Impacted Teeth and Aligners: Can You Pull a Tooth Into Place?

The short answer is that aligners alone cannot pull a fully impacted tooth through bone, but they often form part of the treatment that does.

That distinction sounds like a technicality. It is actually the whole point, and it comes down to a simple mechanical fact: aligners transmit force through contact with the crowns of teeth that are already in the mouth. A tooth buried beneath the gum presents no surface for a tray to engage. Whatever force is needed has to come from somewhere else.

What follows explains where that force comes from, and what aligners do contribute.

An impacted tooth is one that has failed to emerge into its expected position in the arch, whether because it is blocked, misdirected, or has simply stopped moving.

Fully impacted means entirely enclosed in bone or soft tissue, with nothing visible in the mouth.

Partially impacted means the tooth has broken through the gum but has not reached its proper position — it may be tilted, rotated, or jammed against a neighbour.

The distinction matters because the two behave very differently in treatment. A partially erupted tooth offers a surface that an appliance can engage; a fully impacted one does not.

Wisdom teeth are the most frequently impacted, followed by upper canines, which affect around two to three per cent of people. Premolars, second molars and occasionally central incisors can also be affected. Our article on impacted canines and the treatment options available covers the canine case in detail, since it is the one most often treated orthodontically.

Insufficient space is the most common cause. If the arch cannot accommodate every tooth, the last to arrive has nowhere to go. Our article on why crowding tends to show in the lower teeth first explains how space deficits develop over time.

Abnormal eruption path. A developing tooth may angle towards the palate, the lip, or sideways into a neighbouring root. Genetic factors, early loss of baby teeth and the presence of extra teeth all contribute.

Physical obstruction. A cyst, a supernumerary tooth, dense bone or a retained baby tooth can block the path directly. This is generally identified on imaging before any plan is made.

All orthodontic movement relies on the same biology: sustained light force triggers bone resorption ahead of the tooth and deposition behind it, so the tooth migrates through its socket. Moving an impacted tooth uses that process, but over a much greater distance and through undisturbed bone.

Two constraints shape how it is done.

Direction has to be precise. The tooth is often travelling close to the roots of teeth already in position. Pulling it along the wrong vector risks damaging those roots — a complication that produces no symptoms while it is happening.

Force has to be light. Excessive force raises the risk of root resorption in the tooth being moved as well as its neighbours, and can stall movement altogether by crushing the blood supply in the periodontal ligament.

Meeting both requirements means having an anchorage system rigid enough to define the direction of pull and fine enough to deliver a small force. That is what a fixed appliance provides.

Radiographs establish the tooth's presence and approximate position. A CBCT scan provides a three-dimensional view — exactly where the tooth sits, how it is angled, how much bone covers it, and whether it is damaging adjacent roots. Planning the direction of traction depends on that information.

A minor procedure under local anaesthetic lifts a flap of gum, removes a small amount of covering bone where needed, and bonds a bracket or button to the exposed crown. A fine chain is attached, emerging through or beneath the gum depending on the technique chosen.

The chain is connected to the appliance and gentle, sustained force applied along the planned path over weeks to months. Progress is monitored and the direction adjusted as the tooth moves.

Once in the arch, the tooth typically needs rotating, uprighting and settling into the bite. These are conventional movements of an erupted tooth — and this is where aligners come back into the picture.

Create space. Before an impacted tooth can be brought in, there must be a destination. Moving the adjacent teeth apart is ordinary movement of erupted teeth, which aligners handle well.

Hold space open. During traction, the space needs maintaining against the tendency of neighbouring teeth to close it.

Guide partially erupted teeth. Where a tooth has already broken through and the remaining movement is largely within the arch rather than through bone, aligners with appropriately placed attachments may be able to complete it.

Finish the case. Rotation, uprighting and settling after the tooth has arrived are standard aligner movements.

Retain. The retention phase afterwards is frequently managed with clear retainers.

Apply traction to a buried tooth. There is no crown to grip, and no way for a tray to deliver a directed pull through bone.

Provide rigid anchorage. A removable tray flexes. Traction demands a stable framework to pull against, which fixed brackets and a wire supply.

Control three-dimensional force with the precision traction requires. Extrusion and root torque — the movements most needed here — are the ones aligners find hardest even on erupted teeth.

Most contemporary plans use both appliance types in sequence: aligners to create and hold space, a sectional fixed appliance for the traction phase, then aligners for finishing and retention.

