Getting braces while you still have baby teeth is not only possible, it’s sometimes the recommended approach. Orthodontists call this “Phase 1” or interceptive treatment, and it typically happens during the mixed dentition stage, when a child has a combination of baby teeth and permanent teeth. The goal isn’t to perfectly straighten every tooth. It’s to correct jaw and alignment problems early, before they become harder and more invasive to fix later.
The American Association of Orthodontists recommends that all children be screened by an orthodontist by age 7. That surprises many parents, since most kids still have plenty of baby teeth at that age. But certain problems are easier to address while the jaw is still growing, and waiting until every adult tooth arrives can mean missing that window.
Why an Orthodontist Would Place Braces Early
Not every child with baby teeth needs braces. Phase 1 treatment is reserved for specific conditions where early action prevents a bigger problem down the road. The most common reasons include posterior crossbites (where the upper back teeth sit inside the lower teeth), underbites that tend to worsen during adolescent growth, open bites caused by thumb-sucking or tongue thrust habits, and significant crowding where the jaw clearly lacks room for incoming adult teeth.
Posterior crossbites in baby teeth are surprisingly common, showing up in 8 to 22 percent of young children. These crossbites originate from a narrow upper jaw, and if left untreated, they can force the lower jaw to shift to one side during biting. An underbite, meanwhile, is one of the strongest cases for early treatment because it tends to get worse as a child grows through puberty. Treating it during the baby or early mixed dentition stage allows the orthodontist to get the maximum effect from appliances that influence jaw growth.
Protruding upper front teeth are another reason for early intervention, though the justification is more practical than structural. Kids with front teeth that stick out significantly face a higher risk of dental trauma from falls or sports injuries, and some experience social difficulties from teasing. If that protrusion also comes with a crossbite, deep bite, or open bite, the case for early treatment becomes stronger.
What the Braces Actually Look Like
When people hear “braces with baby teeth,” they often picture a full mouth of metal brackets on a six-year-old. That’s rarely what happens. Phase 1 treatment usually involves partial braces, palatal expanders, or removable appliances rather than a full set of brackets on every tooth.
One of the most common setups is called a “2 × 4” appliance: brackets on the four upper front teeth (permanent incisors) and bands on two back molars, connected by an archwire. This targets the front teeth and uses the molars as anchors without involving baby teeth in between. For crossbites caused by a narrow upper jaw, an orthodontist may use a palatal expander, a device fixed to the upper molars that gradually widens the palate over weeks. Some children receive removable appliances instead of fixed ones. Both approaches work, though fixed appliances tend to cause a bit more discomfort during eating in the first few days, while removable ones can temporarily affect speech.
Clear aligners are also entering the picture for younger patients. A randomized trial comparing the 2 × 4 appliance to clear aligners in children found both were equally effective for resolving mild to moderate crowding of the upper front teeth, with similar treatment times of about eight months. Aligners do require consistent wear, though, which can be a challenge for younger kids.
What Happens When a Baby Tooth Falls Out During Treatment
This is one of the most common concerns parents have, and the answer is straightforward: it’s expected and planned for. Orthodontists know which baby teeth are likely to come loose during the treatment timeline. If a baby tooth with a bracket falls out, the orthodontist simply waits for the permanent tooth to come in and then attaches a new bracket to it. Treatment plans account for this natural transition, so a loose or lost baby tooth doesn’t derail progress.
In some cases, losing a baby tooth is actually part of the plan. If baby teeth are blocking the path of a permanent tooth trying to come in, the orthodontist may coordinate with an oral surgeon to remove the over-retained baby tooth. This is especially relevant for upper canines (eyeteeth), which are among the most commonly impacted permanent teeth. If the eruption path is cleared and space is opened by age 11 or 12, there’s a good chance the impacted tooth will erupt on its own. Wait until age 13 or 14, and the tooth often becomes stuck, requiring surgical exposure and a longer, more involved process to guide it into place.
How Early Treatment Guides Permanent Teeth
One of the most important functions of Phase 1 braces is creating the conditions for adult teeth to arrive in better positions on their own. A panoramic X-ray taken around age 7 lets the orthodontist count developing teeth, spot any that are missing or extra, and identify teeth that appear to be growing toward the wrong position.
When crowding is the issue, expanding the upper jaw or strategically managing space can give permanent teeth room to erupt without becoming impacted or severely crooked. Think of it like clearing a path: if you widen a narrow hallway before the furniture arrives, everything fits more easily. Maxillary expansion is often the first step when a child has both a crossbite and crowding. The decision about whether teeth will eventually need to be extracted gets postponed until after expansion, because the added space sometimes makes extractions unnecessary.
Will Your Child Still Need Braces Later?
Phase 1 treatment does not guarantee your child will skip braces as a teenager. Most children who undergo early treatment still need a second phase (Phase 2) once all their permanent teeth have come in, typically in the early teen years. The difference is that Phase 2 tends to be shorter, simpler, and less likely to involve extractions or jaw surgery.
Early intervention corrects the structural foundation: jaw width, bite relationship, and space for incoming teeth. Phase 2 then fine-tunes the alignment and fit of the permanent teeth. The two phases are usually separated by a rest period during which the orthodontist monitors tooth eruption without any active appliances, though a retainer may be used to hold early corrections in place.
For some conditions, particularly underbites caught very early or crossbites corrected in the baby teeth, the second phase may be minimal or occasionally unnecessary. But going in, it’s realistic to expect that Phase 1 is the first half of a two-part process rather than a standalone fix.
What Age Is Best for Phase 1
The ideal time to begin Phase 1 treatment is in the early mixed dentition, typically around ages 7 to 9, once the upper permanent incisors (the four front teeth) have come in. This timing gives the orthodontist permanent teeth to work with on the front end and takes advantage of the period when the jaw is still growing and most responsive to guidance.
For underbites specifically, treatment can start even earlier, during the full baby teeth stage, because the skeletal mismatch benefits from the longest possible window of growth modification. For crowding and crossbites, the early mixed dentition is usually sufficient. Starting too early, before there’s a clear problem to solve, means a longer total treatment time and more appointments without a meaningful benefit. That’s why the age-7 screening is a diagnostic visit, not necessarily a treatment visit. Many kids examined at 7 are simply monitored until the right moment to intervene, if intervention is needed at all.