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The words “overbite” and “overjet” certainly sound similar. Both conditions concern your front teeth. Both conditions fall under the same category of bite problems—Class II malocclusions, if you want to be technical. So it’s not surprising that they’re often used interchangeably. But while there are similarities, overbite and overjet are also distinctly different.

• Overbite/Overjet Geometry

In a healthy bite, the front top teeth project slightly beyond, and slightly overlap, the bottom teeth. The key word here is “slightly.” With a Class II malocclusion, the upper front teeth project further beyond the lower teeth than they should.

Of course, teeth and bites are as individual as we are, so there are variations in just how and just how much the overlap occurs. In diagnosing an overbite vs. an overjet, the difference comes down to a matter of vertical vs. horizontal.

An overbite, or deep bite, occurs when the top teeth vertically overlap the bottom teeth more than they should for a healthy bite. Generally, when a person’s top teeth cover more than a quarter of the bottom teeth when biting down, or more than two to three millimeters, that person is said to have an overbite.

An overjet, commonly known as protruding or buck teeth, is the result of a horizontal overlap that is broader than normal. This causes the top teeth to project outward toward the lips more than they do in a typical bite. An overjet is usually diagnosed when the horizontal distance between the top and bottom teeth exceeds two to three millimeters.

• Overbite/Overjet Causes

The causes for both an overbite and an overjet might be dental (caused by tooth alignment), or skeletal (caused by bone development), or a combination of both. These bite problems can run in families. They are also affected by the size and position of the jaws and the shape and position of the teeth.

Early oral habits, such as prolonged and vigorous thumb-sucking or pacifier use, can also contribute to the development of a Class II malocclusion, particularly an overjet. Consistent pressure from thump or pacifier pushes the teeth outward as they erupt, which encourages them to protrude. These oral habits can affect the shape of the palate and jaw, too.

• Overbite/Overjet Treatments

There are many types of treatment available to correct teeth and bite misalignments. Dr. Kathleen Chan and Dr. Ivy Chen will tailor your treatment to your specific malocclusion for the best orthodontic outcome.

If you have a mild malocclusion, and minor dental issues are the main cause of that malocclusion, either braces or clear aligners can be effective for an overjet or an overbite. Elastics (rubber bands) are often used as part of this treatment.

If the malocclusion is due to bite problems caused by uneven upper and lower jaw development, devices called functional appliances can be used with braces to help guide the growth of the jawbones while young patients’ bones are still forming. These include appliances that work inside the mouth to help the upper and lower jaws grow proportionally, and external appliances such as headgear.

In some cases, where the malocclusion is skeletal in nature as well as dental, surgical treatment might be necessary to reshape the jawbone itself. Orthodontic treatment is usually needed as well both before and after surgery.

• Overbite/Overjet Consequences

Over time, a deep overbite can cause damaged gum tissue, worn enamel, and fractured teeth. When teeth protrude because of an overjet, they can lead to self-consciousness and are more at risk for injury. Both malocclusions share dental and medical consequences, including concerns about facial and jaw appearance, problems speaking or chewing, headaches, and face and jaw pain.

Class II malocclusions aren’t all the same, and orthodontic patients aren’t all the same either. You may have a minor malocclusion or a significant one. You may have an overbite, or an overjet, or a combination of different bite and alignment concerns. Your malocclusion may not bother you at all, or it may cause pain, discomfort, or self-consciousness.

That’s why every overbite or overjet should be evaluated by an orthodontist. When you visit our Andover orthodontic office, Dr. Kathleen Chan and Dr. Ivy Chen will be able to diagnose the exact nature of your malocclusion, the reason for it, and your best individualized treatment plan. An overbite and an overjet are different malocclusions, but you and your orthodontist want the same outcome for each: a healthy, attractive, and confident smile!

Orthodontic braces are used to straighten the teeth, which not only creates a more pleasing appearance, but also helps prevent tooth decay and other oral health problems. Braces are only effective when they are properly cared for, however. Certain foods, for example, are better suited for individuals who have braces, as opposed to hard and sticky foods that can cause damage. So, what types of foods should you or your kids eat to protect dental appliances?

The best foods to eat with braces are those that are not high in sugar and do not require excessive chewing. For breakfast, try eggs, yogurt, bacon, wheat toast, or oatmeal. Lunch may steer toward a banana rather than an apple, a salad without nuts, and a glass of water. If you are looking for some after-school snacks for your kids, consider baked tortilla chips with salsa and guacamole, or try string cheese with fruit.

A healthy dinner can include most types of vegetables, so long as they are cooked to an appropriate softness. Pair that with a lean protein, such as fish or chicken, and follow up with dessert. Just be sure to brush afterward!