This is often better tolerated than it sounds. The fixed component may be confined to a few teeth and worn for a limited period rather than throughout treatment. Our article on switching from braces to clear aligners covers how the handover is managed, and our ProAligner page explains what the aligner phases involve.

Impacted teeth are frequently symptom-free and discovered incidentally. The situations worth acting on are:

• A baby tooth still in place well beyond the age it should have been lost

• A gap in the arch where a tooth should have appeared

• Swelling, tenderness or a firm lump in the gum, particularly in the palate above the canine area

• Adjacent teeth that have shifted, tipped or become mobile

• Unexplained pressure or discomfort in the jaw

Earlier identification generally means simpler treatment, because interceptive measures are still available and the tooth has moved less far off course. Treatment in adults is entirely possible, though it tends to take longer.

Partially erupted teeth are particularly prone to decay and localised gum infection, because the overlying gum forms a pocket that traps debris. A small-headed brush and daily interdental cleaning help. Our article on flossing technique covers the method.

During treatment, the surgical site needs to heal cleanly and the adjacent teeth need to stay sound. Fixed components add plaque-retentive surfaces; decalcification around brackets is the most common avoidable complication of orthodontic treatment. Aligners should be removed for anything other than water.

Afterwards, a tooth that has been moved a long distance has a greater tendency to drift back, so retention is taken seriously. Our fixed retainer page explains the options.

• Aligners grip erupted crowns, so they cannot apply traction to a tooth still buried in bone

• Full impaction is managed with surgical exposure followed by fixed-appliance traction

• Aligners contribute meaningfully to space creation, space maintenance, final alignment and retention

• Partially erupted teeth are a different case and may respond to aligners with appropriate attachments

• Upper canines are the impacted teeth most often treated orthodontically; wisdom teeth are usually removed instead

• Combined plans that use both appliance types in sequence are now common

Can impacted canines be treated with clear aligners alone?

Generally not, where the canine is fully impacted. The tooth needs surgical exposure so an attachment can be bonded to it, and fixed appliances are normally used for the traction phase. Aligners are commonly used before and after — creating space beforehand, and completing the alignment once the canine is in the arch.

How long does it take to move an impacted tooth into place?

Moving an impacted canine from exposure into the arch typically takes six to eighteen months. Overall treatment, including space creation and final alignment, often runs longer. The timeline depends on how far the tooth has to travel, its angulation, and how it responds to force.

Is surgical exposure of an impacted tooth painful?

The procedure is done under local anaesthetic, so you should not feel pain at the time. Discomfort, swelling and tenderness for a few days afterwards are usual and are typically managed with over-the-counter pain relief and cold compresses. Most people find soreness settles within about a week.

What happens if an impacted tooth is left untreated?

Some remain stable and symptom-free for years. Others form cysts around the unerupted crown, resorb the roots of adjacent teeth, or become infected if partially erupted. Which of those applies is determined by radiographic monitoring, which is why periodic imaging is recommended even when there are no symptoms.

Are impacted teeth more common in adults or children?

They are most commonly diagnosed in the teenage years, when the permanent teeth are expected to have arrived. Upper canines usually erupt between eleven and thirteen, and investigation is recommended if they have not appeared by then. Many adults discover impacted teeth incidentally on imaging much later.

Can an impacted wisdom tooth be moved with aligners?

Wisdom teeth are rarely repositioned orthodontically. Where an impacted wisdom tooth is causing pain, infection or damage to the tooth in front, removal is the usual management. Their position at the back of the arch makes orthodontic access difficult and their functional contribution limited.

If a tooth has not appeared when expected, a baby tooth has been retained, or you have noticed swelling or shifting in one area, an assessment with appropriate imaging is the useful first step.

You can contact our team to arrange an appointment at our Wimpole Street practice. Our ProAligner page explains clear aligner treatment, and our wisdom teeth page covers the most commonly impacted tooth of all.

This article provides general information about impacted teeth and orthodontic treatment and does not constitute individual dental advice. Impaction can only be diagnosed and planned through clinical examination and appropriate radiographic imaging, and suitable treatment varies considerably between patients. Some cases require referral for surgical or orthodontic care. Wimpole Dental is regulated by the Care Quality Commission, and our clinicians are registered with the General Dental Council.

Next review due: 3 September 2027