Vertical
Overbite direction
Horizontal
Overjet direction
Key takeaways
- An overbite is vertical (up-and-down overlap); an overjet is horizontal (upper teeth pushed forward).
- Both can affect chewing, speech, jaw comfort, and how you feel about your smile.
- Clear aligners can correct many overbite and overjet cases, though some deeper skeletal cases need other options.
- Early evaluation for children helps guide jaw growth at the right time.
- A digital scan and consultation with Dr. Himani Gupta can confirm the best plan for you.
Overbite vs. Overjet: The Quick Answer
The simplest way to remember it: an overbite goes up and down, while an overjet goes front and back. An overbite describes how far your upper front teeth overlap your lower front teeth vertically. An overjet describes how far your upper front teeth sit ahead of your lower teeth horizontally. Many people confuse the two because both involve the upper teeth, but the direction of the problem is what sets them apart.
What is an overbite?
An overbite is a vertical overlap of the front teeth. A small overlap is normal and healthy. When the upper teeth cover too much of the lower teeth, it is called a deep bite. In severe cases, the lower teeth can bite into the roof of the mouth or into the gum behind the upper teeth.
What is an overjet?
An overjet is a horizontal gap where the upper front teeth protrude forward of the lower front teeth. People sometimes call this “buck teeth.” The larger the horizontal distance, the more noticeable it tends to be, and the more it can affect lip closure and comfort.
The key visual difference at a glance
Look at your teeth from the side. If the top teeth stick out in front of the bottom teeth, that points to an overjet. Now look from the front while gently closing. If the top teeth hide most of the bottom teeth, that points to an overbite. It is also possible to have both at the same time.
How to Tell the Difference at Home
You can get a rough idea at home, but only a dentist can measure it accurately. A quick mirror check helps you decide whether to book an assessment, not to diagnose yourself.
Simple self-check in the mirror
Stand in front of a mirror in good light and bite your teeth together gently. From the front, notice how much of your lower front teeth disappear behind the upper ones. Then turn to the side and check whether the upper teeth clearly stick out beyond the lower ones. Take a photo from both angles so you can show it at your visit.
Vertical vs. horizontal: the core distinction
Keep the two directions separate in your mind. Vertical overlap is the overbite. Horizontal protrusion is the overjet. A person can have a deep overbite with very little overjet, a large overjet with a normal overbite, or a mix of both. This is why a professional measurement matters before any plan.
When to see a dentist for a professional assessment
Book a visit if you notice teeth that stick out, difficulty closing your lips comfortably, uneven front-tooth wear, jaw discomfort, or lower teeth touching the gum behind your upper teeth. A dentist will measure both directions and check how your jaws fit together, giving you an accurate picture rather than a guess.
What Causes Overbite and Overjet?
Most bite differences come from a mix of inherited jaw shape and early childhood habits. Understanding the cause helps guide the most suitable plan for each person.
Genetic and skeletal factors
The size and position of your jaws are largely inherited. If your upper jaw is longer or your lower jaw is set further back, an overjet is more likely. If the jaws overclose vertically, a deep overbite is more likely. Tooth size and crowding also play a part.
Childhood habits
Habits that push on growing teeth and jaws can create or worsen a bite problem. Common contributors include prolonged thumb-sucking, extended pacifier use, and long-term mouth breathing. The longer these continue during active growth, the greater the effect on tooth position.
Why early evaluation matters for children
Children benefit from an early bite check because their jaws are still growing, which gives more room to guide development gently. Dr. Gupta has a strong interest in early guidance for young patients and functional appliances that work with natural growth. You can learn more about care for younger patients on our Pediatric Dentistry page.
Why Correcting Bite Problems Matters
Correcting an overbite or overjet is about function and long-term health, not only appearance. Left unchecked, bite problems can lead to wear, discomfort, and everyday frustration.
Effects on chewing, speech, and jaw health
When teeth do not meet the way they should, chewing can feel less efficient and certain sounds may be harder to form clearly. A pronounced overjet can make it harder to close the lips at rest, and a deep overbite can strain the jaw over time.
Long-term wear on teeth and gums
Teeth that hit at the wrong angle wear down faster and unevenly. A deep overbite can also irritate the gum tissue behind the upper front teeth. Protruding front teeth sit more exposed, which can raise the risk of chips or injury during a fall or knock.
Impact on smile confidence
Many people simply feel more at ease once their front teeth line up in a balanced way. Feeling comfortable to smile in photos, at work, and with friends is a genuine and valid reason to seek treatment.
Can Clear Aligners Help?
Yes, clear aligners can correct many overbite and overjet cases by gradually moving teeth into a healthier position. The right fit depends on how much of the problem is in the teeth versus the jaw bones.
How clear aligners move teeth to correct bites
Clear aligners are a series of custom trays that apply gentle, planned pressure to shift teeth step by step. Each set moves the teeth a small amount, and you progress through the series until the target position is reached. For bite correction, small tooth-colored attachments are often added to help guide specific movements.
Evidence for aligners in deep bite correction
Deep bites, where the top front teeth overlap the bottom teeth too much, used to be considered tricky territory for clear aligners. But a clinical trial on deep bite correction found that patients treated with clear aligners saw real improvement, along with strong satisfaction with the treatment experience. A broader review of clear aligner therapy backs this up, offering a fuller picture of where aligners tend to shine and where they still have some limits. This research is a good reminder that aligners aren’t just for crowding or spacing anymore. They’re a strong option for bite issues too.
