Lingual braces are used to straighten teeth and correct bite problems while remaining completely hidden from view. They work the same way as traditional metal braces, but the brackets are bonded to the back surfaces of your teeth (the side facing your tongue) instead of the front. This makes them the only fixed orthodontic option that’s truly invisible when you smile.
What Lingual Braces Treat
Lingual braces can treat the same range of orthodontic problems as conventional braces. Research confirms that a lingual appliance has the same capacity to align teeth as one placed on the front surfaces. That means they handle crowding, gaps between teeth, overbites, underbites, crossbites, and teeth that are rotated or tilted out of position.
Where lingual braces have a particular edge over clear aligners is in more complex tooth movements. Fixed braces in general are more effective at producing proper occlusal contacts (how your upper and lower teeth meet), controlling the angle and tilt of individual teeth, and maintaining alignment long-term after treatment. Clear aligners tend to fall short in these areas, with one study finding that patients treated with aligners relapsed more in tooth alignment after treatment ended. For mild to moderate cases like simple crowding or minor spacing, both options work well, but lingual braces offer more precision when the orthodontic problem is severe or involves significant bite correction.
Who They’re Designed For
The primary reason people choose lingual braces is aesthetics. They’re popular with adults and professionals who want effective orthodontic treatment without visible hardware. Because the brackets sit behind the teeth, no one can see them during normal conversation, eating, or smiling.
They’re also a good fit for people who need the power of fixed braces but can’t commit to the discipline clear aligners require. Aligners need to be worn 20 to 22 hours a day and removed for every meal, which means compliance is a factor. Lingual braces, like any fixed appliance, work around the clock without requiring you to remember to put them back in.
Not everyone is an ideal candidate, though. Early experiments with lingual brackets in the 1970s were limited to the lower jaw because of concerns that biting forces would knock brackets off the upper front teeth. Modern adhesives and custom-fit designs have largely solved that problem, but your orthodontist will still evaluate factors like tooth size and shape. The back surfaces of teeth are far more irregular and inconsistent than the front, which makes bracket placement more technically demanding.
How Custom Lingual Systems Work
Modern lingual braces aren’t off-the-shelf. Leading systems use 3D digital scans and computer-aided design to manufacture brackets that are custom-shaped for each individual tooth. This matters because the lingual surface varies dramatically from tooth to tooth, and a poor fit would compromise both comfort and effectiveness. Brackets are typically made from a gold alloy, chosen for its biocompatibility and smoother feel against the tongue.
Because the brackets sit farther from the outer surface of the teeth, adjustments to one dimension of tooth position (like tilt) can affect another dimension (like height). This is an engineering challenge unique to lingual orthodontics and one of the reasons custom fabrication and experienced practitioners are important for good outcomes.
Treatment Duration
Lingual braces take roughly the same amount of time as traditional front-facing braces. A study comparing two major customized lingual systems found an overall mean treatment time of about 21 months. For context, conventional braces typically take 18 to 24 months depending on the complexity of the case.
Simpler cases finished faster. Mild to moderate malocclusions treated with one newer lingual system averaged about 18 months, while more complex cases averaged around 20 to 21 months. The most complex cases treated with an older system took closer to 30 months, so the specific system your orthodontist uses and the severity of your bite issues both influence the timeline.
What the Adjustment Period Feels Like
The most common complaint with lingual braces is tongue irritation. Because the brackets sit right where your tongue naturally rests, discomfort in that area is significantly more likely than with traditional braces. A meta-analysis comparing lingual and front-facing braces found that tongue pain was roughly 32 times more likely with lingual placement. On the flip side, lingual braces cause far less irritation to your cheeks and lips, which is where traditional braces tend to cause sores.
Speech changes are another adjustment. Lingual brackets are about 8.6 times more likely to cause speech difficulty compared to front-facing braces, with sounds like “s,” “t,” and “d” most commonly affected. About 56% of all braces patients experience some speech alteration, and lingual wearers are on the higher end of that range. The good news is that these effects typically fade within a couple of weeks as your tongue adapts to the hardware.
Eating difficulty is also more common early on, with lingual braces roughly 3.6 times more likely to cause chewing issues than conventional braces. Food impaction, where food gets stuck around the brackets, is about 25% more prevalent. All of these side effects tend to decrease gradually over time.
Cleaning and Maintenance
Keeping lingual braces clean requires extra effort. Plaque and calculus buildup on lingual brackets is equal to or higher than what accumulates on front-facing braces, and the location makes it harder to see and reach problem areas. You can’t simply glance in the mirror to check for trapped food.
A water flosser is especially useful for flushing debris from behind your teeth. Interdental brushes help clean around individual brackets and under the archwire. Professional cleanings become more important during treatment, though dental hygienists need to be careful using ultrasonic cleaning tools near small lingual brackets, as the vibrations can affect the bond between the bracket and the tooth.
Cost Compared to Other Options
Lingual braces are the most expensive orthodontic option, typically running $8,000 to $10,000 in the United States. That’s roughly double the cost of traditional metal braces and noticeably more than clear aligners. The higher price reflects the custom manufacturing process, the specialized training required to place and adjust them, and the longer chair time at each appointment. Dental insurance that covers orthodontics will usually apply the same lifetime benefit regardless of which type of braces you choose, but it’s unlikely to cover the full difference in cost.