What Is a Deep Bite and Why Does It Need Treatment
In a normal bite, the upper front teeth overlap the lower front teeth by about 1 to 2 millimeters, covering roughly one-third of the lower teeth. A deep bite occurs when this overlap is significantly greater, sometimes to the point where the lower teeth are completely hidden behind the upper teeth or even bite into the gum tissue behind the upper teeth.
Deep bites are measured as a percentage of the lower tooth that is covered. An overlap of 50% or more is generally considered a moderate to severe deep bite. Orthodontists also measure deep bite in millimeters of vertical overlap, called overbite. A measurement above 4 millimeters is typically considered excessive.
Left untreated, a deep bite can cause several problems over time. The lower front teeth may wear against the backs of the upper front teeth, leading to enamel erosion and chipping. In severe cases, the lower teeth can contact the gum tissue behind the upper teeth, causing chronic irritation, tissue trauma, and even bone loss. Deep bites can also contribute to jaw pain and temporomandibular joint (TMJ) discomfort.
What Causes a Deep Bite
Understanding the cause of your deep bite helps your orthodontist determine the best treatment approach. Deep bites can result from dental factors, skeletal factors, or a combination of both.
Dental Causes
A dental deep bite occurs when the teeth themselves are positioned in a way that creates excessive overlap, but the jaw bones are in a relatively normal relationship. Common dental causes include overeruption of the front teeth (they have grown too far out of the bone), missing back teeth (which allows the bite to collapse and the front teeth to over-close), and crowding or misalignment that tips the front teeth inward.
Dental deep bites are often the most treatable with Invisalign because the correction involves moving teeth rather than changing the position or growth of the jaw bones.
Skeletal Causes
A skeletal deep bite occurs when the upper jaw, lower jaw, or both are positioned or shaped in a way that creates excessive vertical overlap. For example, a lower jaw that is shorter than average or rotated upward can contribute to a deep bite, even if the teeth themselves are relatively well-aligned.
Skeletal deep bites are more challenging to treat with aligners alone because the underlying jaw relationship contributes to the problem. Depending on severity, your orthodontist may recommend braces, functional appliances, or in some adult cases, a combination of orthodontics and jaw surgery.
Habits and Tooth Wear
Habits such as nail biting, pen chewing, or clenching and grinding (bruxism) can worsen a deep bite over time. These habits place excessive force on the front teeth and can cause them to shift position. Additionally, if back teeth are worn down from grinding, the back of the bite loses height and the front teeth over-close, deepening the bite.
How Invisalign Treats a Deep Bite
Invisalign uses a series of custom-made clear plastic aligners to gradually move teeth into their corrected positions. For deep bite cases, the system uses specific features designed to address vertical overlap.
Precision Bite Ramps
One of the key tools Invisalign uses for deep bite correction is precision bite ramps. These are small raised areas built into the aligner behind the upper front teeth. When you bite down, your lower front teeth contact these ramps, which helps the front teeth intrude (move upward into the bone) and allows the back teeth to erupt slightly to level the bite.
Bite ramps are effective for mild to moderate deep bites and are one of the features that have made Invisalign increasingly capable of treating overbite problems that previously required braces.
SmartForce Attachments and Elastics
SmartForce attachments are small tooth-colored bumps bonded to specific teeth. They give the aligners something to grip, allowing more precise control over tooth movement. For deep bite cases, attachments help the aligner apply the right direction and amount of force to intrude the front teeth or tip the back teeth into better position.
In some cases, your orthodontist may prescribe elastics (small rubber bands) that hook from the upper aligners to the lower aligners. Elastics can help correct the jaw relationship and are particularly useful in moderate deep bite cases where additional vertical control is needed.
Staged Treatment and Refinements
Invisalign deep bite treatment is planned digitally before treatment begins. Your orthodontist uses the ClinCheck software to map out each stage of tooth movement. You will receive a new set of aligners every 1 to 2 weeks, with each set making small adjustments.
Most deep bite cases require 20 to 40 sets of aligners over 12 to 24 months. After the initial set of aligners is completed, refinement aligners may be needed to fine-tune the result. Refinements are a normal part of Invisalign treatment and are typically included in the original treatment fee.
Compliance and Aftercare During Treatment
Unlike braces, which are fixed to the teeth and work around the clock, Invisalign requires patient compliance to be effective. You must wear your aligners for 20 to 22 hours per day, removing them only to eat, drink anything other than water, and brush your teeth.
Inconsistent wear is the most common reason Invisalign treatment takes longer than planned or fails to achieve the desired result. If aligners are worn fewer than 20 hours per day, teeth may not track properly into the planned positions, and your orthodontist may need to order additional aligners or consider switching to braces.
During treatment, attend all scheduled appointments so your orthodontist can monitor progress and make adjustments. Keep your aligners clean by rinsing them each time you remove them and brushing them gently with a soft toothbrush. Do not use hot water, which can warp the plastic.
After treatment is complete, you will need to wear a retainer to prevent your teeth from shifting back toward their original positions. Retainers are a permanent part of orthodontic treatment regardless of whether you used Invisalign or braces. Your orthodontist will advise on whether a fixed or removable retainer is best for your case.
Cost of Invisalign for Deep Bite Correction
The cost of Invisalign treatment for a deep bite typically ranges from $3,500 to $7,000, with most cases falling between $4,500 and $6,500. This is comparable to the cost of traditional braces for similar cases.
Several factors affect the total cost. More severe deep bites require more aligners and longer treatment, which increases the fee. Geographic location matters, as costs tend to be higher in major metropolitan areas. The experience level of the orthodontist and the specific Invisalign package (Comprehensive, Moderate, or Lite) also influence pricing.
Many orthodontic offices offer payment plans that spread the cost over the duration of treatment, often with no interest if paid within the agreed timeframe. Dental insurance plans that include orthodontic benefits typically cover a portion of Invisalign treatment, often between $1,000 and $2,500 of the total fee.
Flexible spending accounts (FSAs) and health savings accounts (HSAs) can also be used to pay for Invisalign with pre-tax dollars, which effectively reduces the cost. Ask your orthodontist's office about all available payment and financing options during your consultation.
Note: All costs mentioned are estimates based on national averages and may not reflect pricing in your area. Actual fees depend on your specific clinical situation, provider, and location.
When to See an Orthodontist About a Deep Bite
You should see an orthodontist if you notice that your upper front teeth cover most or all of your lower front teeth when you bite down. Other signs that your deep bite may need treatment include visible wear or chipping on the edges of your front teeth, soreness or irritation on the roof of your mouth or the gum tissue behind your upper teeth, jaw pain or clicking, and difficulty biting into foods with your front teeth.
An orthodontist is the specialist best qualified to diagnose the type and severity of your deep bite and to recommend the most effective treatment. While general dentists can provide Invisalign, orthodontists have 2 to 3 additional years of specialized training in tooth movement and jaw alignment.
The American Association of Orthodontists recommends that children have their first orthodontic evaluation by age 7, which allows early detection of developing deep bites. For adults, there is no upper age limit for deep bite correction. Many adults successfully complete Invisalign treatment for deep bites in their 30s, 40s, 50s, and beyond.
Find an Orthodontist Near You
If you suspect you have a deep bite, an orthodontist can perform a thorough evaluation and tell you whether Invisalign is a viable option for your specific case.
Use our directory to find a board-certified orthodontist in your area who has experience treating deep bites with Invisalign and other approaches.
Search Orthodontists in Your Area