The assumption that wisdom teeth always need to come out is one of the most common misconceptions in dentistry.
Some wisdom teeth erupt cleanly, cause no problems, and stay for life.
Others cause repeated pain, infection, damage to neighbouring teeth, or are positioned in a way that makes them impossible to clean properly.
The distinction matters, because removal is a surgical procedure with its own recovery and risks, and it is only worth doing when the likely benefit outweighs those risks.
What Are Wisdom Teeth?
Wisdom teeth are the third molars, the rearmost teeth in the upper and lower jaw.
Most people have four, though some have fewer or none.
Healthdirect Australia notes that wisdom teeth usually come through between the ages of 18 and 25, making them the last permanent teeth to emerge.
The problem is timing: by the time wisdom teeth arrive, the jaw is already fully developed, and there is often not enough room for them to erupt into a healthy position.
What Does It Mean When a Wisdom Tooth Is Impacted?
An impacted wisdom tooth is one that cannot emerge normally because bone, gum tissue, or an adjacent tooth is blocking its path.
Impacted teeth may stay fully buried beneath the gum, or they may partly emerge at an angle.
A partly erupted wisdom tooth creates a particular maintenance problem: a flap of gum tissue over the tooth traps food and bacteria in an area that is almost impossible to brush and floss properly.
This is why repeated infection around the back molars is one of the most common reasons we see patients about wisdom teeth.
Signs Worth Getting Checked
Some tenderness or pressure when a wisdom tooth is actively erupting is normal and temporary.
The following symptoms are different, and suggest a dental assessment is needed rather than watchful waiting.
- Persistent or recurring pain at the back of the jaw
- A red, swollen, or tender gum flap around the tooth
- Food getting trapped repeatedly behind the rear molars
- An unpleasant taste or bad breath that does not resolve with normal brushing
- Difficulty fully opening the mouth
- Swelling around the jaw or cheek
- Decay forming on the wisdom tooth itself, or on the second molar beside it
When swelling needs urgent attention
Increasing facial swelling, fever, or difficulty swallowing or breathing alongside wisdom tooth pain can indicate a spreading infection. If breathing or swallowing is affected, call 000 or go to the nearest emergency department immediately. For other urgent symptoms, call us for a same-day assessment.
How the Decision to Remove Is Made
Removal is not automatic, even when a wisdom tooth is symptomatic.
Your dentist will examine the gum, the condition of the tooth and the one beside it, the available space, and the number and pattern of previous infections.
A dental X-ray is almost always needed, because the angle of the roots and the depth of the tooth cannot be assessed by examination alone.
After that assessment, the options are: continue monitoring, proceed with removal at the clinic, or refer to an oral surgeon for more complex cases.
What Removal Involves
The approach depends on whether the tooth is fully erupted, partly erupted, or fully impacted.
| Scenario | Typical approach | Setting |
|---|---|---|
| Fully erupted, accessible tooth | Simple extraction under local anaesthetic | Dental clinic |
| Partly erupted or angled tooth | Surgical extraction, sometimes with sedation | Dental clinic or oral surgeon |
| Deeply impacted or complex roots | Surgical removal, may involve dividing the tooth into sections | Oral surgeon or hospital |
For a straightforward extraction, the area is numbed with local anaesthetic and the tooth is loosened and lifted from its socket.
For impacted teeth, the procedure may involve a small incision in the gum, removal of a small amount of bone, and dividing the tooth to bring it out in sections.
According to Healthdirect, upper wisdom teeth are often easier to remove than lower ones, and sedation may be offered when lower extractions are expected to be difficult.
Recovery: What to Expect Day by Day
Most people are back to normal activity within a week, though the socket itself can take two weeks to fully close over.
- First 24 hours: Bite firmly on gauze for 30 to 45 minutes to help clotting. Avoid rinsing, spitting forcefully, drinking through a straw, or smoking. These actions can dislodge the clot.
- Days 2 to 3: Swelling typically peaks then begins to ease. Ice packs on the outside of the face for the first 24 hours can help.
- Days 3 to 5: Soft foods only. Avoid anything requiring forceful chewing near the extraction site.
- Day 7 onwards: Gently rinse with warm salt water after meals to keep the socket clean. Most people can return to normal brushing around the area.
Complications to Watch For
Dry socket is the most common complication, affecting roughly 2 to 5 percent of extractions.
It happens when the blood clot that forms in the socket is dislodged or dissolves before the wound has healed, exposing the underlying bone to air, food and bacteria.
The key sign is a sharp increase in pain two to four days after the procedure, often radiating to the ear or jaw, sometimes with a visible empty socket and bad taste in the mouth.
Dry socket is treated at the clinic by cleaning and dressing the socket to protect the bone and allow healing to continue.
- Contact us if pain is worsening (not improving) from day 2 onward
- Contact us if you have heavy or persistent bleeding beyond the first hour
- Contact us if swelling is increasing after day 3, or if you develop a fever
- Go to hospital if you have difficulty opening your mouth, swallowing or breathing
For more information on our surgical services, see our wisdom teeth removal and dental surgery pages.