While “overbite” and “underbite” are often used interchangeably, they describe two very different bite conditions. An overbite occurs when the upper teeth extend too far over the lower teeth, while an underbite is the opposite. Understanding how each affects your bite is the first step in finding the most effective orthodontic solution.
What Is an Overbite?
An overbite occurs when the upper front teeth overlap the lower front teeth more than normal. This vertical overlap is one of the most common bite concerns seen in both children and adults.
Overbites can develop due to genetics, an imbalance in jaw growth, or tooth loss. In mild cases, the overlap may only affect appearance, but in more severe cases, it can lead to jaw discomfort, difficulty chewing, or uneven wear on the lower teeth.
If left untreated, an overbite can cause long-term issues such as enamel erosion, speech difficulties, and an increased risk of damage to the lower front teeth.
Learn more on our Overbite page.
What Is an Underbite?
An underbite is when the lower teeth sit in front of the upper teeth, creating a reversed bite. This condition occurs when the lower jaw grows more than the upper jaw, or when the upper jaw doesn’t develop enough. It can also be influenced by genetics or early childhood habits.
People with an underbite may notice difficulty biting or chewing, speech issues, or a sense of imbalance in their facial appearance. In more severe cases, an underbite can cause uneven tooth wear, jaw discomfort, and strain on the temporomandibular joint (TMJ).
If left untreated, an underbite can worsen over time and lead to functional and aesthetic concerns.
Learn more on our Underbite page.
| Attribute | Overbite | Underbite |
| Type of misaligment | Upper teeth overlap lower teeth (vertically) | Lower teeth extend past upper teeth |
| Appearance | Lower teeth less visible | Lower jaw more prominent |
| Common causes | Jaw growth imbalance, tooth loss | Jaw size discrepancy, genetics |
| Functional impact | Tooth wear, jaw tension | Difficulty chewing, speech problems |
| Treatment options | Braces, aligners, | Braces, aligners, surgery for severe cases |
Can You Have Both an Overbite and an Underbite?
It’s not possible to have both an overbite and an underbite at the same time, as they are opposite types of bite alignment. However, in some cases, a crossbite may appear similar to elements of both. A crossbite occurs when some upper teeth sit inside the lower teeth, creating a mix of bite patterns that can affect one side of the mouth or a single tooth.
To determine the exact type of bite issue, an orthodontist will carry out a detailed examination that may include digital scans, X-rays, or photographs. These images help assess jaw alignment, tooth position, and overall bite function, allowing for a precise diagnosis and personalised treatment plan.
Why It’s Important to Treat Bite Problems Early
Early orthodontic treatment can make a big difference in how easily and effectively bite issues are corrected.
When an overbite or underbite is addressed in childhood, while the jaws are still developing, it’s often possible to guide growth and reduce the need for more complex treatment later in life.
If left untreated, bite problems can lead to:
- Uneven tooth wear
- Jaw discomfort or tension
- Speech difficulties
- Strain on the jaw joints (TMJ)
- Changes to facial balance and confidence
By treating bite problems early, patients can enjoy improved function and comfort, setting the foundation for a healthy, well-aligned smile that lasts a lifetime.
How Orthodontics Can Fix Overbite and Underbite
Both overbite and underbite can be corrected with modern orthodontic treatments, depending on your age and the severity of your bite.
LightForce Braces
These 3D-printed braces are fully customised for each tooth, offering precise and efficient correction for complex bite issues.
Braces
Braces are effective for treating both overbite and underbite. Damon metal braces use self-ligating brackets to speed up treatment, while clear ceramic braces provide a discreet alternative.
Clear Aligners (Invisalign & Spark)
Invisalign and Spark Aligners are ideal for mild to moderate bite problems. They’re removable, comfortable, and nearly invisible.
Jaw Surgery & Early Appliances
Severe underbites caused by jaw discrepancies may require corrective jaw surgery, while children may benefit from early appliances that guide jaw growth and prevent worsening alignment.
At Gullotta Orthodontics, every treatment plan is tailored to your needs, helping you achieve a healthy, balanced smile with lasting results.
Unsure Which One You Have? Gullotta Orthodontics Can Help.
If you’re not sure whether your bite is an overbite, underbite, or another type of alignment issue, our team is here to help.
During your consultation, we’ll assess your bite, explain what’s happening, and recommend a personalised treatment plan to achieve a healthy, confident smile.
Book a consultation at our Gold Coast clinic today.
