Quick answer: Cavities in children are treated along a spectrum, from least invasive to most. A very early lesion just needs fluoride varnish. A small cavity gets a filling. A deeper one may need silver diamine fluoride, a pulpotomy, or a crown. A tooth too damaged to save is extracted, sometimes with a space maintainer placed afterward. Which option is right depends on how deep the decay is, your child’s age, and how well they can tolerate treatment.
Hearing your child has a cavity is common; nearly all parents deal with it at some point. What’s confusing is the number of different cavity treatment dentists mention: fillings, SDF, pulpotomy, crowns, extraction, sometimes fluoride varnish on top of all that.
This guide walks through every option in order of severity, so you know what to expect no matter where your child’s cavity falls on that spectrum.
Table of Contents
How Dentists Decide Which Treatment Your Child Needs
Before picking a treatment, your dentist is weighing a few things at once:
- How deep is the decay? A cavity confined to the outer enamel needs far less intervention than one that’s reached the nerve.
- Which tooth is affected, and how much time is left before it falls out naturally? A back molar with two more years of service left is treated differently than one about to be shed anyway.
- How old is your child, and how well can they cooperate? A three-year-old and a nine-year-old aren’t offered the same range of options for the same-sized cavity.
- Does your child have anxiety, or special healthcare needs? This can shift a dentist toward gentler, less invasive approaches first.
- How many cavities are involved? Multiple cavities at once sometimes call for a faster, less invasive option to treat everything in a single visit.
With that in mind, here’s the full range of options, starting with the gentlest.
All Treatments at a Glance
Skip ahead to any row for the full explanation below.
| Treatment | Drilling/Numbing | Visit Length | Best For |
|---|---|---|---|
| Fluoride varnish | None | A few minutes | Early white-spot lesions, before a true cavity forms |
| Silver diamine fluoride | None | A few minutes | Young or anxious kids, multiple cavities, buying time |
| Filling | Local anesthetic | 20 to 30 minutes | Small to moderate cavities with healthy structure remaining |
| Pulpotomy | Local anesthetic | 30 to 45 minutes | Decay that has reached the nerve |
| Stainless steel crown | Local anesthetic | 20 to 30 minutes | Large cavities or teeth after a pulpotomy |
| Extraction | Local anesthetic | Varies | Teeth too damaged or infected to restore |
None of these is universally “better” than another. A good pediatric dentist recommends the least invasive option that still reliably protects the tooth. Cost, number of visits required, and how well your child can sit through treatment all factor into the recommendation too, alongside the clinical picture from the exam and X-rays.
Fluoride Varnish: For the Very Earliest Stage
Invasiveness: None · Visit time: A few minutes · Best for: Early white-spot lesions
Before a cavity fully forms, tooth enamel goes through an early stage of demineralization, sometimes visible as a chalky white spot. At this stage, no drilling or filling is needed at all.
A concentrated fluoride varnish, painted on during a routine visit, can help remineralize the weakened enamel and stop the lesion from progressing into an actual cavity. According to the CDC, fluoride varnish reduces cavities in baby teeth by roughly a third. This is one of the simplest reasons regular checkups matter: catching decay at this reversible stage means avoiding everything below on this list.
Silver Diamine Fluoride (SDF): The No-Drill Option
Invasiveness: None · Visit time: A few minutes · Best for: Young or anxious kids, multiple cavities
Once a cavity has actually formed but hasn’t reached the nerve, silver diamine fluoride is one of the gentlest ways to stop it from getting worse. It’s a liquid, brushed directly onto the cavity, that kills the bacteria causing decay and helps the tooth structure remineralize, all without a drill, needle, or anesthesia.
SDF is especially useful for very young children, kids with dental anxiety, or anyone with several cavities that need addressing quickly. A large 2026 clinical trial funded by the National Institutes of Health found SDF stopped cavity progression at more than twice the rate of a placebo in children as young as one.
The trade-off is cosmetic: it permanently turns the treated area of the tooth dark brown or black. For a full breakdown of how it works and how it compares to other options, see our complete guide to silver diamine fluoride as a no-drill cavity treatment.
Dental Fillings: The Standard Treatment
Invasiveness: Local anesthetic · Visit time: 20 to 30 minutes · Best for: Small to moderate cavities
For a small to moderate cavity, a filling is still the most common and straightforward treatment. The dentist numbs the area, removes the decayed portion of the tooth, and fills the resulting space with a tooth-colored composite material that bonds directly to the healthy tooth structure.
Composite fillings have largely replaced the silver amalgam fillings many parents remember from their own childhood, since they blend in with the natural tooth and require less removal of healthy structure to place. Most filling appointments take well under an hour, and children are back to normal eating within a couple of hours once the numbness wears off.
Fillings work well as long as enough healthy tooth structure remains to support the material. Once decay spreads too far, or gets close to the nerve, a filling alone won’t hold up, which is when dentists move toward one of the options below.
Pulpotomy (Baby Root Canal): When Decay Reaches the Nerve
Invasiveness: Local anesthetic · Visit time: 30 to 45 minutes · Best for: Decay that has reached the nerve
If a cavity has gone deep enough to infect the pulp, the soft nerve tissue inside the tooth, a filling can’t fix it anymore. A pulpotomy removes only the infected pulp in the crown of the tooth while leaving the healthy root pulp intact, then seals and typically crowns the tooth to protect it.
