Buck Teeth: Causes, Symptoms and Treatment Options

Buck teeth are one of the most commonly discussed dental alignment concerns in the UK, yet the term itself is often misunderstood or used interchangeably with related — but distinct — conditions. Whether you have noticed your own upper front teeth protruding forward, are concerned about a child's bite development, or are simply researching your orthodontic options, understanding the clinical realities of buck teeth is an important first step.

This article explores what buck teeth actually are, what may contribute to their development, how they differ from overbite, and what contemporary orthodontic approaches may be appropriate depending on individual circumstances.

Clinically, this is often assessed within an increased overjet pattern. Buck teeth refer to upper front teeth that protrude noticeably forward beyond the lower front teeth. Clinically, this is most often associated with an increased overjet — the horizontal distance between the upper and lower front teeth. The term is informal; dental professionals typically use "increased overjet" or describe a Class II malocclusion when upper teeth project forward significantly. Severity varies between individuals.

Mixed contributing factors can include skeletal growth and crowding-related alignment pressure. Understanding what causes buck teeth requires looking at both skeletal and dental contributing factors, as well as developmental and behavioural influences. In most cases, several factors interact rather than a single cause being responsible.

Tooth size, jaw shape and the relationship between the upper and lower jaw are all significantly influenced by genetics. If a parent or close relative has protruding upper front teeth or a particular jaw structure, there is a reasonable possibility — though not a certainty — that these characteristics may be inherited. Current clinical understanding acknowledges genetics as a meaningful contributing factor to overjet and jaw development, though individual variation is considerable.

Buck teeth can arise from differences in how the upper and lower jaws develop relative to one another. An upper jaw that grows more forward than the lower jaw — or a lower jaw that is comparatively smaller or positioned further back — can result in the upper front teeth appearing to protrude, even when the teeth themselves are ideally positioned within the jaw.

This distinction matters clinically, because treatment that addresses tooth positioning alone may not fully resolve cases where the underlying cause is primarily skeletal.

Certain prolonged oral habits during early childhood — when the jaws and teeth are still developing — may contribute to changes in tooth positioning over time. The most commonly discussed include:

• Thumb sucking: Persistent thumb or finger sucking beyond the age of approximately three to four years may exert pressure on the developing upper front teeth, potentially encouraging them to tilt forward. The British Orthodontic Society notes that most children naturally stop these habits before permanent teeth emerge, and that early habits alone do not inevitably lead to lasting dental changes.

• Tongue thrusting: In some individuals, the tongue habitually pushes against the upper front teeth during swallowing or at rest. Over time, this repeated forward pressure may be associated with increased overjet, though the relationship is complex and individual.

• Prolonged dummy or bottle use: Extended use beyond typical developmental stages has been associated in some studies with changes in tooth alignment, though evidence regarding long-term dental outcomes remains nuanced.

It is worth noting that the cessation of these habits — particularly before permanent teeth erupt — often allows natural correction to occur, particularly in younger children.

In some cases, overcrowding or differences in tooth size can influence the positioning of the upper front teeth. Missing lower front teeth or additional upper teeth may alter the balance of forces within the mouth, which can contribute to forward tooth positioning over time.

Buck teeth symptoms and signs can range from very mild — where protrusion is barely noticeable — to more pronounced cases that affect function and confidence. Common presentations may include:

• Upper front teeth that visibly extend beyond the lower teeth when the mouth is closed

• Difficulty fully closing the lips at rest

• Changes in facial profile, particularly the relationship between the upper lip, lower lip and chin

• Increased gap between the upper and lower front teeth when biting

• Challenges biting into certain foods comfortably

• In some cases, associated speech difficulties, particularly with certain consonant sounds

• Heightened risk of trauma to the upper front teeth, given their forward position

Not all of these signs will be present in every individual, and their significance varies considerably depending on the severity of the overjet and the individual's anatomy.

These two terms are frequently confused, and understanding the difference supports more informed conversations with dental professionals.

Buck teeth are primarily associated with an increased overjet — a horizontal measurement. An overbite, by contrast, describes how much the upper teeth vertically cover the lower teeth. The two conditions can occur together, separately, or in varying combinations, which is one reason why professional orthodontic assessment is important before any treatment is considered.

A person can have an increased overjet without a significant overbite, and vice versa. Conflating the two can lead to misunderstanding both the cause and the most appropriate approach to correction.

Protruding teeth in young children — including toddlers — are not uncommon during the primary (baby) teeth stage, and in many cases do not indicate a long-term problem. Baby teeth sit differently in the jaw to permanent teeth, and early protrusion does not always persist once adult teeth emerge.

The NHS and the British Orthodontic Society generally recommend that significant dental concerns in children are assessed by a dental professional early, rather than waiting to see whether problems resolve on their own. An assessment does not necessarily mean treatment will be recommended immediately, but it allows a clinician to monitor development and advise on the most appropriate timing if intervention becomes relevant.

For children in the UK, orthodontic treatment through the NHS is available where it is clinically indicated — typically assessed using the Index of Orthodontic Treatment Need (IOTN).

