You cannot prevent wisdom teeth from forming. Whether you develop them is determined almost entirely by genetics, not by anything you eat, do, or avoid during childhood. However, you can take steps to prevent the problems wisdom teeth commonly cause, including impaction, infection, and damage to neighboring teeth. That distinction matters, because most of the pain and expense people associate with wisdom teeth comes from complications, not the teeth themselves.
Why You Can’t Stop Them From Growing
Wisdom teeth, also called third molars, begin developing deep in the jawbone years before they push through the gums. A twin study published in Scientific Reports found that whether someone is born without one or more wisdom teeth is 62 to 83 percent determined by genetics, depending on the jaw. For lower wisdom teeth, additive genetic factors accounted for over 80 percent of the variation. Environmental factors played a relatively small role.
About 37 percent of people are naturally missing at least one wisdom tooth, a condition called agenesis. If your parents or siblings never developed all four, you have a higher chance of being in that group. But there’s no medication, supplement, or dietary change that can stop a wisdom tooth from forming once your genes have set it in motion. The earliest signs of development, tiny crypts in the bone, can appear on X-rays as young as age 6 or 7.
The Jaw Size Problem
Even when wisdom teeth form normally, problems arise because modern human jaws are often too small to accommodate them. Research in animals and humans consistently shows that softer diets reduce the chewing forces that stimulate jaw growth during childhood. Softer food leads to smaller lower jaws, lower bone mass, and thinner cartilage at the jaw joint in growing animals. Some researchers have suggested that the shift toward processed, softer foods over thousands of years has gradually shrunk human jaws while the number of teeth stayed the same.
This mismatch is why impaction is so common. When there isn’t enough room, a wisdom tooth can come in at an angle, press against the tooth in front of it, or stay trapped beneath the gum entirely. In one large population study, 68 percent of people with wisdom teeth had at least one impacted. The tooth might angle forward toward the neighboring molar, tilt backward, come in straight but remain stuck below the gumline, or even lie completely on its side.
Early Screening and Monitoring
The most practical thing you can do is catch problems early. Dentists typically take a panoramic X-ray during the mid-teen years to check whether wisdom teeth are developing, how they’re positioned, and whether the jaw has room for them. Since these teeth usually emerge between ages 17 and 25, early imaging gives you and your dentist time to plan rather than react to an emergency.
If the X-ray shows a tooth angled sharply toward the neighboring molar or lying horizontally, that tooth is unlikely to erupt properly on its own. Knowing this early means you can schedule removal at a younger age, when the roots are shorter, the bone is softer, and recovery is faster. Waiting until your 30s or later increases the risk of complications during surgery and can allow the impacted tooth to damage the roots or enamel of the second molar next to it.
When Removal Is Recommended
Current clinical guidelines do not recommend pulling wisdom teeth that are fully buried in the bone, symptom-free, and showing no signs of disease on X-ray. Leaving them in place and monitoring them over time is considered a better approach than automatic extraction, because it avoids unnecessary surgery, recovery time, and cost.
That said, monitoring means genuinely monitoring. Asymptomatic impacted wisdom teeth still need lifelong follow-up with periodic X-rays, because cysts, decay, and gum disease can develop silently around a buried tooth at any age. Guidelines recommend the highest level of evidence for this ongoing surveillance.
Proactive removal is recommended in specific situations. Wisdom teeth that are horizontally positioned or steeply angled forward should generally be removed between ages 25 and 30 to prevent periodontal damage to the second molar. Partially erupted teeth in those same angled positions carry a higher risk of causing cavities on the back surface of the neighboring tooth. And patients who are at elevated risk for repeated gum infections or who face upcoming medical treatments that would make future surgery riskier are also candidates for earlier extraction.
Preventing Infection Around Erupting Teeth
One of the most common wisdom tooth complications is pericoronitis, an infection of the gum tissue that partially covers an erupting tooth. Food and bacteria get trapped under that flap of tissue, and because it’s so far back in the mouth, normal brushing often misses it entirely. The result is swelling, pain, difficulty opening your mouth, and sometimes fever.
Good oral hygiene is the single most effective way to prevent this. That means brushing the very back of your mouth deliberately, even when the area is tender, and using floss or an interdental brush to clean around the emerging tooth. An antimicrobial mouth rinse can help reduce the bacterial load in that hard-to-reach zone. If you notice a flap of gum tissue sitting over a partially erupted wisdom tooth, gently rinsing the space beneath it with warm salt water or a syringe of clean water can flush out trapped debris before infection sets in.
If pericoronitis does develop, early treatment involves irrigating the pocket with sterile solutions and mechanically cleaning it. Mild cases often resolve without antibiotics, but repeated episodes of infection in the same spot are a strong signal that the tooth should come out.
What Actually Helps Long Term
Since you can’t control whether wisdom teeth form, the realistic prevention strategy focuses on three things: getting screened with imaging in your mid-teens, keeping partially erupted teeth meticulously clean, and following up with regular dental visits so that problems are caught while they’re small. A tooth that looks fine at 18 can develop a cyst or erode its neighbor by 30, so “no symptoms right now” is not the same as “no risk ever.”
For parents wondering about younger children, there’s no intervention during childhood, whether dietary changes, jaw exercises, or orthodontic devices, that has been proven to prevent wisdom teeth from forming or guarantee they’ll have enough room. The most useful thing you can do is ensure your child gets a panoramic X-ray at the age your dentist recommends, so the conversation about what to do starts with good information rather than a sudden toothache.