One of the most persistent myths in orthodontics is that wisdom teeth push other teeth forward, causing crowding to worsen or orthodontic results to relapse. Patients worry about it before starting treatment, and adults who had braces years ago often blame their wisdom teeth when their front teeth begin to crowd again. The reality is more nuanced — and considerably more reassuring. This guide cuts through the confusion to give you a clear, evidence-based picture of how wisdom teeth interact with orthodontic treatment, when their removal is genuinely necessary, and why your retainer matters far more than your wisdom teeth ever will. Key takeaway The claim that wisdom teeth cause front tooth crowding is not well supported by the research. Multiple systematic reviews have found no consistent evidence that wisdom tooth eruption directly causes or worsens anterior (front) tooth crowding. Lower incisor crowding in adults is primarily driven by the natural forward drift of teeth throughout life, jaw growth continuing into the mid-twenties, and inadequate retainer wear after orthodontic treatment — not by pressure from wisdom teeth at the back of the mouth. Removing wisdom teeth solely to prevent relapse is not supported by current clinical evidence. Wisdom teeth — formally known as third molars — are the last teeth to erupt, typically emerging between the ages of 17 and 25, though timing varies considerably. Most adults have four wisdom teeth, one in each corner of the mouth. Some people have fewer; a small percentage have none at all. Wisdom teeth are the most commonly impacted teeth in the human mouth. Impaction means the tooth cannot fully erupt into its correct position because it is blocked by the adjacent second molar, by bone, or by insufficient space in the jaw. Impacted wisdom teeth may erupt partially, remain entirely buried in bone, or lie at an angle. This question has been studied extensively, and the consensus is clear: wisdom teeth are not a significant cause of tooth crowding. Wondering what orthodontic treatment would involve for your teeth? A virtual assessment from a specialist orthodontist gives you a personalised view of your options and likely outcomes — before committing to a consultation. Start your free assessment → While wisdom teeth do not routinely need to be removed simply because a patient is having orthodontic treatment, there are specific clinical situations where extraction is appropriate: 17–25 Typical age range for wisdom tooth eruption — often overlapping with orthodontic treatment in teenagers and young adults No evidence That wisdom teeth cause anterior crowding — multiple systematic reviews have found no consistent causal relationship Retainer The most important factor in preventing relapse — far more influential than whether wisdom teeth are present There is no blanket recommendation to remove wisdom teeth before starting orthodontic treatment. The decision depends entirely on the clinical picture: It is very common for wisdom teeth to begin erupting while a patient is undergoing orthodontic treatment, particularly in teenagers and young adults. This does not automatically mean the wisdom teeth need to come out. Your orthodontist will monitor their position and eruption path through X-rays taken during treatment. In most cases, erupting wisdom teeth have no impact on the treatment outcome and no intervention is needed. If a wisdom tooth erupts into a position that could affect the bite or the stability of tooth movements already achieved, your orthodontist will discuss the clinical picture with you and recommend the appropriate next step — which may or may not be extraction. Important If your teeth have become crowded again after having braces — especially the lower front teeth — and your wisdom teeth are still present, it is tempting to conclude that the wisdom teeth are the cause. In most cases, the real explanation is inadequate retainer wear, natural mesial drift, or the continuation of jaw growth that was not yet complete when your treatment finished. Before pursuing wisdom tooth extraction as a solution to relapse, get an assessment from a specialist orthodontist who can identify the true cause and recommend the most appropriate management. Wondering About Your Orthodontic Options? A virtual assessment from a specialist orthodontist gives you a personalised view of your situation — including whether wisdom teeth are relevant to your specific case — before you commit to anything.What Are Wisdom Teeth?
Do Wisdom Teeth Cause Crowding?
When Do Wisdom Teeth Need to Come Out During Orthodontic Treatment?
Should Wisdom Teeth Be Removed Before Starting Braces?
What Happens If Your Wisdom Teeth Come Through During Treatment?
Wisdom Teeth and Orthodontics: Does Having Wisdom Teeth Affect Your Braces?
Published · 6 min read · by Virtual Consultant Online
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References
BOS clinical guidance on the relationship between wisdom teeth and orthodontic treatment, covering the evidence on wisdom teeth as a cause of anterior crowding, indications for wisdom tooth extraction during orthodontic treatment, and the current clinical consensus on routine pre-treatment extraction.
British Orthodontic Society — Wisdom teeth and orthodontic treatment: clinical guidanceNICE technology appraisal guidance on the indications for wisdom tooth extraction, covering the clinical evidence on pathological conditions that warrant extraction, the lack of evidence supporting routine extraction of symptom-free wisdom teeth, and the clinical criteria that should guide extraction decisions.
NICE — Guidance on the extraction of wisdom teethSystematic review of the clinical evidence on the relationship between third molar (wisdom tooth) eruption and lower anterior incisor crowding, including the results of controlled longitudinal studies comparing crowding progression in patients with and without wisdom teeth present, and the conclusion that third molars are not a reliable causal factor in late lower incisor crowding.
American Journal of Orthodontics and Dentofacial Orthopedics — Third molars and lower incisor crowding: a systematic reviewBOS clinical guidance on the relationship between wisdom teeth and orthodontic treatment, covering the evidence on wisdom teeth as a cause of anterior crowding, indications for wisdom tooth extraction during orthodontic treatment, and the current clinical consensus on routine pre-treatment extraction.
British Orthodontic Society — Wisdom teeth and orthodontic treatment: clinical guidanceNICE technology appraisal guidance on the indications for wisdom tooth extraction, covering the clinical evidence on pathological conditions that warrant extraction, the lack of evidence supporting routine extraction of symptom-free wisdom teeth, and the clinical criteria that should guide extraction decisions.
NICE — Guidance on the extraction of wisdom teethSystematic review of the clinical evidence on the relationship between third molar (wisdom tooth) eruption and lower anterior incisor crowding, including the results of controlled longitudinal studies comparing crowding progression in patients with and without wisdom teeth present, and the conclusion that third molars are not a reliable causal factor in late lower incisor crowding.
American Journal of Orthodontics and Dentofacial Orthopedics — Third molars and lower incisor crowding: a systematic review