Why Upper Wisdom Teeth Behave Differently to Lower Ones

The mandible (lower jaw) is dense cortical bone. Lower wisdom teeth push against it, impacting against the second molar at angles that produce the throbbing, referred jaw pain most people picture. The upper jaw is anatomically different: the maxillary bone is lighter, the eruption path is less obstructed, and the roots often develop toward the floor of the maxillary sinus.

This means upper wisdom teeth can cause sinus pressure, post-nasal drip and repeated one-sided sinus infections without any obvious tooth pain at all. Patients come in describing months of sinus congestion on one side, sometimes already through a GP and ENT with no resolution. An OPG X-ray tells the story immediately. You can learn more about what an OPG shows in our OPG X-ray guide.

Signs That Your Top Wisdom Teeth Are the Problem

The eruption of upper wisdom teeth does not always produce textbook symptoms. Watch for these specifically:

• Cheek ulcers at the back of your mouth. An upper wisdom tooth angled buccally (outward) repeatedly traumatises the inside of your cheek. Patients mistake this for a persistent canker sore. It heals briefly, then returns because the tooth is still there.
• One-sided sinus pressure or congestion. The roots of upper wisdom teeth can sit within millimetres of the sinus floor. Pericoronitis (gum infection around a partially erupted tooth) or periapical infection can spread upward.
• Food packing between tooth 17 and the second molar. Even a fully erupted upper wisdom tooth creates a trap behind the second molar that is nearly impossible to clean. This is the leading pathway to decay on the distal (back) surface of the second molar a tooth worth keeping.
• The tooth nobody notices: hyper-eruption. If your lower wisdom tooth is absent or was removed, the upper wisdom tooth has no opposing surface to bite against. It slowly drifts down, beyond the occlusal plane, and can begin hitting the lower gum pad or destabilising your bite over years. This is a slow, silent process that patients don’t catch until a routine X-ray does.

Upper Wisdom Teeth Removal: What Makes It Different in Practice

Upper wisdom teeth removal is, in most cases, technically simpler than lower extractions. There is no inferior alveolar nerve running through the upper jaw, so the specific risk of permanent numbness to the lip and chin that comes with lower wisdom teeth does not apply. That said, upper wisdom teeth removal is not risk-free, and framing it as “the easy one” misses an important nuance.

The main consideration is sinus communication an opening between the tooth socket and the maxillary sinus. This is uncommon, occurs more often with teeth whose roots have grown into the sinus floor, and is usually managed well at the time of extraction with simple protocols. It is not an emergency, but it does require specific post-operative care: no nose-blowing, no straws, no smoking. Most cases close spontaneously within weeks.

At our oral surgery appointments, Dr. Kaur reviews the OPG and, where needed, a CBCT cone-beam scan before extraction to map exactly how close the roots are to the sinus floor. Patients who’ve been anxious about the procedure often comment afterward that it was over far faster than anticipated upper extractions done under local anaesthetic typically take five to fifteen minutes once the area is numb. For patients who experience dental anxiety, oral sedation or inhaled minimal sedation (happy gas) options are available to make the experience manageable.

When to Watch and When to Remove

Not every top wisdom tooth needs to come out. The Australian Dental Association’s guidance is consistent with the clinical evidence: a wisdom tooth that is fully erupted, properly positioned, not causing decay in adjacent teeth, and cleanable with normal brushing can be monitored rather than preemptively removed.

Remove or at least have a serious conversation about removing upper wisdom teeth when:

• There is recurrent pericoronitis (two or more episodes of infection around the tooth)
• The tooth is impacted and the follicle (tissue sac) around it is enlarging cyst formation risk
• There is existing decay on the upper wisdom tooth or its neighbour that cannot be reliably restored
• The tooth is hyper-erupting without an opposing lower tooth
• It is the source of recurring one-sided sinus symptoms confirmed by imaging
• Orthodontic treatment is planned and the tooth creates pressure on alignment

Monitor with 6–12 monthly X-rays when the tooth is fully erupted, asymptomatic, cleanable, and in good structural condition. The key phrase is “cleanable.” Most people cannot physically reach a wisdom tooth with a standard toothbrush without a specific technique. Our preventive dentistry team can show you the correct angulation and whether a single-tufted brush (often called an end-tuft brush) would help.

The Question We Hear Most at Our Canberra Practice

“My upper wisdom tooth doesn’t hurt do I still need to worry about it?”

Yes, sometimes. Absence of pain is not the same as absence of a problem. Upper wisdom teeth problems upper wisdom teeth removal decisions especially should be based on X-ray evidence, not just symptoms. A tooth can be silently decaying its neighbour, silently hyper-erupting, or silently seeding a low-grade sinus infection for years before it announces itself with pain. By that point, the second molar may already need a crown or root canal, which is a significantly more complex and expensive outcome than an earlier extraction would have been.

If your upper wisdom teeth have never been X-rayed, or if your last dental X-ray was more than two years ago, that is the starting point. A current OPG gives Dr. Kaur the full picture of all four wisdom teeth, sinus proximity, root morphology and adjacent tooth health in a single two-second exposure. For patients who’ve been putting this off, our online booking is the easiest next step.

What Recovery from Upper Wisdom Teeth Removal Actually Looks Like

Most patients are back to desk work within 24 to 48 hours. The first 24 hours involve some bleeding (expected), swelling that peaks on day two or three, and discomfort managed with ibuprofen and paracetamol alternated on a schedule the same protocol recommended by the Royal Australian College of General Practitioners for post-extraction pain. No prescription opioids are needed in the vast majority of upper wisdom tooth extractions.

Specific instructions for upper extractions: do not use straws, do not blow your nose forcefully, sleep with your head slightly elevated for the first two nights, and avoid the gym for 48 hours. These are the same instructions you’d receive after any extraction, with the addition of nose-blowing precautions given sinus proximity. If you develop a bad taste, increasing pain after day three, or can feel air moving between your mouth and nose when you breathe, contact us — these warrant same-day review. For any dental emergency that arises post-extraction, our emergency dentist line is available.

Frequently Asked Questions

Do upper wisdom teeth erupt before lower ones?

There is no universal rule, but upper wisdom teeth do tend to erupt with slightly less resistance than lower ones, and in some patients break through the gum earlier. Lower wisdom teeth are more frequently impacted and more likely to cause acute, obvious pain on eruption. Upper wisdom teeth eruption can go unnoticed for months.

Can a top wisdom tooth cause a sinus infection?

Yes. The roots of upper wisdom teeth often develop within millimetres of or sometimes within the maxillary sinus floor. An infected or abscessed upper wisdom tooth can introduce bacteria into the sinus, causing a dental sinus infection (odontogenic sinusitis) that presents exactly like a standard sinus infection and does not respond to antibiotics alone without addressing the tooth.

Is upper wisdom teeth removal covered by health insurance in Australia?

Removal of upper wisdom teeth falls under dental extras (major dental) in most Australian private health policies. The item number and rebate will vary by fund and level of cover. At Conder Dental Centre we provide a treatment plan with item numbers before any procedure so you can check your entitlements with your fund directly before committing.