Deep Bite Correction: What It Is, Why It Matters, and How Orthodontists Fix It

A deep bite (also called a deep overbite) is one of the most common orthodontic problems that Dr Eugene Chan treats at Orthoworx Zetland and Orthoworx Chatswood. It occurs when your upper front teeth vertically overlap your lower front teeth more than they should, sometimes covering the lower teeth almost entirely. This guide explains everything you need to know about deep bite correction.

What Is a Deep Bite?

In a normal bite, the upper front teeth overlap the lower front teeth by approximately 2 to 3 millimetres – roughly 20 to 30% of the lower tooth height. A deep bite exists when this overlap exceeds 4 to 5 millimetres, or when the overbite is greater than 30 to 40% of the lower incisor height.

In severe cases, the lower front teeth may contact the palate (the roof of the mouth) rather than the upper teeth – this is called a traumatic deep bite and requires prompt treatment.

What Causes a Deep Bite?

Genetics: The shape of your jaw and the position your teeth grow into is largely inherited. Deep bites often run in families.
Skeletal factors: A short lower jaw, a particularly curved upper jaw, or overdevelopment of the upper front teeth can all contribute.
Thumb sucking or prolonged dummy use: In children, these habits can affect jaw development and tooth position over time.
Lost back teeth: When molars are missing, the bite can collapse downward, increasing vertical overlap at the front.
Muscle hyperactivity: Patients who grind or clench heavily can wear down their back teeth, worsening the deep bite.

Signs You May Have a Deep Bite

Your upper front teeth seem to cover most or all of your lower front teeth when biting
Jaw pain, clicking, or stiffness, particularly when eating
Wear on the back of your upper front teeth or the edges of your lower teeth
Gum irritation where the lower teeth contact the upper palate
A “gummy smile” appearance in some cases
Lower face appears shorter than normal proportionally

Why Should a Deep Bite Be Corrected?

A mild deep bite with no symptoms may not require urgent treatment. However, untreated moderate to severe deep bites commonly lead to:

Accelerated wear of the lower and upper front teeth, which can require expensive restorative dentistry later
TMJ (temporomandibular joint) dysfunction – jaw pain, clicking, headaches
Gum trauma where lower teeth bite into the palate
Difficulty achieving a stable outcome with any orthodontic treatment if the deep bite is not corrected concurrently

Orthodontic X-ray showing deep bite correction treatment planning at Orthoworx specialist clinic — Diagnostic X-rays and clinical bite assessment allow Dr Chan to measure the precise degree of overbite and plan the most effective correction approach.

How Is a Deep Bite Corrected?

Braces with Bite-Opening Mechanics

Traditional and ceramic braces can be configured to open the deep bite during treatment. Dr Chan may use:

Bite ramps or bite turbos: Small bonded pads on the upper front teeth that prevent the lower teeth from fully closing, allowing the back teeth to extrude over time
Reverse curve archwires: Specialised wire shapes that level the smile arc and intrude the front teeth
Class II elastics: Rubber bands that also help reposition the jaw relationship

Invisalign for Deep Bite

Invisalign has developed specific deep bite correction features including precision bite ramps built into aligner trays. It is effective for mild to moderate deep bite teeth treatment. More severe overbites may benefit from the additional control offered by fixed braces.

Surgical Orthodontics (Orthognathic Surgery)

In cases where the deep bite is primarily skeletal (caused by the size or position of the jaw bones rather than tooth position alone), a combination of orthodontic treatment and jaw surgery may be the most stable and definitive solution. Dr Chan works with maxillofacial surgeons for combined surgical-orthodontic cases.

Deep Bite Treatment for Adults vs Children

Patient Type	Treatment Options	Timing
Children (7–12)	Growth modification, functional appliances, myofunctional therapy	Ideal – jaw still growing
Teenagers (12–18)	Braces with bite-opening mechanics, Invisalign	Excellent outcomes
Adults (18+)	Braces or Invisalign; surgical option for severe skeletal cases	Effective at any age

Adults with deep bites should not feel that it is too late to treat. Dr Chan regularly corrects deep bites in adult patients in their 30s, 40s, and 50s through our adult orthodontics service. Whether you need traditional braces or Invisalign in Sydney, a personalised plan is tailored to your bite at your initial consultation. The treatment may take longer than in an adolescent patient, but the outcomes are comparable.

How Long Does Deep Bite Correction Take?

Mild deep bite with Invisalign: 12 to 18 months
Moderate deep bite with braces: 18 to 24 months
Severe or skeletal deep bite with combined treatment: 24 to 36 months

Frequently Asked Questions About Deep Bite Correction

What is a deep bite and how do I know if I have one?

A deep bite occurs when your upper front teeth overlap your lower front teeth more than 2–3 mm, often covering them almost entirely. Signs include jaw pain, worn front teeth, gum irritation on the palate, or lower teeth that seem to disappear when you close your mouth. An orthodontist measures your overbite precisely using X-rays and clinical assessment.

Can braces fix a deep bite?

Yes. Traditional metal braces, ceramic braces, and lingual braces are all highly effective at correcting deep bites, particularly when combined with bite-opening mechanics such as bite ramps or reverse curve wires. Braces give the orthodontist a high degree of control over the vertical dimension of the bite.

Can Invisalign fix a deep bite?

Yes, Invisalign can correct mild to moderate deep bites using precision bite ramps built into the aligners. For more severe or skeletal deep bites, fixed braces may provide greater control. Dr Chan will assess your bite at consultation and recommend the most appropriate approach for your specific case.

Is deep bite correction necessary if it does not hurt?

Not always immediately, but a deep bite often becomes progressively worse over time, particularly as back teeth wear down with age. Many patients who do not have symptoms now develop jaw pain, worn teeth, and TMJ issues in their 30s to 50s as a direct result of an untreated deep bite. An orthodontic assessment helps determine whether your deep bite needs active management.

How long does deep bite treatment take?

Treatment duration depends on severity. Mild deep bites with Invisalign typically take 12–18 months. Moderate deep bites with braces may take 18–24 months. Severe or skeletal cases involving surgery can take 24–36 months or more. Dr Chan provides a detailed timeline estimate at your initial consultation.

Is deep bite treatment suitable for adults?

Absolutely. Dr Chan regularly corrects deep bites in adult patients at Orthoworx. While jaw growth cannot be guided in adults as it can in children, orthodontic treatment (and in some cases surgery) achieves excellent and stable results at any age.

Does deep bite correction require surgery?

Only in severe skeletal deep bite cases where the jaw bones themselves are disproportionate. The majority of deep bite patients are treated successfully with braces or Invisalign alone, without any surgical component. Dr Chan will refer to a maxillofacial surgeon only when combined surgical-orthodontic treatment is the most appropriate and stable solution for your case.