Many people assume an impacted wisdom tooth has to come out. That is not always so. A wisdom tooth that is stuck but healthy, easy to keep clean and causing no harm can often be watched instead, while one that keeps getting infected, decays or damages the tooth in front is usually better removed.
Why wisdom teeth get stuck
Wisdom teeth, the third molars, are the last teeth to form and usually try to come through in the late teens or twenties. By then there is often too little room at the back of the jaw. The tooth may lean forwards into the molar in front, lie on its side, or stay covered by gum or bone. Lower wisdom teeth are affected more often than upper ones.
How a tooth is impacted matters more than the fact that it is. A tooth that is completely covered by bone may never cause a problem. A tooth that has broken partly through the gum is more likely to, because the flap of gum over it traps food and bacteria where a toothbrush struggles to reach.
Signs that it is causing trouble
Plenty of impacted wisdom teeth produce no symptoms at all and are only seen on an X-ray. When there is a problem, people often notice:
- pain or pressure at the very back of the jaw, sometimes spreading to the ear
- red, puffy gum over a partly erupted tooth
- a bad taste or smell from that area
- soreness or stiffness when opening wide
- food packing behind the last molar
An infection of the gum flap is called pericoronitis, and repeated episodes are one of the most common reasons removal is advised. Our article on pericoronitis explains it in detail. Swelling that spreads into the face or neck, fever, or difficulty swallowing or breathing needs urgent care.
Damage you may not feel
Some problems develop quietly. A lower wisdom tooth that leans forwards against the second molar creates a trap that is very hard to clean. A 2025 meta-analysis in Clinical Oral Investigations (Revuelta-Cortés and colleagues) found decay on the back surface of about 30% of second molars sitting next to an impacted lower wisdom tooth, and about 43% where the wisdom tooth was tilted forwards (mesioangular). Cysts around a buried tooth and gum disease around the neighbouring molar are other reasons a dentist may recommend action even without pain.
What the evidence says about healthy, symptom-free teeth
For impacted wisdom teeth that are causing no symptoms and show no disease, the research does not give a clear answer. A 2020 Cochrane review (Ghaeminia and colleagues) found only two studies and concluded that there is not enough evidence to say whether these teeth should be removed or kept. It noted that keeping them may be linked to a higher long-term risk of gum disease around the second molar, but that evidence was very low certainty.
In practice this means the decision is made tooth by tooth. A healthy wisdom tooth that can be cleaned is often monitored with regular check-ups and X-rays. A tooth showing early signs of trouble, or one in a position known to cause problems, may be better dealt with before problems develop further.
When the nerve is close
The roots of lower wisdom teeth can sit very near the nerve that supplies feeling to the lower lip and chin. When a 3D scan shows a root lying against the nerve, a coronectomy may be an option for suitable cases. The crown of the tooth is removed and the roots are deliberately left in place, away from the nerve. A 2024 meta-analysis in the Journal of Oral and Maxillofacial Surgery (Peixoto and colleagues) found coronectomy was associated with a lower risk of nerve injury than full removal, although a second procedure was more often needed later, for example if a root moved towards the surface.
Lumi Dental offers coronectomy for suitable cases. Some complex cases are still referred to an oral surgeon.
If it does need to come out
Most wisdom teeth are removed under local anaesthetic. A tooth under the gum or bone may need a small surgical procedure, and sedation can help people who are anxious. Lumi offers happy gas, inhaled pain relief, oral sedation and IV sedation. Swelling and stiffness usually peak in the first few days, and our wisdom teeth recovery timeline walks through what to expect. Our wisdom teeth removal guide covers the procedure itself. As a typical market range, not a Lumi fee, a simple extraction often costs about $200 to $350 and a surgical extraction about $400 to $900 per tooth.
Common questions
Can I tell if my wisdom tooth is impacted without an X-ray?
Not reliably. A tooth you cannot see may be buried, missing or still forming. An examination and X-ray, sometimes a 3D scan, show its position.
Will a wisdom tooth that hurts on and off settle by itself?
A flare of gum infection may settle with cleaning and care, but if it keeps coming back, the cause is usually still there. See a dentist to check what is going on.
Is there a best age to have them out?
Age on its own is not usually a reason to remove a healthy tooth. The position of the tooth and any signs of disease matter more.
If a wisdom tooth is bothering you, or you would like to know if yours should be watched or removed, our dentists in Melrose Park can examine it and take the right images. See current options on our current deals page or book with a general dentist.
This article is general information and is not a substitute for personal dental advice. For advice about your own teeth, please see a dentist.
