Impacted Canine Teeth: UK Treatment Guide

What is an impacted canine?

Upper canines are the pointed teeth sitting between the incisors and premolars. They have the longest roots of any tooth and are the last anterior teeth to erupt, typically between ages 11 and 13. Because they travel the furthest through bone before erupting, they are the most likely teeth (after wisdom teeth) to become impacted — meaning they fail to erupt into their correct position and remain buried in the bone or palate. Palatal impaction (the canine stuck in the roof of the mouth, behind the other teeth) accounts for approximately 85% of impacted upper canines. Buccal impaction (the canine stuck in the bone on the cheek side) accounts for the remaining 15%. Upper canine impaction affects approximately 2% of the UK population, making it a common reason for orthodontic referral. Impaction is slightly more common in females and often runs in families.

How is an impacted canine detected?

Impacted canines are most commonly detected at routine dental examinations or during orthodontic assessment, typically when a patient is aged 10 to 14. Signs that raise suspicion include the absence of the permanent canine in the dental arch after the expected eruption age, persistence of the baby canine well beyond its normal exfoliation time, and a palpable bulge on the palate. Radiographic confirmation is essential. An OPG (dental panoramic radiograph) gives an initial overview and confirms the impacted canine is present in the bone. To accurately determine the three-dimensional position of the canine — its exact location relative to adjacent roots, its angulation, and whether it is causing resorption of neighbouring teeth — CBCT (cone beam computed tomography) is now routinely used in the UK. CBCT provides a three-dimensional image with lower radiation dose than conventional CT and is considered the gold standard for planning impacted canine treatment.

Surgical exposure — open versus closed technique

Treatment of an impacted canine requires a surgical procedure to uncover it, followed by orthodontic traction to guide it into the arch. There are two main surgical approaches. The open technique involves removing the overlying tissue and bone to expose the crown of the canine, leaving the crown exposed to erupt spontaneously or to receive a bracket immediately. The surgical wound heals around the bracket. This technique is most suitable for buccally positioned canines and some palatal canines in younger patients where spontaneous eruption is expected. The closed technique (also called the tunnel or attachment-first technique) involves a surgeon lifting a flap of gum, bonding a small gold chain or bracket directly to the crown of the impacted canine, and then replacing the gum over the tooth. The chain exits through the gum and is attached to the orthodontic archwire to apply gentle traction. This is the most commonly used technique for palatally impacted canines in the UK. The choice between techniques depends on the canine's position, the patient's age, and the surgeon's and orthodontist's combined assessment.

How does gold chain traction guide the canine into place?

Once the surgical attachment is in place, the orthodontist applies gentle continuous force to guide the canine along a controlled path into its correct position. This traction phase is incorporated into fixed brace treatment. The orthodontic archwire typically needs to be in place before surgery — or is placed shortly after — to provide the anchor system for traction. Forces are usually light and continuous, using elastic chains or coil springs. The canine moves slowly through bone, which is normal and necessary. Space must be created in the arch to receive the canine before it arrives, and this space management is a key part of treatment planning. Regular review appointments allow the orthodontist to monitor progress and adjust the traction mechanics.

Treatment duration, success rates, and what happens if untreated

The traction phase for an impacted canine typically adds 12 to 18 months to overall treatment time, on top of the time required to finish aligning and detailing the rest of the dentition. Total treatment duration including the orthodontic finishing phase is commonly 2 to 3 years for complex cases. Success rates are high — published studies report successful eruption and positioning of the impacted canine in approximately 80 to 90% of cases. Factors affecting prognosis include the degree of canine angulation, proximity to adjacent roots, and whether any root resorption of neighbouring incisors is already present. If an impacted canine is left untreated, several problems can arise over time: resorption of the roots of adjacent incisors (particularly the upper lateral incisor), development of a dentigerous cyst around the unerupted crown, and permanent retention of the baby canine which will eventually be lost, leaving a gap. Early detection and treatment — ideally before age 14 — generally produces better outcomes.

Is impacted canine treatment available on the NHS?

Impacted canine treatment is almost always eligible for NHS treatment in patients under 18, as it is functionally necessary and typically achieves a high IOTN grade. NHS treatment is provided through an orthodontic specialist practice or hospital orthodontic department, often in conjunction with an oral and maxillofacial surgery (OMFS) department for the surgical component. NHS waiting times for treatment can be significant in some regions, but early referral from the GDP when the impaction is detected is the most effective way to minimise delay. Adult patients with impacted canines may still qualify for NHS treatment if the case is sufficiently complex or if they have been on a waiting list since childhood. Private treatment is available for patients seeking faster access or for adults who do not qualify for NHS provision.

Useful related pages

This guide is for general information only. It is not a diagnosis, treatment plan, or substitute for advice from a registered dentist or orthodontist.