Overbite and Overjet: Differences, Impacts, and Treatment Solutions

Many people notice that their teeth look “too forward” or “too covered” and immediately assume that something is wrong with their tooth alignment. In fact, overbite and overjet are normal conditions that almost everyone has. What really matters is how large they are.

If the size is still within the normal range (around 2–3 mm), it is not dangerous and usually does not need treatment. However, when it exceeds the normal limit, the condition is called malocclusion and may require orthodontic treatment.

What Are Overbite and Overjet?

Overbite (Normal)

Overbite is the vertical overlap of the upper front teeth over the lower front teeth when the mouth is closed. A normal overbite is about 2–3 mm, where the upper teeth slightly cover the lower teeth.

This is important for:

1. Proper chewing function

2. Protecting the back teeth

3. Maintaining a stable bite
   

Overjet (Normal)

Overjet is the horizontal distance between the upper front teeth and the lower front teeth. A normal overjet is also around 2–3 mm.

Overjet helps with:

1. Even distribution of chewing pressure

2. Clear speech function

3. A balanced and proportional smile

When Do Overbite and Overjet Become Abnormal?

Overbite and overjet are considered abnormal when they exceed normal limits and start to affect function, comfort, or oral health.

This condition is known as malocclusion, which means improper alignment of the teeth and jaws.

Types of Problems Related to Excessive Overbite and Overjet

1. Deep Bite

   A deep bite occurs when the overbite is too deep (more than 4 mm), causing:

   • Upper front teeth to excessively cover the lower front teeth

   • Lower front teeth to be barely visible when smiling

   Possible effects:

   • Faster wear of the front teeth

   • Irritation of the gum tissue behind the upper teeth

   • Jaw muscle tension or discomfort

2.  Protrusion (Teeth Too Forward)

   Protrusion happens when the overjet is too large, making the upper front teeth look very forward.

   Possible effects:

   • Front teeth are more prone to fracture from trauma

   • Difficulty closing the lips comfortably

   • Facial and smile aesthetics may be affected

3. Combination Malocclusion

   In some patients, excessive overbite and overjet occur together, often with:

   • Imbalance between the upper and lower jaws

   • Misaligned tooth positions

   • Chewing function problems

This is why a complete clinical examination is essential and not based on appearance alone.

What Happens If Malocclusion Is Left Untreated?

Not all malocclusions cause immediate problems. However, in the long term, they may lead to:

1. Worn, cracked, or fractured front teeth

2. Chewing difficulties

3. Jaw joint pain or discomfort

4. Difficulty cleaning teeth, increasing the risk of cavities and gum disease

5. An unbalanced smile that can reduce self-confidence

How Are Abnormal Overbite and Overjet Corrected?

If overbite or overjet exceeds normal limits, correction can be done through personalized orthodontic treatment, such as:

1. Braces

2. Clear aligners (such as Invisalign)

3. Special orthodontic approaches for growing patients

4. Combination orthodontic treatments based on the patient’s bite and jaw condition

There is no single treatment that fits everyone. Each case is unique and requires careful evaluation before deciding the best orthodontic plan.

Orthodontic Treatment at Onyx Dental Center

At Onyx Dental Center, every orthodontic treatment begins with a thorough examination, detailed bite analysis, and open discussion about your needs and treatment goals.

We believe orthodontic care should focus on:

1. Balanced bite function

2. Healthy gums and supporting tissues

3. A natural and proportional smile

With this approach, orthodontic treatment at Onyx Dental Center is not just about straight teeth, but about long-term oral health and quality of life.

Conclusion

Overbite and overjet are normal parts of dental alignment as long as they remain within the 2–3 mm range.

When they become excessive and develop into conditions such as deep bite or protrusion, they may affect function, comfort, and oral health over time.

With proper diagnosis and a personalized orthodontic plan, these conditions can be corrected gradually while preserving the natural beauty of your smile.

At Onyx Dental Center, we combine precision, aesthetics, and a holistic treatment philosophy to help every patient achieve a healthy, harmonious, and confident smile.

Learn more about Onyx Dental Center Treatments:

• 360 Smile Philosophy

• Smile Makeover

• Orthodontic and Invisalign

Proper consultation is always the first step toward determining the most suitable solution for your individual needs.

References

• Jain, N. (2021). Deep bite: Its classification, etiology, clinical features, diagnosis & treatment modalities. International Journal of Health Sciences, 5(S2), 222–229. https://doi.org/10.53730/ijhs.v5nS2.5659

• Tahamtan, S., Nikbakht, M. H., Hasanpour, M., & Panahandeh, M. J. (2025). The impact of overjet, overbite, and anterior crowding on oral health-related quality of life of adolescents: A cross-sectional study. Journal of Education and Health Promotion, 14(1), 298.https://doi.org/10.4103/jehp.jehp_660_24