What is an Underbite?

What is an Underbite?

An underbite, medically referred to as prognathism, is a specific form of malocclusion (misalignment of the jaw) where the lower teeth overlap the upper teeth when the mouth is closed, often leading to a prominent chin and a more pronounced jawline. This condition is contrary to a normal bite, where the upper teeth slightly overlap the lower teeth, allowing for efficient chewing and a balanced appearance.

Underbites are quite prevalent and can occur due to a variety of factors, including genetics, jaw development, and childhood habits such as thumb sucking or prolonged use of a pacifier.

In a healthy, normal bite, the upper and lower jaws align cohesively, ensuring that the pressure during biting and chewing is distributed evenly across all teeth, reducing wear and tear. However, in the case of an underbite, this harmony is disrupted, creating an imbalance that can lead to significant dental problems and discomfort.

What Problems Can Underbites Cause?

If left untreated, underbite teeth can pose several functional challenges and health risks such as:

  • Chewing and Eating Difficulties: Individuals with an underbite often experience difficulty in the basic act of chewing and eating. The misalignment can cause imprecise biting and grinding, impacting the overall digestion process and restricting the intake of certain food items.
  • Speech Issues: The protrusion of the lower jaw can interfere with the articulation of words, leading to slurring, lisping, and other speech impediments, which can significantly affect communication and social interactions.
  • Oral Hygiene Problems: Underbites can create spaces that are hard to clean, fostering the accumulation of bacteria and plaque. This can lead to dental decay, gum disease, and bad breath, necessitating more stringent oral hygiene practices and frequent dental check-ups.
  • Aesthetic Concerns and Self-Esteem: The pronounced appearance of the lower jaw can impact facial symmetry and aesthetic appeal. This, in turn, can lead to decreased self-confidence and self-esteem, affecting social and professional life.
  • Potential for Jaw Pain and TMJ Disorders: The misalignment inherent in an underbite can cause chronic jaw pain and lead to temporomandibular joint (TMJ) disorders. This can result in discomfort while talking, eating, and even resting, impacting daily life significantly.
  • Wear on Teeth: Uneven pressure distribution during biting and chewing can cause excessive wear of teeth, leading to enamel loss, increased sensitivity, and potential tooth damage.

Understanding these implications is crucial in recognising the need for professional intervention and treatment.

What Problems Can an Underbite Cause
Who Can Be Affected by an Underbite

Who Can an Underbite Affect?

An underbite can affect individuals of all ages, from children to adults. It is crucial to address this orthodontic issue as early as possible to prevent complications and to ensure the most effective treatment. Early intervention can often result in simpler and less invasive solutions.

Children and Adolescents

Early identification and intervention in younger patients can harness the growth potential to guide jaw development and correct underbites. This phase may involve growth modification appliances and partial braces, paving the way for normal facial development and bite relationship.


Adults with underbites can also benefit greatly from orthodontic treatment. While the approach might differ due to the cessation of growth, a combination of braces, aligners, and sometimes surgical options can effectively correct underbites and restore function and aesthetics.

Correcting an Underbite

Correcting underbite teeth involves a personalised, thoughtful approach from experienced orthodontists like Dr. Nino Gullotta. Here at Gullotta Orthodontics, we utilise a range of innovative and specialised treatment solutions to address the unique case of every patient. Check out our results gallery to see for yourself!

Underbite Treatment Options

  • Braces: Braces are a tried-and-tested method for correcting underbites, offering precise control over teeth movement and alignment.
    • Clear Braces: Clear braces provide the structural benefits of traditional braces but with transparent brackets, making them a more aesthetic option for patients concerned about appearance.
    • Lightforce Braces: Lightforce braces use 3D-printed, patient-specific brackets for a more customised and comfortable, and often quicker, treatment experience.
    • Metal Braces: Damon metal braces use self-ligating (doors) technology to reduce friction and optimise tooth movement, often resulting in faster treatment times.
  • Clear Aligners: Clear aligners are virtually invisible trays that gently shift the teeth into their desired position, ideal for those looking for a discreet solution.
    • Invisalign: Invisalign offers a series of clear, removable aligners, customised to gradually align the teeth. Dr. Gullotta has extensive experience in creating beautiful smiles with Invisalign.
    • Spark Aligners: Spark aligners are the latest in clear aligner technology, providing a clear, less visible option to align the teeth effectively.

Compassionate, Customised Care

Our team is dedicated to creating genuine, confident smiles in a friendly and compassionate environment. We focus on building authentic relationships with our patients, ensuring a personal, and not just clinical, experience.

Through detailed consultations, we understand each patient’s unique anatomy and preferences, enabling us to develop well-rounded and efficient treatment plans. Our commitment to innovation and personalised care makes Gullotta Orthodontics a leading choice for orthodontic solutions on the Gold Coast. If you have an underbite or any other orthodontic concerns, reach out for a consultation and explore the range of treatment options available.