Why wisdom teeth sometimes need extracting
Wisdom teeth are evolutionary relics: our ancestors needed them to chew tough plant foods, but modern human jaws are often too narrow to accommodate them comfortably. The result? They can remain partially or fully impacted — unable to erupt correctly — and cause a cascade of problems.
Not all wisdom teeth are problematic. Some erupt properly aligned and remain perfectly functional for life. The issue arises when there is insufficient space, when the growth angle is incorrect, or when infection occurs.
When extraction is necessary: the main signals
Recurrent pain and infection (pericoronitis)
The most frequent complication of a partially erupted wisdom tooth is pericoronitis: an infection of the gum tissue (operculum) that covers the still-erupting tooth. Bacteria accumulate in the pocket between tooth and gum causing localised pain, swelling, bad breath and sometimes difficulty opening the mouth and fever.
If pericoronitis recurs more than once, extraction is almost always the solution — because the anatomical conditions that cause it won't change.
Pressure on adjacent teeth
An impacted wisdom tooth pushing against the second molar can cause resorption (gradual damage) of the root of the neighbouring tooth, pain referred along the jaw, and in the long term even loss of the adjacent tooth. Regular panoramic X-rays allow this to be identified before damage becomes irreversible.
Cysts and bone pathology
Around an impacted wisdom tooth, a dentigerous cyst can form — a fluid-filled sac that grows slowly and can damage surrounding bone and adjacent teeth. Cysts are often asymptomatic and are identified only on X-ray, which is why periodic check-ups are important even in the absence of pain.
Crowding and orthodontic needs
Wisdom teeth can push the dental arch and contribute to crowding of the front teeth, particularly in patients who have previously had orthodontic treatment. The relationship is debated in the literature, but in cases where space in the arch is critical — for example before or after orthodontic treatment — preventive extraction is often recommended.
How the extraction is performed
Wisdom tooth extraction takes place under local anaesthesia: the area is completely numb and you won't feel pain during the procedure, although you will perceive pressure and vibration. For fully erupted teeth the procedure is quick (a few minutes). For impacted teeth it may be necessary to incise the gum, remove a small amount of bone, and section the tooth to extract it in pieces.
For particularly complex cases or particularly anxious patients, sedation (conscious sedation or general anaesthesia) can be evaluated, making the procedure completely comfortable. If you have concerns about anxiety, read our article on managing dental fear.
Is your wisdom tooth giving you trouble?
Request an assessment visit and X-ray to evaluate the situation together.
Recovery: what to expect after extraction
Post-operative recovery for a simple wisdom tooth extraction takes 5–7 days. For complex impacted extractions, 7–14 days. The main symptoms in the first 48–72 hours:
- Swelling of the cheek — apply ice externally for 10-minute intervals in the first 24 hours
- Jaw ache — managed with prescribed anti-inflammatory medication
- Limited mouth opening — normal after more extensive surgery, resolves over days
- Slight bleeding — normal in the first few hours, controlled by biting on gauze
During recovery, prefer soft foods (soup, yoghurt, mashed foods), avoid smoking and alcohol, and do not rinse vigorously in the first 24 hours so as not to dislodge the blood clot that protects the wound.
Warning signs to watch out for
Contact the practice if you experience intense and worsening pain after 3–4 days (possible dry socket — alveolar osteitis), fever above 38°C, or swelling that increases rather than decreases after the third day.
Wisdom tooth and root canal treatment: two distinct options
Sometimes a painful wisdom tooth could be treated with root canal treatment (endodontics) rather than extraction. However, due to the complex anatomy of wisdom tooth roots and their often inaccessible position in the arch, endodontic treatment of wisdom teeth is technically demanding and is rarely the preferred option compared to extraction.
For other teeth, root canal treatment is absolutely the solution of choice to preserve a devitalised tooth. If you want to know more, read our article on root canal treatment: does it hurt?
Article written by Dr. Luigi di Bari, Dental Studio in Manfredonia (FG). Last updated: May 2026.
