A deep bite — sometimes called an excessive overbite — is when the upper front teeth overlap too far down over the lower front teeth, in some cases covering them almost entirely when biting together. It’s corrected with braces, clear aligners, or in some cases a bite plate or growth-guiding appliance, depending on a patient’s age and how much the upper and lower jaws themselves are contributing to the overlap.
What Exactly Is a Deep Bite?
A healthy bite has the upper front teeth overlapping the lower front teeth by a small amount — usually just a couple of millimeters. In a deep bite, that overlap is significantly more than normal, sometimes to the point where the lower front teeth are barely visible when the jaw is closed, or where the lower teeth are actually biting into the gum tissue behind the upper front teeth.
What Causes a Deep Bite?
Deep bites typically develop from a combination of genetics and how the jaws and teeth grow relative to each other:
- Jaw size mismatch — a lower jaw that’s smaller or set further back relative to the upper jaw
- Excessive eruption of the front teeth, where the upper or lower front teeth come in further than they should relative to the back teeth
- Missing or undersized back teeth, which can let the bite collapse and deepen over time
- Inherited jaw and facial growth patterns, which is why deep bites often run in families
Why Deep Bites Are Worth Correcting
Beyond appearance, an uncorrected deep bite can cause the lower front teeth to repeatedly strike the roof of the mouth or gum tissue behind the upper teeth, leading to gum irritation or recession over years of contact. It can also concentrate excessive wear on the front teeth and, in more significant cases, contribute to jaw joint (TMJ) discomfort from the altered bite mechanics.
How Is a Deep Bite Corrected?
In Growing Children
If a jaw growth discrepancy is contributing, catching it early allows growth-guiding appliances to help balance how the upper and lower jaws are developing relative to each other — one of the reasons early orthodontic evaluations matter even before all the permanent teeth arrive.
With Braces or Clear Aligners
In most adolescent and adult cases, braces or clear aligners correct a deep bite by leveling the front teeth and, when needed, slightly adjusting how the back teeth meet to open up the bite. Small bite ramps or turbos are sometimes added temporarily to keep the front teeth from over-erupting during treatment.
In More Complex Adult Cases
Significant jaw-size mismatches in adults who’ve finished growing sometimes require combining orthodontic treatment with restorative dental work, or in rare, severe cases, jaw surgery, to fully correct the bite relationship.
Our team at Davis & Goldberg Orthodontics maps out exactly how much of a deep bite is coming from tooth position versus jaw growth using digital scans and X-rays, since that distinction shapes which approach makes the most sense for your specific bite.
Deep Bite and Jaw Joint (TMJ) Comfort
Because a deep bite changes how the upper and lower teeth meet, it can also change how the jaw joint itself is loaded during everyday biting and chewing. Some patients with a significant, long-standing deep bite report jaw fatigue, clicking, or discomfort that improves once the bite is corrected and the jaw can close in a more balanced position. Not every deep bite causes jaw joint symptoms, and not every jaw joint symptom is caused by a deep bite, but it’s a connection worth mentioning to your orthodontist if you’re experiencing both.
Deep Bite in Adults vs. Growing Children
The same deep bite looks different depending on when it’s treated. In a growing child, a jaw-related deep bite can sometimes be improved by guiding how the jaws grow relative to each other, reducing how much correction is needed later. In an adult who’s finished growing, treatment relies more heavily on repositioning the teeth themselves — leveling the bite with braces or aligners, and in select cases combining orthodontics with restorative dental work to rebuild worn or short back teeth that have let the bite deepen over time.
Measuring a Deep Bite Precisely
Because “how deep is too deep” isn’t always obvious just by looking, our orthodontists at Davis & Goldberg Orthodontics use digital scans and X-rays to measure the exact amount of overlap and the specific jaw relationship contributing to it. This precision matters because a deep bite that’s primarily dental (tooth position) responds well to braces or aligners alone, while one with a significant skeletal component may need a different sequence of treatment, particularly if it’s caught while a child is still growing.
What Bite Ramps and Turbos Do
During active treatment for a deep bite, you may notice small raised bumps — called bite turbos or ramps — on the back of the upper front teeth or the surface of certain back teeth. These temporarily keep the back teeth slightly apart, which stops the front teeth from over-erupting while the back bite is being leveled out, and are removed once they’ve done their job. They can feel a little unusual at first, similar to any new dental surface, but most patients stop noticing them within a few days.
Frequently Asked Questions
Is a deep bite the same as an overbite?
A deep bite is essentially a more pronounced, excessive version of a normal overbite — the terms are often used somewhat interchangeably, but “deep bite” usually signals that the overlap is significant enough to need correction.
Can a deep bite get worse if left untreated?
Yes, particularly if missing teeth or ongoing wear are involved, a deep bite can gradually deepen further over time rather than staying the same.
How long does deep bite correction typically take?
It varies by severity and the patient’s age, generally ranging from about one to two years with braces or aligners, sometimes longer for more complex jaw-related cases.
Will correcting a deep bite change my facial appearance?
Many patients notice a subtly more balanced facial profile after treatment, since correcting how the jaws meet can affect lower facial proportions, though the degree of change varies by case.
Can a deep bite damage my teeth if I don’t treat it?
Over years, an uncorrected deep bite can contribute to gum irritation behind the upper front teeth and uneven wear concentrated on the front teeth, which is part of why correction is generally recommended even in milder cases.
Can a deep bite return after treatment?
It can, particularly if a retainer isn’t worn as directed afterward, since the bite relationship can gradually shift back without that ongoing support — consistent retainer wear is an important part of keeping a corrected deep bite stable.
Is a deep bite always noticeable just by looking?
Not always — mild to moderate cases can be subtle enough that only a dental or orthodontic exam reveals the true extent of the overlap, which is one reason regular checkups matter even without obvious symptoms.
Can missing back teeth cause or worsen a deep bite?
Yes — when back teeth are missing or significantly worn down, the bite can gradually collapse and deepen over time, which is why restoring those teeth is sometimes part of a complete deep bite treatment plan.
Is a deep bite more common in certain age groups?
It can appear at any age, but it’s often first identified in childhood as permanent teeth come in, and it’s worth flagging at an early evaluation since some deep bite cases respond well to timely, growth-focused treatment.
Disclaimer: The content on this blog is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of qualified health providers with questions you may have regarding medical conditions.