Deep Bite: What It Is and How to Correct It

A deep bite often only becomes noticeable when symptoms appear: the front teeth wear down, the temporomandibular joint feels tense, or the smile looks “compressed.” Many people don’t realize for a long time that their bite isn’t functioning optimally — yet there are well-proven ways to open the bite for children, adolescents, and adults.

In this article, we explain what a deep bite is, how it develops, what effects and long-term consequences are possible, and what treatment options are available.

What Is a Deep Bite?

A deep bite occurs when the upper incisors excessively overlap the lower incisors during biting. A certain degree of overlap is normal — the guideline is approximately 2 to 3 millimeters, or about one-quarter to one-third of the lower crown. In a deep bite, however, the overlap is so pronounced that the lower teeth are barely visible or may even press against the palatal tissue.

A general distinction is made between:

• dental deep bite: primarily caused by the position of the teeth
• skeletal deep bite: influenced by jaw misalignment or the growth of the upper and lower jaw
• traumatic deep bite: when teeth or gums already show injuries or contact with the gingiva due to the bite

A particularly pronounced form of deep bite is the so-called cover bite, in which the upper incisors are additionally tipped backward – more on that shortly.

Cover bite: the variant with backward-tipped incisors

In a cover bite, the upper incisors overlap the lower ones particularly severely, and they are additionally steep or tipped backward. The lower front teeth almost completely disappear behind them when biting together, often touching the palatal mucosa. In the orthodontic classification, the cover bite belongs to Angle Class II/2: The lower jaw is positioned back, the bite is deep, and the upper central incisors are retroclined. Often, the lateral incisors tip forward and overlap the central incisors.

A cover bite is inherited in many cases and often becomes apparent as early as the mixed dentition. Typical features are strong masticatory muscles, a pronounced chin, and a small overjet – unlike the classic Class II overbite, in which the upper incisors protrude far in front of the lower ones.

Left untreated, a cover bite can wear down the front teeth, stress the gingiva behind the upper incisors, and restrict the lower jaw in its forward movement. This promotes chronic overloading of the muscles and temporomandibular joint – not in everyone, but often enough that the bite should be examined early.

Treatment follows a fixed sequence: First, the steeply positioned upper incisors are uprighted; only then can the bite be opened and the lower jaw brought into a better position. In children and adolescents, jaw growth can be guided with removable functional orthodontic appliances. In adults, fixed braces or aligners are options; uprighting severely tipped front teeth with aligners is demanding and usually requires attachments and careful planning. Because deep bite is one of the malocclusions prone to relapse, retention after treatment is especially important in cover bite cases.

Treatment example: cover bite corrected with aligners

How this sequence works in practice is shown by a case we treated at our practice and which Dr. Julia Steinmaier (née Funke) published with colleagues in the professional journal “Informationen aus Orthodontie und Kieferorthopädie.” The 13-year-old patient had a cover bite (Class II/2): steeply inclined upper incisors, 4 millimeters of vertical overlap with only 1 millimeter of overjet, plus a palatally displaced canine that was the primary reason for treatment.

Treatment was carried out with aligners. Small, precisely shaped pressure points in the trays (power ridges) first uprighted the upper incisors; elastics moved the upper posterior teeth backward and created space. For the bite opening, small ramps on the palatal side of the upper incisors (bite ramps) were planned in a second phase. The displaced canine had to be surgically exposed and aligned with a small fixed sectional arch. Active treatment with aligners lasted 75 weeks; with the surgical exposure and a ten-month pause for a stay abroad, three years passed from the initial consultation to completion. Since then, the patient wears a retainer tray at night on the upper arch and a bonded retainer on the lower.

The complete case presentation can be found at Aligner Therapy for Impacted Canines. At JUST KFO, we use bite ramps on the palatal side of the upper incisors, attachments, and elastics to open the bite with aligners; which of these you need will be shown by the digital planning after the scan.

Deep bite, cover bite, distal bite, dual bite – what is what?

• Deep bite: The upper incisors overlap the lower ones excessively. Says nothing about how the teeth are positioned or where the lower jaw is located.
• Cover bite: A deep bite in which the upper incisors are additionally tipped backward (Angle Class II/2).
• Distal bite (retrognathic bite): The lower jaw is positioned back relative to the upper jaw (Angle Class II). Usually, the upper incisors protrude far in front of the lower ones; the cover bite is a special form of this.
• Dual bite: The lower jaw can close in two positions – protruded, as one has grown accustomed to, or back, in its actual position. This complicates diagnosis because the true bite position only becomes visible when the muscles are relaxed.

How Does a Deep Bite Develop?

A deep bite rarely has just one single cause. Often, several factors come together.

Predisposition and Jaw Growth

In some people, jaw shape is genetically determined — for example, a rather “short” lower face or a particular growth pattern that favors a deep bite.

Misaligned Teeth and Bite Position

If the upper front teeth do not provide sufficient support for the lower teeth or are additionally tipped backward, the bite can “compress.” This increases the vertical overlap.

