A deep bite is corrected by moving teeth vertically, either pushing front teeth up into the jawbone, encouraging back teeth to grow downward, or a combination of both. The right approach depends on your facial structure, how severe the overlap is, and whether you’re still growing. Most cases are treated with braces or clear aligners over roughly 18 to 24 months, though some skeletal deep bites require jaw surgery.
In a normal bite, the upper front teeth overlap the lower front teeth by about 30%, or roughly one-third of the lower tooth’s visible height. A deep bite means that overlap is significantly greater, sometimes to the point where the lower teeth bite into the roof of the mouth.
Why Deep Bites Are Worth Correcting
A deep bite isn’t just cosmetic. The most well-documented consequence is accelerated tooth wear. In one study of 275 patients, those with moderate to severe deep bites were over four times more likely to have extensive enamel wear compared to people with normal overlap. That wear tends to concentrate on the biting edges of the front teeth, thinning them over years and making them more vulnerable to chipping and sensitivity.
When the lower teeth press repeatedly into the palate or gum tissue behind the upper teeth, chronic irritation and sore spots can develop. Deep bites also change how chewing forces distribute across your teeth, putting disproportionate stress on the front teeth while the back teeth don’t fully engage. Interestingly, research has not found a strong link between deep bites alone and jaw joint pain or disc problems, so if your orthodontist recommends treatment, it’s primarily about protecting your teeth and soft tissues rather than preventing TMJ disorders.
How Orthodontists Open a Deep Bite
There are three basic mechanical strategies for reducing a deep bite, and most treatment plans use more than one.
- Front tooth intrusion: Pushing the upper or lower front teeth upward into the bone. This is the preferred approach when you show too much gum tissue when you smile or when the front teeth have over-erupted.
- Back tooth extrusion: Encouraging the molars and premolars to erupt slightly downward, which levels the arch and opens the bite. This works best when you have a short lower face and don’t show much of your upper teeth at rest.
- Front tooth proclination: Tipping the front teeth slightly forward, which reduces how deeply they overlap. This is often a secondary effect of other mechanics rather than the primary goal.
Your orthodontist chooses between these based on your facial proportions. Extruding the back teeth increases the lower face height slightly, which can improve a “short face” appearance. Intruding the front teeth reduces gummy smiles. Getting this decision wrong can make facial aesthetics worse even while fixing the bite, which is why deep bite cases benefit from careful planning.
Braces for Deep Bite Correction
Traditional braces remain the most versatile option for deep bites, especially severe ones. Several specific tools work within a braces setup to open the bite.
Bite turbos (also called bite ramps or bite blocks) are small mounds of acrylic or composite bonded to the back of the upper front teeth or the chewing surface of the back teeth. They stop you from biting down fully, which creates a gap between the back teeth. That gap gives the molars room to erupt slightly, leveling the bite over time. They feel awkward for the first week or two but become easy to ignore.
Reverse curve archwires are specially shaped wires that exert a gentle upward force on the front teeth and a downward force on the back teeth simultaneously. Research shows they open the bite primarily by extruding the molars and slightly flaring the incisors. Utility arches work similarly but are designed to intrude the upper front teeth more specifically, which makes them useful for patients with excessive gum display.
Clear Aligners for Deep Bites
Clear aligners like Invisalign can effectively treat deep bites, and the technology has improved significantly. The system uses precision bite ramps, which are built-in bumps on the tongue side of the upper aligners that extend up to 3 mm. These function like bite turbos in braces: when you close your mouth, the lower front teeth hit the ramps, separating the back teeth and allowing them to erupt.
Clinical results show that aligners with and without bite ramps reduced overbite by 3 to 3.8 mm on average, comparable to what fixed braces achieve. One study found the average treatment time with aligners was about 21 months for deep bite cases. The aligners also gradually reshape the arch using a programmed reverse curve in the lower trays, combined with torque adjustments on the upper front teeth.
One nuance worth knowing: bite ramps affect how forces transfer through the front teeth, which can counteract some of the planned tooth movements. Your provider may need to account for this in the digital treatment plan. Aligners work well for mild to moderate deep bites, but very severe cases or those requiring precise intrusion of specific teeth may still be better served by braces with specialized mechanics.
Treatment for Children and Teens
Deep bites in children can sometimes be addressed earlier and more simply because the jaw is still growing. For dental deep bites (where the issue is tooth position rather than bone structure), treatment may wait until the permanent teeth are mostly in. But for skeletal deep bites, where the jaw itself is shaped in a way that creates the excessive overlap, functional appliances can redirect growth while the child is still developing.
Appliances like the Twin Block, activator, and bionator are removable devices that reposition the lower jaw and encourage the back teeth to erupt, opening the bite naturally during growth. These work best during the pubertal growth spurt, typically between ages 10 and 14. The advantage of early treatment is that it can reduce the severity of the problem enough to make later braces treatment shorter and less complex, or in some cases eliminate the need for it altogether.
When Surgery Becomes Necessary
Jaw surgery (orthognathic surgery) is reserved for skeletal deep bites that are too severe for orthodontics to compensate for. This typically means the upper or lower jawbone itself is positioned in a way that creates the deep overlap, and moving teeth alone can’t produce a stable result.
Clinical guidelines point to several indicators that surgery may be needed: a deep overbite where the lower teeth are causing irritation to the palate or gum tissue of the opposite arch, vertical facial skeletal measurements that fall two or more standard deviations from normal, or significant jaw asymmetry greater than 3 mm. Surgery is also considered when the bite problem causes functional impairment, such as persistent difficulty chewing or swallowing that can’t be explained by other medical causes.
Surgery is almost always combined with orthodontic treatment. Braces or aligners are typically worn before and after the procedure to fine-tune the tooth positions around the new jaw alignment. The total treatment timeline, including pre-surgical orthodontics, surgery, and post-surgical finishing, generally runs two to three years.
Keeping Your Results After Treatment
Deep bites have a well-known tendency to relapse. The muscles and soft tissues that contributed to the deep bite in the first place exert forces that try to push the teeth back toward their original positions, which makes retention especially important.
Research comparing retention methods shows clear differences. In a study of 150 patients, those with permanent retainers (thin wires bonded behind the front teeth) experienced an average relapse of just 0.2 mm in the front teeth and 0.1 mm in the back. Essix retainers, the clear plastic type, allowed 0.8 mm of anterior relapse. Hawley retainers, the classic wire-and-acrylic removable type, performed worst at 1.0 mm of anterior relapse. The differences were statistically significant.
For deep bite cases specifically, many orthodontists recommend a permanent bonded retainer on the lower front teeth combined with a removable retainer worn at night. The bonded wire provides continuous hold against the vertical forces that drive relapse, while the removable retainer maintains the overall arch shape. Compliance matters enormously with removable retainers. If you stop wearing them too soon, the bite can deepen again within months, partially undoing years of treatment.