Wisdom Teeth: When They Need to Come Out, and When They Do Not

Somewhere around the late teens or early twenties, most people are told they have wisdom teeth coming in and that something will probably need to be done about them. That conversation is often short on detail, which leaves a lot of families unsure whether removal is genuinely necessary or simply the default recommendation. The honest answer is that it depends on the individual mouth, and there are real cases in both directions.

What Wisdom Teeth Actually Are

Wisdom teeth are the third molars, the last set of teeth to develop, sitting at the very back of the upper and lower jaws. They typically begin to emerge between ages 17 and 25. Most people develop four of them, but it is entirely normal to have three, two, one, or none at all. Missing wisdom teeth are a common anatomical variation, not a problem.

The difficulty is one of space. Human jaws have gradually become smaller over evolutionary time while the number of teeth has stayed the same. When there is not enough room at the back of the arch, the third molar cannot erupt cleanly into position. It may come in at an angle, emerge only partway, or stay fully buried in the bone. That situation is called impaction, and it is what drives most removal decisions.

When Removal Is Usually Recommended

Recurring infection around a partly erupted tooth. When a wisdom tooth breaks through the gum only partway, it creates a flap of tissue that traps food and bacteria and cannot be cleaned properly. The resulting infection, called pericoronitis, causes swelling, pain, and sometimes difficulty opening the jaw. It tends to recur, and each episode is more disruptive than the last. Removal is usually the reliable fix.

Decay that cannot be restored. Wisdom teeth sit so far back that many people simply cannot brush or floss them well. A cavity in a third molar is often difficult to access and restore predictably, so extraction is frequently the more sensible option compared with a filling that may not last.

Damage to the neighbouring molar. An angled wisdom tooth can press against the second molar, causing decay or bone loss on the surface where the two meet. This is one of the more compelling reasons to act, because the tooth being damaged is one you genuinely need.

Cysts or bone changes. The sac of tissue around an unerupted tooth can occasionally develop into a cyst that expands and damages surrounding bone. This is uncommon, but it is one of the things X-rays are checking for.

Persistent gum disease in that area. Deep pockets behind the last molar that will not respond to cleaning often improve once the wisdom tooth is out.

When Leaving Them Alone Is Reasonable

Plenty of wisdom teeth never cause trouble. If a third molar has erupted fully, sits in a normal position, has a tooth to bite against, and can be cleaned like any other molar, there is generally no reason to remove it. A healthy functioning tooth is worth keeping.

Fully buried teeth with no signs of infection, decay, or pressure on neighbouring roots can often be monitored rather than removed. In these cases the approach is periodic X-rays at routine checkups to confirm nothing is changing. If the picture stays stable, nothing needs to happen. This watchful approach is a legitimate clinical choice, not a delay tactic.

Why Timing Matters

When removal is clearly indicated, doing it in the late teens or early twenties tends to be more straightforward. The roots are not yet fully formed, the surrounding bone is less dense, and healing is generally faster. That said, extraction at 40 or 55 is entirely routine when there is a good reason for it. Age alone is not a barrier, it simply changes the expected recovery a little.

What the Procedure Involves

Straightforward extractions are done with local anaesthetic in a single appointment. The area is fully numbed, and while you will feel pressure and movement, you should not feel pain. More complex impactions may involve a small incision in the gum and sometimes removing a little bone to free the tooth. Dissolvable stitches are common.

If the idea of the appointment is the hardest part, that is worth mentioning ahead of time. Sedation options including nitrous oxide and oral sedation are available and make a meaningful difference for anxious patients. Our oral surgery page outlines what we handle in the office and when we would refer to a specialist, which we do when a case calls for it.

Recovery, Realistically

Expect swelling that peaks around day two or three and then steadily improves. Most people take two to three days off strenuous activity and are largely back to normal within a week. Soft foods, cold compresses on the first day, and the pain relief your dentist recommends will cover most of it.

The main thing to avoid is disturbing the blood clot in the socket during the first few days. That means no smoking, no drinking through a straw, and no vigorous rinsing. A dislodged clot leads to dry socket, which is painful but very treatable, so call the office rather than waiting it out. If you are unsure whether what you are feeling is normal, our guide to emergency dental care in Courtenay covers when to get in touch right away.

The Short Version

Wisdom teeth are not automatically a problem, and blanket removal is not the standard of care. What matters is what your particular teeth are doing: whether they can be cleaned, whether they are affecting the molar in front, and whether they are causing repeated infection. An exam and an X-ray answer those questions, and from there the recommendation should come with reasons attached.