Wisdom Teeth, Braces and Orthodontic Treatment — What You Need to Know

Do wisdom teeth cause crowding?

The belief that wisdom teeth push teeth forward and cause crowding is widespread but not well supported by evidence. Research shows late lower incisor crowding occurs at similar rates whether wisdom teeth are present, absent, or impacted. It is caused primarily by late jaw growth and natural ageing of the dentition, not wisdom tooth pressure. The British Dental Association and NHS no longer recommend routine prophylactic removal of asymptomatic wisdom teeth.

When wisdom teeth do matter

Not all wisdom teeth can be ignored. Partially erupted wisdom teeth can cause pericoronitis — a painful infection of the surrounding gum — and recurrent pericoronitis is a reason for extraction in its own right. An impacted wisdom tooth that is resorbing the root of the adjacent second molar is rare but needs early action. Impacted wisdom teeth lying in the path of tooth movement may need to be removed before or during orthodontic treatment, particularly where upper molars are being moved backwards to correct a Class II bite or to create space without extracting front teeth. Fully impacted, asymptomatic wisdom teeth are typically monitored rather than removed. Where space is being opened near a wisdom tooth for a future implant, extraction may be needed to avoid complications. Your orthodontist will review an OPG (panoramic) X-ray and advise based on your specific anatomy.

Before braces — is removal needed?

Not automatically. Your orthodontist will review your X-rays at the treatment planning stage and assess whether wisdom teeth interfere with the planned tooth movement. In many cases, wisdom teeth are simply monitored throughout treatment. Extraction is only recommended where there is a specific clinical reason — impaction in the path of movement, infection risk from a partially erupted tooth, or space requirements for a future implant. Removing healthy, asymptomatic wisdom teeth solely on the assumption they will cause crowding is not evidence-based.

After braces — do wisdom teeth cause relapse?

No strong evidence supports wisdom teeth as a primary driver of post-treatment relapse. Studies following patients for many years after orthodontic treatment show similar relapse rates regardless of whether wisdom teeth were present, removed, or impacted. The primary cause of relapse is not wearing retainers as prescribed. The British Orthodontic Society advises that retainers should be worn indefinitely, and consistent retainer use is the only evidence-based way to maintain results. If your teeth have moved after braces, the most likely explanation is inadequate retainer wear.

During treatment

It is common for wisdom teeth to begin erupting during orthodontic treatment, particularly in teenagers and young adults. In most cases this causes no problem and treatment continues as planned. Your orthodontist monitors progress via periodic X-rays. Extraction may be considered if an erupting wisdom tooth begins affecting the position of the adjacent second molar or disrupts the treatment plan — but this is assessed case by case rather than as a precaution. If you develop pain, swelling, a bad taste or difficulty opening your mouth, that may be pericoronitis — see a dentist promptly rather than waiting for your next orthodontic review.

Wisdom teeth and clear aligners

Unerupted wisdom teeth are rarely a problem for clear aligner treatment, because the trays only cover erupted teeth. A wisdom tooth that starts erupting during a long aligner course can cause discomfort and may stop the back of the final trays fitting properly, so if eruption is expected your orthodontist may suggest extraction before treatment starts. A partly erupted wisdom tooth also makes it harder to clean around the second molar, which matters for any orthodontic patient.

NHS vs private wisdom tooth extraction

Wisdom tooth removal is available on the NHS where there is a clinical reason, such as recurrent pericoronitis, decay or gum disease that cannot be treated, or damage to the neighbouring tooth. Following NICE guidance, healthy wisdom teeth that cause no symptoms are not removed as a precaution on the NHS in England. A straightforward NHS extraction falls under the Band 2 charge of £76.60; more complex surgical cases may be referred to a hospital oral surgery department. Privately, expect roughly £150 to £400 per tooth for a routine extraction and £300 to £600 or more for a surgical impaction.

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.