While not all cases are preventable — particularly those with a strong genetic component — there are steps that may support healthier dental development:

• Gently encouraging children to stop thumb sucking or finger sucking, ideally before the age of three to four

• Limiting prolonged dummy use beyond the developmental stage where it provides comfort

• Scheduling regular dental check-ups from an early age to allow monitoring

• Discussing any concerns about oral habits with a dental professional promptly

Early preventive guidance from a dentist or orthodontist can be particularly valuable during the primary teeth years.

Long-term planning is clearer when you review realistic adult correction planning. For many people, mildly protruding teeth do not significantly affect function. However, more pronounced cases of increased overjet may be associated with a range of considerations:

• Oral health maintenance: Teeth that are more forward-positioned or misaligned can be harder to clean effectively, potentially increasing the risk of plaque accumulation and related issues such as gum disease and tooth decay.

• Trauma risk: Protruding upper front teeth are statistically more vulnerable to injury, particularly in children and in contact sports. This risk can often be reduced with a custom mouthguard.

• Speech: In some individuals, the position of the front teeth may influence the production of certain sounds. Speech and language therapists can provide assessment where this is a concern.

• Biting and chewing: Significant overjet may affect the efficiency of biting into certain foods, though many people adapt well.

• Jaw development: In growing individuals, significant malocclusion may have some influence on jaw development over time, though this is highly individual and requires clinical assessment to evaluate.

Problems caused by untreated buck teeth are more likely to be relevant when the overjet is pronounced — minor protrusion is often a cosmetic concern rather than a functional one.

For mild to moderate cases, this aligner suitability guide explains when aligners may help. Treatment for protruding teeth — where clinically indicated or personally desired — depends on the severity, the underlying cause (dental versus skeletal), age, and overall oral health. No single approach is suitable for every individual.

Dental braces remain one of the most established approaches to correcting increased overjet. Fixed braces use brackets and wires to move teeth gradually over time, and can address both the positioning of individual teeth and, in some cases, contribute to changes in the bite relationship.

Current guidance from the British Orthodontic Society supports the use of fixed appliances as an effective option for a range of malocclusions, including increased overjet. Treatment duration varies considerably depending on severity and individual response, but a realistic range for moderate cases is often between 18 months and two to three years. Individual cases may differ significantly, and an orthodontist is best placed to advise on likely timescales.

Braces are suitable for both younger patients (once sufficient permanent teeth have emerged) and adults. However, in adults with a primarily skeletal cause, braces alone may not fully correct the underlying jaw relationship, and combined approaches — such as orthodontics alongside orthognathic surgery — may be discussed in more significant cases.

Clear aligners — a series of custom-made, removable transparent trays — have become an increasingly popular option for many types of tooth movement, including some cases of increased overjet. They offer aesthetic advantages during treatment and are often preferred by adults who wish to avoid the visibility of fixed braces.

Whether clear aligners are suitable for a particular case depends on the complexity and severity of the overjet and any associated bite concerns. Mild to moderate cases may respond well; more complex skeletal discrepancies may require fixed appliances or combined treatment. A qualified orthodontist or dentist with appropriate training can advise on suitability following a thorough clinical assessment.

In children who are still growing, functional appliances — removable or fixed devices designed to influence jaw development — may sometimes be recommended as part of an early or interceptive orthodontic approach. These are typically used to modify the relationship between the upper and lower jaws during the growth phase, potentially reducing the complexity of later fixed brace treatment.

Current orthodontic guidance generally supports interceptive treatment where there is clear clinical benefit and appropriate timing, but this is a highly individual decision made in partnership with a specialist.

This is a common question, and it deserves an honest answer. For children who are still in the primary teeth stage, natural correction can occur as permanent teeth erupt — particularly if contributing habits such as thumb sucking have been addressed early. This is not the same as "natural correction" in the sense of exercises or home remedies.

In adults and older children with established permanent tooth positioning, there is no reliable evidence that natural methods — such as exercises, pressure techniques or tongue posture adjustments — can meaningfully correct an established increased overjet. Significant dental protrusion requires professional assessment and, where treatment is appropriate, clinical intervention.

A direct assessment by our clinical team can clarify what is predictable in your case. If you or your child has noticeably protruding upper front teeth, the most helpful first step is a conversation with a dentist or dental professional. They can assess the severity, discuss contributing factors and, if relevant, refer to an orthodontist for specialist evaluation.

Early assessment is particularly valuable for children, where monitoring jaw development allows treatment to be timed appropriately. Adults can also benefit from orthodontic treatment — it is rarely too late for an assessment, and treatment options have expanded considerably in recent years.

If you have concerns about your bite, your appearance, or how your teeth function, speaking with a dental professional is always a reasonable and supported course of action. A thorough clinical examination provides far more useful guidance than any general article can offer.

This article is for general education only and is not a diagnosis. Dental findings vary and treatment suitability depends on an in-person examination. If you have pain, swelling, trauma, or rapid changes, seek prompt professional care. Always follow advice from a GDC-registered clinician who has examined you.

Written Date: 2026-11-02 | Next Review Date: 2027-11-02