Most people wear braces for about 18 to 24 months. A large systematic review of orthodontic studies found a mean treatment time of roughly 20 months with fixed appliances, though individual cases ranged from 14 to 33 months depending on complexity. When cases were evaluated against American Board of Orthodontics standards, the average climbed to about 25 months. Your specific timeline depends on how far your teeth need to move, your age, and how well you follow your orthodontist’s instructions.
Why Treatment Takes as Long as It Does
Braces work by applying steady pressure that triggers your bone to slowly remodel around each tooth. The bone on one side of the tooth breaks down while new bone forms on the other side, allowing the tooth to shift into its new position. This biological process can only happen so fast. Clinical measurements show teeth move between 0.5 and 2.4 millimeters per month during active treatment. That might not sound like much, but a tooth that needs to travel 5 or 6 millimeters requires several months of careful, sustained pressure just for that single movement.
Pushing teeth faster than the bone can remodel risks damaging the roots or the surrounding tissue. That biological speed limit is the main reason no orthodontist can promise a six-month fix for a complex case.
What Makes Some Cases Take Longer
The severity of your bite problem is the single biggest factor in treatment length. Mild crowding or slightly crooked front teeth can sometimes be resolved in 12 to 14 months. A significant overbite, underbite, or crossbite adds complexity and time. Research comparing patients with moderate versus severe bite misalignment found that more severe cases took significantly longer to treat and had lower treatment efficiency overall, even with the same type of braces.
Extractions also extend the timeline. When teeth need to be removed to make room, the braces then have to close those gaps, which can add months. Canine retraction alone, a common step after extracting premolars, typically takes about six months with standard mechanics.
Other factors that influence your timeline:
- Age. Children and teens often finish faster because their bones are still growing and remodel more easily. Adults tend to land on the longer end of the range.
- Compliance. Skipping appointments, breaking brackets, or not wearing elastics as directed can add months to treatment.
- Tooth anatomy. Impacted teeth (teeth trapped under the gum) or teeth with unusual root shapes require more careful, slower movement.
Do Different Braces Types Change the Timeline?
Self-ligating brackets (the kind that clip the wire in place instead of using tiny rubber bands) reduce the time you spend in the chair at each appointment, since wires are faster to swap out. But research has not shown they meaningfully shorten your overall treatment duration. The months you wear braces are driven by how fast your biology allows teeth to move, not by the bracket design holding the wire.
Clear aligners like Invisalign work on a similar timeline to traditional braces for mild to moderate cases. For complex cases involving significant bite correction or vertical tooth movement, fixed braces sometimes finish faster because they offer the orthodontist more precise control.
Can Anything Speed Up Treatment?
Several surgical techniques can accelerate tooth movement by stimulating the bone to remodel faster. One approach involves making small cuts or perforations in the bone near the teeth being moved. Studies on these procedures report treatment times dropping by a third to nearly half. One technique reduced the canine retraction phase from six months to under one month. Another made overall tooth movement 1.5 to 2 times faster than conventional braces alone.
These procedures are real, but they involve minor oral surgery and aren’t appropriate or necessary for most patients. They’re typically reserved for adults who need significant tooth movement and want to compress the timeline. Your orthodontist can tell you whether you’re a candidate.
Devices that use vibration or light therapy to speed things up are marketed directly to patients, but the clinical evidence behind them is far less convincing than the surgical options.
What Happens After Braces Come Off
Getting your braces removed isn’t the end of the process. You’ll transition into a retainer, which holds your teeth in their new positions while the bone fully solidifies around them. Without a retainer, teeth will gradually drift back toward their original positions, sometimes within weeks.
Most orthodontists prescribe full-time retainer wear for four months to a year after braces come off. You remove the retainer only to eat and brush. After that initial phase, you’ll typically shift to nighttime-only wear. Some people wear a nighttime retainer for a few more months; others are advised to continue indefinitely. The exact schedule depends on how stable your teeth appear at follow-up visits and how much movement your orthodontist considers likely.
Some orthodontists bond a thin wire to the back of your front teeth as a permanent retainer. This stays in place around the clock without any effort on your part, though it does require careful flossing. Whether you get a removable retainer, a bonded wire, or both varies by practice and by the specifics of your case.