Getting braces younger is generally better from a biological standpoint. Children and teens have less dense bone, faster cellular activity, and still-growing jaws, all of which make teeth easier to move and certain corrections possible without surgery. That said, adults get excellent results from braces too, and roughly 1.91 million adults in the United States are currently in orthodontic treatment. The real answer depends on what needs to be fixed and when the problem is caught.
Why Younger Patients Respond Faster
The core advantage of starting younger is biology. In adolescents, the bone surrounding tooth roots is less dense than in adults, and the cells responsible for breaking down and rebuilding bone are more active. This means teeth move more quickly, especially in the first weeks of treatment. Research comparing younger and older subjects found that adults show slower tooth movement during this early phase because they have fewer bone-resorbing cells at work and a denser bone structure overall.
The tissue connecting teeth to bone, called the periodontal ligament, also behaves differently with age. In younger patients, this tissue reorganizes quickly under pressure. In adults, it takes longer to remodel, shows more inflammation, and contains more aged cells. None of this makes adult treatment impossible, but it does mean the biological machinery works harder and slower.
These differences show up in treatment timelines. Teens typically finish orthodontic treatment in 12 to 24 months, while adults often need 18 to 36 months for comparable corrections.
Corrections That Only Work While You’re Growing
Some orthodontic problems aren’t really about teeth at all. They’re about the size and position of the jaw bones. A narrow upper jaw, for instance, can be widened in children using a palatal expander, a device that gradually separates the two halves of the palate along a natural seam. This works because that seam hasn’t fully fused yet in younger patients. Once facial bones are fully developed, typically by the late teens or early twenties, the same correction requires surgery.
This is the strongest argument for early evaluation. The American Association of Orthodontists recommends every child be screened by age 7, when enough permanent teeth have come in to spot jaw misalignment, crowding, crossbites, and eruption problems. An orthodontist can also use X-rays at this age to check for missing, extra, or impacted teeth that aren’t visible yet.
Not every child who gets screened at 7 needs treatment at 7. Most will simply be monitored. But for kids with significant jaw discrepancies or bite problems, early intervention (sometimes called Phase 1 treatment) can guide bone growth while it’s still happening. The goal is to intercept developing problems, create space for incoming permanent teeth, and reduce the severity of treatment needed later. A second phase of braces during the teen years then fine-tunes tooth alignment.
When Waiting Is Fine
Two-phase treatment is reserved for cases where an orthodontist determines there’s a severe jaw problem, a serious bite issue, or a risk of damage to permanent teeth. For straightforward crowding or mild misalignment, there’s no proven benefit to starting before all the permanent teeth are in. Many orthodontists prefer to wait until ages 11 to 14, when most adult teeth have erupted, and handle everything in a single round of treatment.
Starting too early without a clear clinical reason can mean a longer total time in braces, more appointments, and higher overall costs. The key is getting that initial evaluation at age 7 so an orthodontist can determine whether early action is genuinely needed or whether monitoring and waiting is the smarter path.
What Adults Should Expect
If you missed the window for childhood treatment, braces still work well in adulthood. About 30% of orthodontic patients treated by AAO members are adults. The mechanics are the same: brackets, wires, or clear aligners apply gentle force, and bone remodels around the teeth in response. It just takes longer and requires more patience.
Adults also face a higher tendency for teeth to shift back toward their original positions after treatment. Because bone and tissue remodel more slowly with age, orthodontists typically recommend longer retention periods, meaning you’ll likely wear a retainer for years or even indefinitely to maintain results.
There are practical trade-offs too. Adults are more likely to have existing dental work like crowns, bridges, or missing teeth that complicate treatment planning. Gum disease, which is more common with age, needs to be under control before braces go on. These aren’t dealbreakers, but they can add steps and time to the process.
The Psychological Side
Motivation looks different at different ages. A study published in the American Journal of Orthodontics and Dentofacial Orthopedics found that adults experience a greater negative psychosocial impact from crooked teeth than children do. Adults are more aware of how their teeth affect their appearance and oral function, and that awareness tends to make them highly motivated patients who follow instructions carefully.
Children and teens, on the other hand, may not care much about their teeth yet, which can make compliance with rubber bands, retainers, and oral hygiene more of a battle. But the biological advantages of youth often compensate for less-than-perfect cooperation. For adults, strong motivation is a genuine asset that helps offset the slower biology.
Insurance and Cost Differences
Dental insurance treats children and adults differently when it comes to orthodontics. Children’s dental plans available through the health insurance marketplace cover orthodontic care for kids under 19, though coverage is generally limited to cases involving functional problems like difficulty chewing or speaking. After age 19, you’ll need an adult dental plan, and orthodontic coverage for adults is less common and often comes with lower benefit caps.
Dental plans are also allowed to set lifetime maximum dollar amounts for coverage, unlike medical insurance plans under the Affordable Care Act. This means even with insurance, a significant portion of treatment cost may come out of pocket, and that gap tends to be larger for adults. Getting treatment during childhood, when insurance options are broader and jaw corrections can be done without surgery, is often the more cost-effective path.
The Bottom Line on Timing
For jaw-related problems, crossbites, and severe crowding, younger is clearly better. These issues are easier, faster, and less expensive to fix while the bones are still growing. For straightforward tooth alignment, the ideal window is the early teen years when most permanent teeth are in and biology is still on your side. Adults get great results too, but should expect longer treatment, longer retention, and potentially higher costs. Whatever your age, the single best move is getting an evaluation sooner rather than later, since the options only narrow with time.