Why do wisdom teeth need to be removed?

Medically Reviewed by Dr. Robert Bagoff on September 9, 2026

Wisdom teeth need to be removed when they are impacted, crowd neighboring teeth, or create pockets where bacteria can cause infection, gum disease, or decay that is difficult to reach with normal brushing. Because these third molars erupt last, usually in the late teens or early twenties, there is often not enough room left in the jaw for them to come in properly, which is why removal is so common rather than the exception.

At Bagoff Dental Arts in West Orange, we evaluate wisdom teeth well before they become a problem, so patients and families can plan removal on their own timeline rather than in the middle of a dental emergency. Here is what actually determines whether a wisdom tooth needs to come out, and what the process generally looks like.

Why We Still Have Wisdom Teeth

Wisdom teeth, or third molars, are believed to be a holdover from a diet that once relied heavily on rough, fibrous foods like roots, raw meat, and leaves, all of which demanded far more chewing surface and jaw strength than a modern diet requires. As human diets became softer and easier to chew, jaws gradually grew smaller over generations, but the wisdom teeth themselves did not disappear at the same pace. The result is a set of molars that, for most people today, simply do not have enough room to erupt properly.

Impacted vs. Partially Impacted Wisdom Teeth

A fully impacted wisdom tooth is one that stays completely trapped beneath the gum tissue because the jaw does not have enough space for it to break through. Because bacteria, food debris, and other material can become lodged around a tooth that is covered but not fully erupted, impacted wisdom teeth are prone to a painful infection of the surrounding gum tissue known as pericoronitis, and they can also form cysts that damage nearby tooth roots or bone if left untreated. A partially impacted wisdom tooth has broken through the gum but has not fully emerged, which creates its own set of problems. According to Mayo Clinic, because the back of the mouth is hard to see and clean, a partially erupted wisdom tooth can create a pathway for bacteria to reach the gums, leading to infection and cavities that cannot always be treated with a simple filling.

Other Reasons Wisdom Teeth Get Removed

Beyond impaction, several other situations commonly point toward removal, including persistent pain at or around the wisdom tooth site, repeated infections, active gum disease near the molar, extensive tooth decay that cannot be adequately treated with a filling, and cysts or tumors that develop around an unerupted tooth. Crowding is another common factor. A wisdom tooth pushing against the molar in front of it can gradually shift an entire row of teeth out of alignment, undoing years of orthodontic work in some cases.

Why the Late Teens and Early Twenties Are the Ideal Age

Timing matters more than many patients realize. Removal tends to be simpler, with an easier recovery, when performed in the late teen to early twenty-something years rather than later in life. At that age, the roots of the wisdom teeth are typically not yet fully formed and the surrounding jawbone is less dense, which generally means a shorter procedure and a faster healing period. Waiting until later in life, once the roots have fully developed and the bone has hardened further, tends to make the same extraction more involved and the recovery longer.

What Wisdom Tooth Removal Generally Involves

Removal is typically performed by a dentist or an oral surgeon, depending on how the teeth are positioned and how complex the extraction is expected to be. The area is numbed with a local anesthetic, and for more involved impactions, sedation options are often available to keep the patient comfortable throughout. After the tooth is removed, most patients manage swelling with ice packs for the first day or two, stick to soft foods while the extraction site heals, and avoid strenuous activity, straws, and smoking, all of which can disrupt healing. Most people recover within a few days to about a week, though healing time varies depending on how impacted the tooth was.

How Bagoff Dental Arts Can Help

Deciding whether a wisdom tooth needs to come out is not always straightforward, and it depends on the tooth’s exact position, how it is developing, and your overall dental health rather than age alone. We evaluate wisdom teeth using imaging that shows exactly how each tooth is angled and how much room is available before recommending removal, so patients understand the reasoning behind the recommendation rather than being told simply to trust us. For patients who prefer to plan around a school or work schedule, our summer break timing guide covers how students in particular can plan the recovery window around their calendar.

Dr. Robert Bagoff and our team take the time to walk every patient through their X-rays and explain exactly what we are seeing before recommending a course of action, rather than treating wisdom tooth removal as an automatic step for every patient. You can learn more about our providers on our meet the doctors page, and we work with families to plan removal at a time that fits their schedule whenever the situation allows for it.

If you are unsure whether your wisdom teeth need attention, or if you have started noticing pain, swelling, or pressure at the back of your mouth, our emergency dentist team is also available for anything that cannot wait. New patients can review our new patient information before their first visit, and everyone else can reach out through our contact form to schedule an evaluation.

Frequently Asked Questions About Wisdom Teeth Removal