needs and why, answer all your questions, and keep the whole experience as gentle and calm as possible. Catching and treating it now is the kindest, simplest path for your child.