Cases better suited to other treatments
Some deep skeletal cases, where the jaw bones themselves are the main issue, may need approaches beyond aligners alone. This is more common with severe overjet caused by jaw position rather than tooth position. A proper assessment sorts this out early, so your plan is realistic from day one.
What Happens at Your Consultation
Your consultation is where guesswork ends, and a clear plan begins. You will get accurate measurements, a realistic timeline, and honest options for your situation.
Digital scans and treatment planning
A digital scan captures your teeth quickly and comfortably, with no messy molds. From this, your bite is measured in both directions, and a step-by-step plan is mapped out so you can see the intended path.
Estimated timelines and expectations
Timelines vary with the size of the correction. Milder cases move faster, while deeper overbites or larger overjets take longer. You will receive an estimate based on your own scan rather than a generic figure, along with what results are realistic.
Care options for children and teens
For younger patients, early guidance can work with natural jaw growth to steer development gently. Dr. Gupta is particularly interested in early guidance and functional appliances for children, and she will recommend the right timing rather than starting too soon.
Canadian Dental Care Plan
At Skyview Ranch Dental Clinic, affordability and accessibility are priorities. The clinic proudly supports the Canadian Dental Care Plan (CDCP). This federal initiative makes dental care more accessible to Canadians without private insurance.
What Is the CDCP?
The CDCP is a government-funded program covering essential preventive and restorative dental services for eligible individuals. It helps reduce financial barriers to necessary dental care.
If you have delayed treatment due to cost concerns, this program may provide meaningful support.
Who Is Eligible?
You may qualify if:
- You do not have private dental insurance
- Your adjusted family net income is under $90,000
- You are a Canadian resident
- You have filed your previous year’s tax return
Eligibility is subject to government criteria. Contact the clinic for confirmation.
Services Covered May Include:
- Dental exams and cleanings
- X-rays
- Fillings
- Root canal treatment
- Tooth extractions
- Complete and partial dentures
- Fluoride treatments and scaling
Coverage varies based on individual eligibility. The clinic team will help verify benefits and explain any co-payment details.
Using Your CDCP Benefits at the Clinic
If you are eligible or enrolled:
- Call and mention your CDCP status when booking.
- Bring eligibility documentation to your appointment.
- The team will verify your coverage.
- Receive care aligned with your approved benefits.
For more details or to book your appointment, visit the Contact Us page.
Convenient Location in Calgary
Skyview Ranch Dental Clinic is easily accessible for families across Calgary.
Use this Google Maps link to find the clinic location, or follow these Driving Directions to plan your visit.
New patients can save time by completing the Patient Form online before their appointment.
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Meet Dr. Himani Gupta
Since arriving in Canada in 2007, Dr. Himani Gupta has built her career on a simple belief: exceptional dentistry should feel personal, not clinical. A graduate of Dalhousie Dental University in Halifax, she made Calgary her home and has been caring for smiles in the community ever since.
Dr. Himani Gupta, a Top 1% Diamond+ Invisalign Provider in Calgary, never stopped learning, currently furthering her postgraduate education at the Las Vegas Global Institute and having completed both CORE I and CORE II training. She offers orthodontic treatment including braces and retainers, with a particular passion for Early Interceptive Orthodontics, catching alignment issues early to guide young smiles onto the right path. Cosmetic dentistry is another area where her attention to detail shines, always with the same goal: quality care in a warm, relaxing environment.
Outside the clinic, Dr. Gupta’s world revolves around her young daughter. She and her husband love exploring new destinations across Canada and beyond, and she’s an avid hiker and camper. Back home, she trades her dental tools for kitchen ones, cooking for family and friends and picking up new recipes along the way.
Frequently asked questions
Q: What is the difference between an overbite and an overjet?
An overbite is a vertical overlap, meaning the upper front teeth cover too much of the lower front teeth. An overjet is horizontal, meaning the upper front teeth stick out ahead of the lower teeth. It is possible to have both at once, which is why a professional measurement is helpful.
Q: Can clear aligners fix an overbite?
Yes, clear aligners can improve many overbite cases by gently moving teeth into a better position, often with small tooth-colored attachments to guide the movement. Very deep skeletal cases may need other approaches, so an assessment confirms whether aligners suit you.
Q: Is Invisalign or braces better for overjet correction?
Both can work well, and the best choice depends on your case. Invisalign clear aligners are nearly invisible and comfortable and suit many overjet cases, while fixed braces cover a very wide range of movements. Dr. Himani Gupta can recommend the right fit after examining your teeth and jaws.
Q: How long does it take to correct an overbite with clear aligners?
Timelines vary with how much correction is needed. Milder overbites move faster, while deeper ones take longer. You will get a personalized estimate based on your own digital scan rather than a generic figure.
Q: At what age should a child be evaluated for a bite problem?
Around age seven is a helpful time for a first bite check, because the jaws are still growing and there is more room to guide development gently. Dr. Gupta has a strong interest in early guidance and will advise the right timing rather than starting too early.
Q: Is an overbite or overjet harmful if left untreated?
It can be. Over time, bite problems can lead to uneven tooth wear, gum irritation, jaw strain, and an increased risk of front-tooth chips, especially with a large overjet. Correcting the bite supports long-term comfort and dental health.
Remember: An overbite is vertical, and an overjet is horizontal; both can often be improved with clear aligners after a proper assessment.
Disclaimer: This article is for general information only and is not a substitute for a personal dental examination. Please consult a qualified dentist about your own situation.