Post-Tightening Foods

As braces begin to adjust the alignment of the teeth, our team at Chan & Chen Orthodontics will periodically tighten them to continue the alignment process. After tightening occurs, the teeth may be sore and sensitive to certain foods. During this time, it is best to eat soft foods. Examples include:

• Pudding
• Mashed potatoes
• Soup
• Ice cream
• Cottage cheese
• Peas
• Pancakes
• Pasta

Foods to Avoid

Anyone who wears braces – whether fixed or removable – should avoid excessive snacking and should aim to eat a healthy and balanced diet. It is also important to avoid foods that could cause damage to the braces, such as:

• Hard candies
• Gum
• Nuts
• Popcorn
• Certain raw vegetables (for example, carrots)

Considerations

Regardless of what types of foods you eat with braces, it is important to keep the crevices between the teeth and around the braces very clean. That means brushing and flossing after meals to prevent the build-up of plaque and decay. Not only can failing to do so damage the teeth, but it can also cause discoloration.

Have more questions about orthodontic treatment? The Chan & Chen Orthodontics staff is always ready to answer all of your questions and help you get the most out of the treatment plan prescribed for you by Dr. Kathleen Chan and Dr. Ivy Chen!

Also known as onchophagia, the habit of nail biting is one of the so-called “nervous habits” that can be triggered by stress, excitement, or boredom. Approximately half of all kids between the ages of ten and 18 have been nail biters at one time or another. Experts say that about 30 percent of children and 15 percent of adults are nail biters, however most people stop chewing their nails by the time they turn 30.

Here are four dental and general reasons to stop biting your nails:

1. It’s unsanitary: Your nails harbor bacteria and germs, and are almost twice as dirty as fingers. What’s more, swallowing dirty nails can lead to stomach problems.

2. It wears down your teeth: Gnawing your nails can put added stress on your pearly whites, which can lead to crooked teeth.

3. It can delay your orthodontic treatment: For those of our patients wearing braces, nail biting puts additional pressure on teeth and weakens roots.

4. It can cost you, literally: It has been estimated that up to $4,000 in extra dental bills can build up over a lifetime.

Dr. Kathleen Chan and Dr. Ivy Chen and our team recommend the following to kick your nail biting habit:

• Keep your nails trimmed short; you’ll have less of a nail to bite.
• Coat your nails with a bitter-tasting nail polish.
• Ask us about obtaining a mouthguard, which can help prevent nail biting.
• Put a rubber band around your wrist and snap it whenever you get the urge to gnaw on your nails.
• Think about when and why you chew your nails. Whether you are nervous or just bored, understanding the triggers can help you find a solution and stop the habit.
• If you can’t stop, behavioral therapy may be an effective option to stop nail biting. Ask Dr. Kathleen Chan and Dr. Ivy Chen and our team for a recommendation.

Orthodontic treatment involves a lot more than just straightening your teeth. For a healthy smile, your bite must be healthy as well! This means that the upper and lower jaws need to fit together properly and comfortably.

If your bite is out of alignment because of jaw misalignment, orthodontic treatment can help correct the shape and position of your jaws with devices called functional appliances. These appliances are most often used for young patients whose bones are still growing, and are designed to treat malocclusions, or bite problems.

Common malocclusions such as overbites and overjets can occur when the upper teeth protrude further than they should, or the lower jaw is positioned too far back, or both. The Twin Block appliance can be used in such cases to help move your lower jaw and teeth into alignment with your upper jaw.

Why “Twin”? Because the Twin Block appliance is two separate pieces, each made of wire and smooth acrylic. Both pieces are crafted to fit precisely over your upper and lower arches and can be adjusted as your treatment progresses. The top plate can also be adjusted, if necessary, to widen the upper palate.

Why “Block”? Acrylic blocks cover the biting surfaces of several of your upper and lower teeth. These blocks fit together like a 3D puzzle. When you bite down, the upper blocks interlock with the lower blocks, pushing the lower blocks forward just a bit before you can bite down completely. Over time, bit by bit (and bite by bite), the Twin Block appliance advances your lower jaw and teeth to create a balanced, comfortable bite.

For the quickest and best results, you should wear your Twin Block appliance as directed. It’s made to be worn comfortably while you sleep, eat, and otherwise go about your day. (It’s a good idea to check with our Andover orthodontic team to see about removing it when you’re active, especially for swimming and contact sports.) When it’s time to brush, the Twin Block appliance is removable. This means that you can clean your teeth and your appliance easily.

And, while it’s made to work hard for you, it’s not indestructible. Don’t expose your appliance to heat or hot water, as the plastic may warp. Use the cleaning methods we recommend. Finally, when your appliance is out of your mouth, keep it in its case! You don’t want your appliance to end up carefully wrapped in a napkin in the nearby recycling bin. Or, even worse, in your dog’s mouth instead of yours.

The Twin Block appliance might fit together like a puzzle, but there’s nothing puzzling about how to achieve your best and fastest results. Your success really depends on you. Follow Dr. Kathleen Chan and Dr. Ivy Chen and our team’s advice, wear your appliance as directed, and you’ll be on your way to a healthy, comfortable bite and an attractive, confident smile!