Cleveland Clinic describes it as one of the most routine restorative procedures performed on children’s teeth, far less involved than what most parents picture with an adult root canal. Our detailed guide covers what a pulpotomy actually involves and why baby teeth are worth saving in the first place, including recovery, risks, and what happens if it’s left untreated instead.
Stainless Steel Crowns: Protecting a Weakened Tooth
Invasiveness: Local anesthetic · Visit time: 20 to 30 minutes · Best for: Large cavities or teeth after a pulpotomy
Whether a tooth has had a pulpotomy or simply has a cavity too large for a filling to support, a stainless steel crown is often the next step. It’s a pre-made metal cap that fits over the entire tooth, protecting it from cracking under normal chewing until it’s naturally replaced by the permanent tooth underneath.
Stainless steel crowns have been used in pediatric dentistry for over 75 years, and a Cochrane systematic review found moderate-quality evidence that crowns prevent pain and treatment failure more effectively than fillings over the long term. The American Academy of Pediatric Dentistry considers them the restoration of choice for children at high risk of cavities.
Parents sometimes ask about tooth-colored zirconia alternatives, which look more natural but come with trade-offs in cost and tooth reduction. We compare both options in detail in our guide to stainless steel crowns for kids.
Tooth Extraction: The Last Resort
Invasiveness: Local anesthetic · Visit time: Varies · Best for: Teeth too damaged or infected to restore
When a tooth is too damaged or infected to save through any of the options above, extraction is the final step. This isn’t a first choice; pediatric dentists reach for it only when decay, infection, or trauma has gone too far for restoration to work. The procedure itself is quick, done under local anesthetic, and most kids recover within a day or two.
The more important decision often comes after the tooth is removed: whether a space maintainer is needed. Baby molars in particular hold space for the permanent teeth growing underneath them, and losing one too early can let neighboring teeth drift into that space, crowding out the tooth trying to erupt. Our guide to tooth extraction in children covers the full procedure, recovery, and when a space maintainer becomes necessary.
What Happens If You Wait?
It’s worth being direct about this: cavities don’t resolve on their own, and delaying treatment usually means a more invasive procedure later, not a smaller one.
A small cavity that could have been a simple filling can progress into one needing a pulpotomy or crown. Left long enough, an infection can spread to the surrounding gum or jaw and put the tooth beyond saving. We cover exactly what that progression looks like, stage by stage, in what happens if a cavity in baby teeth goes untreated.
Prevention: The Best Treatment Is No Treatment
Every option on this list exists because a cavity has already formed. The far cheaper, gentler path is avoiding that point altogether:
- Brush twice daily with the right amount of fluoride toothpaste for your child’s age
- Limit sugary snacks and drinks between meals, not just at meals
- Keep up with regular checkups, since these catch problems while they’re still reversible with something as simple as fluoride varnish
- Ask about dental sealants, which add an extra layer of protection on the teeth most prone to decay
HealthyChildren.org, published by the American Academy of Pediatrics, emphasizes that even baby teeth need this kind of consistent care from the very first tooth. Our full guide on how to prevent cavities in children covers these daily habits in more depth.
How to Choose With Your Dentist
Rather than walking in with a preference for one treatment over another, it’s more useful to ask your dentist a few direct questions:
- How deep is the decay?
- How much time is left before this tooth falls out naturally?
- What happens if we choose the more conservative option first?
- What’s the plan if that doesn’t fully resolve it?
Good pediatric dentists are used to explaining trade-offs in plain language, and most cavities have more than one reasonable path forward.
FAQ
Can a cavity in a baby tooth heal on its own?
Only at the very earliest stage, before it becomes a true cavity. Once enamel has actually broken down, professional treatment is needed to stop it from progressing.
Is SDF a replacement for a filling?
Not always. SDF stops a cavity from getting worse, but it doesn’t rebuild the tooth’s structure the way a filling does. Some teeth are left arrested with SDF alone if they’re close to falling out naturally; others still get a filling once the child is ready for it.
How do I know if my child needs a pulpotomy instead of a filling?
This comes down to whether the decay has reached the nerve, which your dentist can usually determine from an exam and an X-ray. Symptoms like nighttime tooth pain or sensitivity that lingers after eating something hot are common signs.
Will my child need to be sedated for any of these treatments?
Most fillings, pulpotomies, and crowns only require local anesthetic. Sedation is generally reserved for very young children, kids with significant anxiety, multiple cavities needing treatment in one sitting, or children with special healthcare needs.
What’s the cheapest way to treat a cavity?
Cost generally follows invasiveness: fluoride varnish and SDF are the least expensive, fillings cost more, and pulpotomies with crowns or extractions with space maintainers cost the most. Treating a cavity early, before it needs a more involved procedure, is almost always the more affordable path overall.
Can one cavity need more than one of these treatments?
Yes, often in sequence rather than all at once. A deep cavity might get SDF applied first to stop it from worsening while a fuller treatment plan is arranged, then a pulpotomy and crown once the child is ready for a longer appointment.
How many baby teeth typically get cavities?
It varies widely by child, but early childhood caries remains one of the most common chronic conditions in young children worldwide. This is exactly why the prevention habits above matter as much as knowing the treatment options.
The Bottom Line
There’s no single “right” treatment for a cavity; there’s the right treatment for that specific tooth, at that specific stage, for that specific child. The good news is that pediatric dentistry now offers more gentle, no-drill options than ever before, so a cavity caught early rarely means the intimidating experience many parents remember from their own childhood.
Not sure which treatment is right for your child’s cavity? Book a visit with The Shine Dental Clinic in Lalitpur and we’ll walk you through the options.