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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. Cronin 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 Langley orthodontic office, Dr. Cronin 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 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 Langley 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. Cronin 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!

It’s a new year, and it couldn’t come fast enough for many of us! Let’s do our part to make this a better year in every way—and you can start by making this the year you quit smoking once and for all.

You know that smoking is very damaging to your body. Smokers are more likely to suffer from lung disease, heart attacks, and strokes. You’re at greater risk for cancer, high blood pressure, blood clots, and blood vessel disorders. With far-reaching consequences like this, it’s no surprise that your oral health suffers when you smoke as well.

How does smoking affect your teeth and mouth?

• Appearance

While this is possibly the least harmful side effect of smoking, it’s a very visible one. Tar and nicotine start staining teeth right away. After months and years of smoking, your teeth can take on an unappealing dark yellow, orange, or brown color. Tobacco staining might require professional whitening treatments because it penetrates the enamel over time.

• Plaque and Tartar

Bacterial plaque and tartar cause cavities and gum disease, and smokers suffer from plaque and tartar buildup more than non-smokers. Tartar, hardened plaque which can only be removed by a dental professional, is especially hard on delicate gum tissue.

• Bad Breath

The chemicals in cigarettes linger on the surfaces of your mouth causing an unpleasant odor, but that’s not the only source of smoker’s breath. Smoking also dries out the mouth, and, without the normal flow of saliva to wash away food particles and bacteria, bad breath results. Another common cause of bad breath? Gum disease—which is also found more frequently among smokers.

• Gum Disease

Smoking has been linked to greater numbers of harmful oral bacteria in the mouth and a greater risk of gingivitis (early gum disease). Periodontitis, or severe gum disease, is much more common among smokers, and can lead to bone and tooth loss. Unsurprisingly, tooth loss is also more common among smokers.  

• Implant Failure

Tooth implants look and function like our original teeth, and are one of the best solutions for tooth loss. While implant failure isn’t common, it does occur significantly more often among smokers. Studies suggest that there are multiple factors at work, which may include a smoker’s bone quality and density, gum tissue affected by constricted blood vessels, and compromised healing.

• Healing Ability

Smoking has been linked to weakened immune systems, so it’s harder to fight off an infection and to heal after injury. Because smoking affects the immune system’s response to inflammation and infection, smokers suffering from gum disease don’t respond as well to treatment. Smokers experience a higher rate of root infections, and smoking also slows the healing process after oral surgeries or trauma.

• Dry Socket

Smoking following a tooth extraction can cause a painful condition called “dry socket.” After extraction, a clot forms to protect the tooth socket. Just as this clot can be dislodged by sucking through a straw or spitting, it can also be dislodged by the force of inhaling and exhaling while smoking.

• Oral Cancer

Research has shown again and again that smoking is the single most serious risk factor for oral cancer. Studies have also shown that you reduce your risk of oral cancer significantly when you quit smoking.

• Consequences for Orthodontic Treatment

Finally, if this is the year that you’re investing the time and effort needed to create an attractive, healthy smile with orthodontic treatment, don’t sabotage yourself by smoking!

Cosmetically, smoking doesn’t just discolor your tooth enamel—tar and nicotine discolor your aligners and braces as well. If one of the reasons you chose clear aligners or ceramic brackets is for their invisible appearance, the last thing you want is yellow aligners and brackets.

More important, smoking, it’s been suggested, can interfere with your orthodontic progress. When blood vessels are constricted, your gums, periodontal ligaments, and bones can’t function at their healthy best, moving your teeth where they need to be steadily and efficiently. This means that your treatment could take longer. And if your smoking has caused gum disease, you might have to put any orthodontic treatment on hold completely until it’s under control.

Quitting smoking is a major accomplishment that will improve your life on every level. It’s always a good idea to talk to Dr. Cronin for strategies to help you achieve your wellness goals for the new year. Make this the year you stop smoking, and the year your health improves in countless ways because you did.

Modern dentistry has made the most of today’s technological innovations. And we’ve come a long way from the fraying sticks our ancestors used as toothbrushes.

On the other hand, while it’s a lot better than a fraying stick, the manual toothbrush model you’ve used for years might be ready for an upgrade. Should you take this opportunity to try out some new technology offering all the bells and whistles? Let’s answer that question by asking a few more questions.

Happy with your manual brush?

If you like your manual toothbrush and it’s doing the job, by all means, stick with it. But even your old familiar brush can evolve:

• There are lots of bristle options, but soft bristles are almost always the way to go. Medium and hard bristles can be too abrasive for your enamel.
• Heads come in a variety of sizes, so make sure the head size is comfortable. You want to be able to maneuver to reach every tooth surface, which a too-large brush head just can’t do.
• Try a different handle shape if you’re having trouble maneuvering and keeping a firm grip.
• Change your brush regularly. Brushes are effective for about three months before the bristles start to fray and breakdown. This is a good opportunity to experiment with different brands and styles.

Does your old brush suit your current needs?

Different types of manual toothbrushes are available for effective and comfortable brushing when you need options that a typical brush doesn’t provide:

• Special orthodontic toothbrushes are designed with bristles trimmed to fit around brackets and wires and smaller heads to reach into tight places.
• For those with mobility issues, brushes with larger or easy-grip handles make cleaning more comfortable.
• Brushes with extra-soft bristles are available if you have enamel erosion or sensitive gums.
• Because many women find their gums become especially sensitive during pregnancy, there are brushes designed especially for moms-to-be.

Is it time to go electric?

If you haven’t tried an electric toothbrush before, you might find that getting braces is a great reason to give one a spin.

• Electric toothbrushes can outperform manual models. A dedicated brusher might manage hundreds of brushstrokes for each minute of brushing, while an electric brush can provide thousands. If, despite your regular brushing, you have plaque build-up, an electric brush might be a good alternative to your manual brush.
• Models are available which can alert you when you’re brushing too hard—which is important for your enamel if you’re a heavy-handed brusher.
• If you tend to *think* you’ve brushed for the recommended two minutes, but have *actually* brushed 32 seconds, some electric brushes come with timers!
• There are tapered electric orthodontic brush heads designed just for people with braces.
• Electric brushes have bigger handles and can be easier to grip.

Is your current brush doing the job?

So, should you stick with the familiar toothbrush that’s worked for you all these years, or take this opportunity to try out some new technology that offers all the bells and whistles? The answer is clear: the right brush for you is the one that works!

If your regular checkups show that plaque is under control, you’re doing just fine with the brush in hand. If you or Dr. Cronin notice plaque buildup, it’s time to consider making some changes. Whether it’s a question of tools, techniques, or time spent brushing, your Langley dental team has the answers you need for state-of-the-art dental hygiene.