If your lower teeth jut out past your upper teeth when you close your mouth, you may have an underbite — a dental condition that affects not only your smile but also your overall oral health and quality of life. Whether it’s mild or severe, an underbite can cause difficulty chewing, speaking challenges, jaw pain, and even self-confidence issues. The good news? Modern dentistry and orthodontics offer a range of effective solutions. In this comprehensive guide, we’ll break down exactly what causes an underbite, explore the best treatment options available, and help you understand how to fix it for good.

Schedule your expert consultation at Brookfield Dental Associates Clinic in Springfield, VA today! Call (703) 913-1377 to book your appointment now!

What Is an Underbite?

An underbite, clinically referred to as Class III malocclusion, occurs when the lower jaw (mandible) protrudes further forward than the upper jaw (maxilla). This misalignment causes the lower front teeth to overlap or sit in front of the upper front teeth when the mouth is closed. Unlike a normal bite — where the upper teeth slightly overlap the lower — an underbite reverses this natural relationship.

Underbites can range from barely noticeable to quite pronounced. Even a minor underbite can put undue stress on the jaw joints and teeth, making early detection and treatment important.

Common Causes of an Underbite

Understanding what causes an underbite is the first step toward finding the right treatment. Several factors can contribute to this dental condition:

1. Genetics

Heredity is one of the most significant contributors to underbites. If one or both of your parents had jaw misalignment issues, there’s a higher likelihood you may develop one too. Jaw structure and size are largely genetically determined, meaning some people are simply born with a lower jaw that grows more prominently than the upper.

2. Childhood Habits

Certain habits during early childhood can influence jaw development and lead to bite problems. These include:

• Prolonged thumb sucking or pacifier use beyond age 3
• Tongue thrusting (pushing the tongue against the teeth)
• Bottle feeding for extended periods
• Mouth breathing due to allergies or chronic congestion

3. Jaw or Facial Injury

Trauma to the face or jaw can disrupt normal bone development or shift the jaw out of alignment, resulting in an underbite. Injuries during childhood, when the jaw is still growing, can be especially impactful.

4. Tumors or Cysts

In rare cases, tumors or cysts in the mouth or jaw can cause the jawbone to shift, leading to an underbite. These cases require immediate medical attention alongside orthodontic care.

5. Skeletal vs. Dental Underbites

It’s worth noting that underbites can be either skeletal (caused by jaw bone position) or dental (caused by the position of the teeth). Dental underbites may be easier to treat with orthodontics alone, while skeletal underbites often require more comprehensive intervention.

Why Treating an Underbite Matters

Many people wonder if treating an underbite is really necessary. The answer is often yes — and here’s why:

• Chewing difficulties: Misaligned teeth make it harder to properly chew food, which can affect digestion and nutrition.
• Speech problems: An underbite can contribute to lisps and other speech impediments.
• Jaw pain and TMJ disorders: Extra stress on the jaw joints can lead to temporomandibular joint (TMJ) disorder, causing chronic pain, headaches, and clicking sounds.
• Tooth wear: Misaligned teeth wear down unevenly, increasing the risk of chipping, cracking, and decay.
• Sleep apnea: In some cases, jaw misalignment can contribute to breathing problems during sleep.
• Self-esteem: Visible underbites can affect how a person feels about their appearance and smile.

How to Fix an Underbite: Treatment Options

The right treatment for an underbite depends on the patient’s age, the severity of the condition, and whether the underbite is primarily dental or skeletal in nature. Here are the most common and effective options:

1. Braces (Traditional or Clear Aligners)

For mild to moderate dental underbites, orthodontic braces or clear aligners like Invisalign can effectively shift the teeth into proper alignment. This is especially effective in children and teenagers whose jaws are still developing. Treatment typically lasts 18 months to 3 years.

2. Palate Expanders

Often used in children, a palate expander widens the upper jaw to allow the upper and lower teeth to meet properly. This appliance is placed on the roof of the mouth and gradually expanded over time. When used early, it can correct underbites without the need for more invasive procedures.

