Understanding Overbites, Underbites, and Crossbites: Which Do You Have?

Your teeth may look fine at first glance, but the way your upper and lower jaws fit together tells a deeper story about your oral health. Bite misalignments known as malocclusions are incredibly common, and many people live with one without realizing it. Whether you’ve noticed your front teeth overlapping too much, your lower jaw jutting forward, or your teeth shifting side to side, these are signs worth paying attention to.

At Clemente Orthodontics, a multigenerational family practice proudly serving Bergen and Rockland County communities since the 1970s, Dr. Michael Clemente and his daughters, Dr. Nicole and Dr. Marissa, help patients of all ages identify and treat these bite issues. If you’ve been wondering whether your bite is off, understanding the differences between these three common bite problems is a great place to start. Learning more about orthodontic services can also help you figure out which path forward makes the most sense for your smile.

What Is an Overbite?

An overbite occurs when the upper front teeth overlap too far over the lower front teeth. Some vertical overlap is completely normal, as a small amount of coverage is actually healthy, but when the overlap becomes excessive, it crosses into what orthodontists classify as a deep bite.  A deep overbite is defined as a vertical overlap greater than 4mm and, when left unaddressed, can lead to functional and aesthetic consequences over time.

Left untreated, a significant overbite can accelerate wear on the lower front teeth, cause jaw discomfort, and in some cases affect your facial appearance. Some overbites develop because of genetics, while others can be connected to childhood habits like prolonged thumb-sucking or pacifier use.

How Overbites Are Treated

Both braces and Invisalign are effective options for correcting overbites, depending on the severity of your condition. In some cases, especially for children and teens, early intervention can guide jaw development in the right direction before the problem deepens.

What Is an Underbite?

An underbite is the opposite of an overbite. It happens when the lower jaw extends beyond the upper jaw, causing the lower front teeth to sit in front of the upper teeth. Underbites are often more visible than overbites and can significantly affect a person’s facial profile, speech, and ability to chew comfortably.

This type of malocclusion is frequently rooted in jaw structure rather than tooth position alone, which means treatment sometimes needs to address both dental alignment and skeletal development. For children, early orthodontic treatment during the growth years can make a meaningful difference. Our team emphasizes early orthodontics as one of the best windows of opportunity for intercepting problems like underbites before they require more complex correction later on.

Signs You May Have an Underbite

It’s not always obvious from looking in the mirror whether you have an underbite. Common signs include: 

• Lower teeth that sit noticeably in front of the upper teeth
• Difficulty biting through food
• Jaw or facial discomfort

An orthodontic evaluation is the most reliable way to confirm a diagnosis and understand severity.

What Is a Crossbite?

A crossbite is a bit different from the previous two because it involves a lateral misalignment. Rather than the upper and lower teeth not lining up front to back, a crossbite causes some of the upper teeth to sit inside the lower teeth instead of outside them. This can affect the front teeth (anterior crossbite) or the back teeth (posterior crossbite), and it can occur on one side of the mouth or both.

Crossbites can put uneven pressure on teeth, leading to wear, asymmetrical jaw growth, and in some cases, jaw shifting over time. Early correction is especially important here, as the jaw can adapt to the misalignment in ways that become harder to reverse with age. Treatment options range from palate expanders to clear braces and Invisalign, depending on the type and extent of the crossbite.

Which Bite Issue Do You Have?

The only way to know for certain which bite issue you’re dealing with, or whether you have one at all, is through a thorough orthodontic examination. Bite problems don’t always come with obvious symptoms, and when they do, the signs can overlap. You might experience jaw clicking or soreness, uneven tooth wear, difficulty chewing, or speech irregularities that seem unrelated to your teeth.

The good news is that all three of these bite types are very treatable, often with Invisalign or traditional braces, and the results go far beyond straightening teeth. Correcting your bite can improve jaw function, protect your teeth from long-term wear, and boost your confidence in your smile.

Frequently Asked Questions About Overbite, Underbite, and Crossbite

Can you have both a crossbite and an overbite at the same time?

Yes, it is possible, and fairly common, to have multiple bite issues simultaneously. Many patients present with a combination such as a crossbite plus an overbite, or an underbite with a crossbite on one side. These combinations happen because crossbites involve side-to-side (lateral) alignment while overbites and underbites involve front-to-back positioning, so they can coexist independently. A comprehensive orthodontic evaluation at Clemente Orthodontics can identify exactly which combination of bite issues you have and map out a treatment plan that addresses all of them.

What’s the difference between a crossbite and an underbite?

A crossbite happens when some upper teeth sit inside the lower teeth instead of outside them, and it can affect front teeth, back teeth, or just one side of the mouth. An underbite is a front-to-back alignment issue where the entire lower jaw extends forward beyond the upper jaw, causing lower front teeth to sit in front of upper front teeth. Crossbites can involve just a few teeth, while underbites are typically a whole-jaw positioning issue. It is possible to have both at once.

How do I know if my overbite is severe enough to need treatment?

A small amount of vertical overlap between upper and lower front teeth is healthy and normal. Orthodontists typically classify an overbite as a deep bite when the vertical overlap exceeds 4mm. Signs your overbite may need treatment include lower front teeth touching the roof of your mouth, accelerated wear on the lower front teeth, jaw discomfort, or visible changes to your facial profile. An orthodontic evaluation at Clemente Orthodontics is the most reliable way to confirm severity and discuss whether braces or Invisalign® would help.

What age is best to treat an underbite or crossbite?

Early intervention is especially valuable for underbites and crossbites because these conditions often involve jaw development, not just tooth position. Treating between ages 7 and 10, while the jaw is still growing, allows orthodontists to use appliances like palate expanders and proprietary Growth Modification Appliances to guide healthy jaw development before problems become harder to correct. That said, adults can absolutely still treat these conditions with braces, Invisalign®, or in some cases combined orthodontic and surgical approaches. Our multigenerational family practice at Clemente Orthodontics treats patients of all ages.

Can Invisalign® fix an overbite, underbite, or crossbite?

Yes, Invisalign® can correct many cases of overbite, underbite, and crossbite, particularly mild to moderate cases. As the number one Invisalign® provider in New York and New Jersey and a top 1% Sapphire provider, our team at Clemente Orthodontics routinely treats all three bite conditions with Invisalign®. More severe cases, especially those involving significant jaw skeletal differences, may need traditional braces or a combination of orthodontics and oral surgery. We can determine the best approach during a complimentary consultation.

Schedule a Complimentary Consultation at Clemente Orthodontics

If any of this sounds familiar, you don’t have to keep guessing. As the number one Invisalign provider in New York and New Jersey and a top 1% Sapphire Invisalign Provider nationwide, our team at Clemente Orthodontics has the expertise to diagnose your bite and walk you through your options in plain, simple terms. We treat patients of all ages, from young children to adults, and we love helping people understand what’s really going on with their smiles.

We invite you to take the first step and schedule your complimentary consultation today. Whether you suspect an overbite, underbite, or crossbite, or you just want peace of mind, we’re here to help you find the answers and build a treatment plan that fits your life.