What Is an Open Bite?
An open bite is a type of malocclusion (misaligned bite) where the upper and lower teeth do not meet when the mouth is closed, leaving a visible gap between the two arches.
This gap most commonly occurs between the front teeth (known as an anterior open bite) but it can also affect the back teeth (posterior open bite). In a healthy bite, the upper and lower teeth come together evenly, allowing for efficient chewing, clear speech and balanced jaw function.
With an open bite, this contact is disrupted. This can affect how food is bitten and chewed, how certain sounds are formed and how pressure is distributed across the teeth and jaw. Open bites can develop gradually over time and may be influenced by a combination of habits, growth patterns and tooth positioning.
What Causes an Open Bite?
An open bite can develop due to several factors. Understanding the cause helps guide the most appropriate treatment approach.
Childhood Habits:
Certain habits during early development can influence how teeth and jaws form. Prolonged thumb sucking, extended use of a dummy or pacifier and tongue thrusting can all place pressure on the front teeth, preventing them from erupting into proper alignment.
Jaw Growth Patterns/Genetics:
In some cases, an open bite is related to how the upper and lower jaws grow. Vertical growth patterns or skeletal differences can create a gap between the teeth, even when the teeth themselves are positioned correctly.
Tooth Alignment Issues:
Improper tooth eruption, spacing, or positioning can contribute to an open bite. When teeth do not align as they come through, it can affect how the upper and lower arches meet.
Airway and Breathing Factors:
Chronic mouth breathing, often linked to allergies or airway obstruction, can influence jaw development and tongue posture. Over time, this can contribute to the formation of an open bite.
How Can an Open Bite Affect Your Teeth?
If left untreated, an open bite can lead to a range of functional and aesthetic concerns.
Difficulty Biting and Chewing
An open bite can make it difficult to bite into foods using the front teeth, often requiring compensation with the back teeth. This can affect eating habits and overall comfort.
Speech Difficulties
The gap between the teeth can interfere with the pronunciation of certain sounds, particularly “s” and “th,” leading to a lisp or unclear speech.
Excessive Wear on Back Teeth
Because the back teeth take on more pressure during chewing, they may experience increased wear over time.
Jaw Strain and Discomfort
An imbalanced bite can place additional stress on the jaw joints, potentially contributing to discomfort or tension.
Oral Hygiene Challenges
Misalignment can make certain areas harder to clean, increasing the risk of plaque build-up and gum issues.
Aesthetic Concerns and Confidence
The visible gap between the teeth can affect smile appearance, which may impact confidence in social or professional settings.
How Is an Open Bite Treated?
Treatment depends on the cause of the open bite, your age and how your teeth and jaws have developed. The first step is understanding why the teeth aren’t meeting properly, as this helps determine the most appropriate treatment approach.
For many patients, braces can be used to gradually move the teeth into better alignment and improve the way the bite comes together. In younger children, early orthodontic treatment may be recommended to guide jaw development or address habits that have contributed to the open bite. In more complex cases, treatment planning may involve working alongside your general dentist or other dental specialists to achieve the best long-term result.
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Frequently Asked Questions
Can braces fix an open bite?
In many cases, yes. Braces can be used to improve the position of the teeth and the way your bite comes together. The most appropriate treatment depends on the cause and severity of the open bite.
Is an open bite something my child will grow out of?
Not always. While some bite changes occur naturally as children grow, an open bite may persist without treatment, particularly if it’s related to jaw development or ongoing habits. An orthodontic assessment can determine whether monitoring or treatment is appropriate.
Does an open bite always need treatment?
Not necessarily. Treatment depends on what’s causing the open bite, how severe it is and whether it’s affecting your bite or everyday function. Some cases are monitored, while others benefit from orthodontic treatment.
Can thumb sucking cause an open bite?
Yes. Prolonged thumb sucking, dummy use or tongue thrusting during childhood can contribute to the development of an open bite. If these habits continue as the adult teeth come through, they may affect how the teeth and jaws develop.
At what age should an open bite be assessed?
If you’re concerned about the way your child’s teeth meet, it’s worth arranging an orthodontic assessment. Early assessment doesn’t always mean treatment is needed immediately, but it can help identify whether the bite is developing as expected.
What happens if an open bite is left untreated?
Depending on its severity, an open bite may make it more difficult to bite certain foods, affect speech or influence the way your teeth wear over time. Dr Nino can assess whether treatment is recommended based on your individual situation.
