Can Aligners Treat Buck Teeth? Managing Overjets Discreetly

Protruding upper front teeth are one of the most common reasons adults enquire about orthodontic treatment. The concern is often partly cosmetic and partly practical — prominent incisors are more exposed to trauma, can be difficult to keep covered by the lip, and sometimes make eating and speech feel awkward.

The desire to address this without a mouthful of metal is entirely understandable, and clear aligners have made discreet treatment a realistic option for many adults. But aligners are not universally suitable, and honest case selection matters far more than marketing.

This article explains what an overjet is, what causes it, how aligner treatment approaches it, and where the limits sit.

Can aligners correct protruding upper front teeth?

In many cases, yes — but it depends on why the teeth protrude. Where the overjet is dental in origin, meaning the front teeth are tipped or positioned forward within otherwise reasonably related jaws, aligners can often reduce it by uprighting and retracting the incisors, sometimes with the addition of interproximal reduction or elastics. Where the overjet is skeletal, arising from an underlying difference in jaw position, aligners can improve the appearance of the teeth but cannot alter the skeletal relationship in an adult. Those cases may need fixed appliances, growth modification in a growing child, or in more marked situations a combined orthodontic and surgical approach. A proper assessment with records and radiographs is what distinguishes the two.

Overjet is the horizontal distance between the biting edges of the upper front teeth and the front surface of the lower ones, measured parallel to the occlusal plane. A small overjet of around two to three millimetres is normal and desirable. An increased overjet is what most people mean by buck teeth, and the greater it becomes, the more noticeable it is and the more exposed the upper incisors are.

These are frequently confused. Overjet is horizontal — how far forward. Overbite is vertical — how far the upper front teeth cover the lower ones when you close. You can have one without the other, though a deep bite and an increased overjet often occur together. Our page on overbite and overjet covers both.

The relative size and position of the upper and lower jaws is largely inherited. An upper jaw positioned relatively forward, a lower jaw positioned relatively back, or a combination of both produces a skeletal overjet. Tooth size and shape are also inherited and contribute.

Prolonged thumb sucking or dummy use beyond the age when the adult front teeth are erupting can tip the upper incisors forward and the lower ones back. Persistent tongue thrust during swallowing can have a similar effect. Habits that stop early often allow substantial self-correction; those that persist tend to leave a lasting pattern.

Where there is insufficient space in the arch, teeth can be displaced forward. Conversely, spacing in the lower arch or loss of lower back teeth can allow the bite to collapse and the upper front teeth to move. See crowded teeth and gaps between teeth.

In adults, advanced periodontitis can allow teeth to drift and flare outwards as their bony support diminishes. This is an important distinction, because in these cases the periodontal condition must be stabilised before any orthodontic movement is considered.

Clear aligners apply light, controlled forces through a sequence of custom trays, each moving teeth a small increment towards a digitally planned position. For overjet reduction, several mechanisms may be used.

Uprighting proclined incisors. Where the upper front teeth are tipped forward, tipping them back reduces the overjet directly. This is the most predictable movement for aligners.

Creating space. Retracting front teeth requires somewhere for them to go. Interproximal reduction — removing a very small amount of enamel between teeth — can create space within the arch. In some cases extractions are required, which is a more involved plan.

Attachments. Small tooth-coloured composite shapes bonded to specific teeth give the aligner something to grip, allowing more complex movements such as root torque. They are removed at the end of treatment.

Elastics. Where a degree of bite correction is needed, elastics running between the arches can help. These are visible during wear, which is worth knowing if discretion is the main reason you chose aligners.

Our ProAligner page explains how the treatment process works from assessment through to retention.

• Mild to moderate overjet that is dental rather than skeletal in origin

• Proclined upper incisors with reasonable jaw relationship

• Overjet associated with crowding that can be resolved with space creation

• Adults who are reliably able to wear trays for the required hours each day

• Marked skeletal discrepancy between the jaws

• Very large overjets requiring substantial bodily tooth movement

• Cases requiring significant extraction space closure

• Active gum disease or untreated decay, which must be addressed first

• Patients who realistically will not manage the wear requirement

That last point deserves emphasis. Aligners only work when they are in the mouth, and the usual requirement is twenty to twenty-two hours a day. Inconsistent wear is the single most common reason treatment falls behind plan.

Arrange an assessment if you notice:

• Upper front teeth that are becoming more prominent over time

• Difficulty closing your lips comfortably over your front teeth

• Front teeth that have chipped or worn unevenly

• Trapping or biting your lower lip behind the upper teeth

• Difficulty biting through food with the front teeth

• Teeth that appear to be drifting or spacing out

• Jaw discomfort, clicking, or a bite that feels unstable

Adult teeth that are actively moving warrant investigation, since drifting can indicate periodontal bone loss rather than simple crowding. Prominent upper incisors also carry a higher risk of trauma, which is relevant for contact sports.

The NHS provides general information about orthodontic treatment at nhs.uk/conditions/orthodontics/.

Treatment begins with a full assessment — clinical examination, photographs, digital scans, and radiographs — from which a plan is produced. You should be shown the projected outcome and told clearly what is and is not achievable, along with alternatives, risks, timescales, and costs in writing.

Trays are then changed at intervals set by your clinician, with review appointments to check progress against plan. Some discomfort for a day or two after each change is normal. Refinements — additional aligners to finish movements that have not fully expressed — are common and should be discussed at the outset rather than presented as a surprise.

Retention is not optional. Teeth have a tendency to relapse towards their original positions, and lifelong retainer wear in some form is the standard recommendation. A fixed retainer, a removable retainer, or a combination may be advised.

Throughout treatment, keeping up with check-ups and hygiene appointments matters, since trays sitting over unclean teeth create a decay risk.

• Overjet is horizontal protrusion; overbite is vertical overlap — they are different measurements

• Dental overjets often respond well to aligners; skeletal ones generally do not

• Space must be created for front teeth to retract into, via interproximal reduction or extractions

• Attachments and elastics are frequently needed and are visible during wear

• Twenty to twenty-two hours of daily wear is typically required

• Gum disease and decay must be stabilised before orthodontic movement

• Retention after treatment is a long-term commitment, not an optional extra

Clear aligners have made discreet overjet treatment a genuine option for many adults, and for dental overjets with reasonable jaw relationships the results can be very satisfying. What determines whether they are right for you is not the technology but the diagnosis — specifically, whether the protrusion originates in the position of the teeth or the position of the jaws.

Be wary of any assessment that does not include proper records, and expect a frank conversation about attachments, elastics, wear requirements, refinements, and lifelong retention. Treatment that is planned honestly tends to finish where it said it would.

To discuss whether aligners suit your situation, you are welcome to arrange an appointment at Wimpole Dental, 22 Wimpole St, London W1G 8GQ, or call 020 7183 0692.

Dental symptoms and treatment options should always be assessed individually during a clinical examination.

This article is for general educational information only and is not professional dental advice, diagnosis, or a treatment recommendation. Information here is general and cannot replace an in-person assessment by a qualified, GDC-registered dental professional. Symptoms, suitability, fees, timelines, and outcomes vary according to individual clinical circumstances. If you have pain, swelling, or other concerning symptoms, seek prompt professional dental care. Always request a written treatment plan and cost estimate before proceeding with treatment.

Written Date: 21 August 2026

Next Review Date: 21 August 2027