3. Reverse-Pull Face Mask (Facemask Therapy)

This orthodontic device hooks onto the upper back teeth and uses metal bands attached to a mask worn over the face to pull the upper jaw forward. It’s most effective in children between ages 8 and 12 and can dramatically improve skeletal underbites during this growth window.

4. Chin Cap

A chin cap applies pressure to the lower jaw to slow or redirect its growth. Like the face mask, it’s most effective during childhood and adolescence when the bones are still growing and responsive to guidance.

5. Tooth Extraction

In some cases, overcrowding contributes to an underbite. Removing one or more teeth from the lower jaw can relieve crowding and make it easier to align the remaining teeth properly with braces or aligners.

6. Orthognathic (Jaw) Surgery

For adults with severe skeletal underbites, orthognathic surgery may be the most effective — and sometimes only — solution. The procedure repositions the upper jaw, lower jaw, or both to achieve proper alignment. While it is a significant surgical undertaking, it produces permanent and dramatic results. It’s typically combined with pre- and post-surgical orthodontic treatment.

7. Dental Bonding and Veneers

In very mild cases where the underbite is primarily cosmetic, dental bonding can be used to reshape individual teeth and improve how the bite appears. Composite resin is applied to the surface of the teeth to build them up or change their shape. While this does not correct the underlying jaw position, it can be a viable option for patients with minor misalignment who are not candidates for orthodontics or surgery.

What Age Is Best for Underbite Treatment?

Early intervention is key. Dentists and orthodontists typically recommend beginning evaluation by age 7. Treating an underbite during childhood or adolescence, when the jaw is still developing, is far more straightforward and often less invasive than treating one in adulthood. However, adults can still achieve excellent results with the right combination of orthodontics and, if necessary, surgery.

Maintaining Oral Health With an Underbite

Whether you’re currently in treatment or awaiting it, maintaining good oral hygiene is critical. Misaligned teeth can create hard-to-reach spaces that harbor plaque and bacteria, increasing the risk of cavities and gum disease. Here are some oral care tips:

• Brush thoroughly at least twice a day using a soft-bristled toothbrush.
• Floss daily to remove plaque and food debris from between teeth and along the gumline.
• Use an antiseptic mouthwash to reduce bacteria and freshen breath.
• Attend regular dental check-ups every six months for professional cleanings and monitoring.
• If wearing braces, use floss threaders or water flossers to clean around brackets and wires effectively.

FAQ

Can an underbite fix itself?

In most cases, an underbite will not correct itself without treatment. While very mild cases in young children may improve slightly as the jaw develops, the majority of underbites require some form of orthodontic or dental intervention to achieve proper alignment.

Is an underbite painful?

An underbite itself may not always be painful, but it can lead to jaw pain, headaches, and TMJ discomfort over time due to the uneven stress placed on the joints and muscles. Severe underbites are more likely to cause noticeable discomfort.

How long does underbite treatment take?

Treatment duration varies depending on the method and severity. Braces may take 1 to 3 years, while surgical correction involves additional time for preparation and recovery. Your dentist or orthodontist can give you a personalized timeline after evaluation.

Can adults get treatment for an underbite?

Absolutely. While early treatment is ideal, adults can still successfully address an underbite. Options such as braces, clear aligners, and jaw surgery are all available to adult patients and can produce excellent, long-lasting results.

Is underbite surgery covered by insurance?

Coverage varies by insurance plan. When an underbite causes functional problems such as chewing difficulties, speech issues, or TMJ pain, surgical treatment may be partially covered under medical insurance. It’s best to consult with your provider and dental team to understand your specific coverage.

How do I know if I have an underbite?

A dentist or orthodontist can diagnose an underbite during a routine exam. Signs you may have one include your lower teeth visibly protruding past your upper teeth, difficulty biting or chewing, and jaw discomfort. If you’re concerned, scheduling a dental evaluation is the best first step.

Schedule your expert consultation at Brookfield Dental Associates Clinic in Springfield, VA today! Call (703) 913-1377 to book your appointment now!