Early Tooth Loss or Wear

If molars are missing or heavily worn, the bite loses height. The front teeth then take on too much “work” — the deep bite can become more pronounced.

Habits and Muscle Activity

Heavy clenching (bruxism), certain swallowing patterns, or very active chewing muscles can put additional strain on the bite and promote misaligned teeth.

What consequences can an untreated deep bite have?

An untreated deep bite is not just a cosmetic issue. Depending on severity, it can place considerable strain on teeth, gums, muscles, and the jaw joint and lead to the following problems:

• Tooth wear: wear of the front teeth with flattened edges and cracks in the enamel
• Sensitive teeth or pain when chewing
• Injuries and gingival contact: pressure points on the palate or irritation of the gums with possible gum recession
• Tension in jaw, neck, and facial muscles
• Temporomandibular joint problems: symptoms up to TMD symptoms (popping, pain, limited opening)

Not everyone with a deep bite has immediate symptoms. However, wear and irritation to the palate tend to increase rather than decrease over the years. If symptoms are already present, a soon assessment is worthwhile, and for children, ideally while jaw growth can still help.

How is a deep bite diagnosed?

Diagnosis is made through a thorough orthodontic examination. What matters is not just “how it looks,” but how the teeth, temporomandibular joint, and muscles work together.

Depending on the situation, we use:

• clinical examination of the bite, dental arch, and gums
• analysis of jaw movement and joint function
• 3D scan and digital models
• radiographic imaging (if necessary)
• in cases with symptoms: functional diagnostic assessment (e.g., for suspected TMD)

This allows us to determine precisely which type of deep bite is present — and which treatment methods are appropriate.

How is a deep bite treated?

Treatment depends on the patient’s age, the severity, and the underlying cause. The goal is to stabilize the bite, relieve the upper front teeth, and restore healthy function.

Aligners (clear dental trays)

For many mild to moderate deep bites, treatment with aligners may be an option. The teeth are gradually guided into a more harmonious bite position.

Aligners may be appropriate when:

• the deep bite is primarily dental in origin
• sufficient space and stability are present in the posterior teeth
• good compliance with wearing the aligners is assured

Fixed Braces

For more pronounced misaligned teeth or more complex bite situations, fixed braces are often the more precise option. They allow targeted control not only of the front teeth, but also of the bite height and posterior support.

Bite opening and “building up” the bite

Depending on the findings, it may be necessary to “open” the bite in a controlled manner so that the upper front teeth no longer excessively overlap the lower ones. This can be achieved through orthodontic mechanics or special auxiliary elements.

Functional adjunctive therapy

If additional symptoms such as clenching, muscle tension, or TMD symptoms are present, adjunctive therapy may be beneficial, such as:

• occlusal splint (before or during orthodontic treatment)
• physical therapy to relieve muscle tension
• exercises/behavioral training for clenching habits

Important: Not every measure is appropriate for every situation. What matters is an individualized plan that integrates function and esthetics.

How long does treatment take?

The duration depends heavily on the starting situation. A mild deep bite caused purely by tooth position is corrected more quickly than a deep overbite with a retruded lower jaw; pronounced cases often require one to three years. This is followed by the retention phase, as a corrected bite tends to deepen again. Age and cooperation (e.g., with aligners) also play a role.

During the consultation, we can usually give a good estimate of a realistic timeframe.

What does treatment cost, and what does health insurance cover?

After the examination, you will receive a written cost estimate. For children and adolescents under 18, classification according to the orthodontic indication groups (KIG) determines whether statutory health insurance covers the treatment; a deep bite with contact to the palatal mucosa is classified differently than purely cosmetic overbite. From KIG 3 onwards: Statutory health insurance pays 80 percent of the costs directly; the 20 percent co-payment is reimbursed after successful completion of treatment. Treatment with aligners is always a private service.

Private health insurance and Beihilfe reimburse depending on the plan; we will assist you with the Beihilfe documentation. You can pay the co-payment interest-free directly through the practice in installments for up to 18 months. Whether you have statutory or private insurance: diagnostics, consultation, and care are the same for all our patients.

Deep Bite and Temporomandibular Joint Problems: Is There a Connection?

A deep bite can throw the chewing system out of balance—especially when the lower jaw is “forced” into an unfavorable position when biting together. This can place lasting strain on the musculature and temporomandibular joint and promote symptoms.

Not every deep bite automatically leads to temporomandibular joint problems—but if pain, popping, or restricted movement occurs, the connection should definitely be examined.

Treating Deep Bite in Cologne – JUST KFO

If you suspect that a deep bite is present – or if you notice symptoms such as tooth wear, tension, or temporomandibular joint problems – a professional assessment is worthwhile.

At JUST KFO in Cologne, we examine not only tooth alignment but also the function of the bite, musculature, and temporomandibular joint. Based on this, we create an individualized treatment plan—transparent, understandable, and tailored to your situation.

Feel free to schedule an appointment —we’ll take the time to answer your questions.

Frequently Asked Questions About Deep Bite