Removing an impacted wisdom tooth is a surgical procedure that involves cutting into the gum, removing bone that covers the tooth, and often splitting the tooth into smaller pieces to extract it. The whole process typically takes 20 to 40 minutes per tooth, depending on how deeply the tooth is trapped and at what angle it sits. Here’s what actually happens at each stage.
Why Impacted Teeth Need Surgery
A wisdom tooth is “impacted” when it can’t fully break through the gum on its own, usually because there isn’t enough room in the jaw or because the tooth is angled the wrong way. Unlike a normal extraction where a dentist can grip a visible tooth and pull it out, an impacted tooth is partially or completely buried under gum tissue and bone. That means the surgeon has to go in and create a path to reach it.
There are four main types of impaction, and each one changes how involved the surgery will be. A vertically impacted tooth points in the right direction but is stuck beneath the gum. A mesial impaction, the most common type, means the tooth tilts forward toward the neighboring molar. A horizontal impaction means the tooth lies completely on its side within the jawbone. A distal impaction angles backward, away from the adjacent tooth. Horizontal impactions generally require the most bone removal and are the most surgically complex.
Before the Procedure Starts
If you’re receiving IV sedation or general anesthesia, you’ll need to stop eating and drinking at least eight hours before your appointment. That includes water, coffee, gum, and mints. You can brush your teeth the morning of surgery, but don’t swallow any water. If you take daily medications, let your surgical team know beforehand so they can tell you which ones to continue and which to pause.
Once you’re in the chair, your surgeon will numb the area with a local anesthetic. Many patients also receive some form of sedation, ranging from nitrous oxide (laughing gas) to IV sedation that puts you in a twilight state where you’re technically conscious but unlikely to remember anything. For more complex cases or anxious patients, full general anesthesia is an option. Your surgeon will recommend a sedation level based on how difficult the extraction looks and your comfort level.
Step 1: Opening the Gum Tissue
The surgeon begins by making an incision along the gum line over the impacted tooth. Using a specialized instrument called a periosteal elevator, they peel the gum tissue back and fold it away from the bone, creating a flap. This flap needs to be large enough to give clear visibility and room to work. If the tooth is only partially impacted, part of the crown may already be visible once the flap is raised.
Step 2: Removing Bone
If the tooth is still hidden beneath bone after the gum flap is lifted, the surgeon uses a surgical drill with a small round or tapered bur to carefully remove the bone covering the tooth. The goal is to expose the crown and create a narrow trough around it, roughly down to where the crown meets the root. This gives the surgeon enough space to work instruments around the tooth and lever it free. Bone removal can also be done with chisels or, in some practices, with a piezoelectric device that uses ultrasonic vibrations to cut bone precisely while minimizing damage to soft tissue.
The amount of bone that needs to come out depends entirely on the type of impaction. A vertically impacted tooth sitting just below the surface may need very little bone removal. A horizontally impacted tooth buried deep in the jaw may require significantly more.
Step 3: Sectioning and Removing the Tooth
Once enough bone has been cleared, the surgeon uses an elevator (a lever-like instrument) to try loosening the tooth from its socket. If the tooth shifts, they can work it free and lift it out, sometimes finishing with forceps.
Often, though, the tooth won’t budge in one piece. This is especially common with horizontally or mesially angled teeth, where the roots hook in different directions or the angle makes it impossible to pull the whole tooth through the opening. In these cases, the surgeon uses a surgical bur to cut the tooth into two or more sections. The crown might be separated from the roots, or the roots split apart from each other. Each piece is then removed individually, which requires far less force and a smaller opening than trying to extract the tooth whole.
For teeth positioned very close to the nerve that runs through the lower jaw, some surgeons perform a technique called coronectomy. Instead of removing the entire tooth, they cut off the crown about 3 to 4 millimeters below where it meets the root and leave the roots in place. This avoids the risk of dragging roots across the nerve.
Step 4: Cleaning and Closing
After the tooth is out, the surgeon irrigates the empty socket with saline to flush away bone fragments, tooth debris, and bacteria. They carefully inspect the site for any remaining pieces of tooth, signs of nerve exposure, perforation of the sinus (for upper wisdom teeth), or damage to the thin plate of bone on the tongue side of the jaw.
If everything looks clean, the gum flap is folded back into place and stitched closed. Some surgeons leave the wound partially open to heal on its own. Research hasn’t shown a clear advantage of one approach over the other in terms of infection risk or dry socket rates, so the decision often comes down to surgeon preference and the specifics of your case. The stitches are usually dissolvable and disappear on their own within a week or two.
What Recovery Looks Like
Most people can return to work or school within three to five days, though full healing of the extraction site takes about two weeks. Swelling and pain tend to peak around the third or fourth day, then steadily improve. If pain or swelling starts getting worse again after day four, that’s a sign something may be off and worth contacting your surgeon about.
For the first three to five days, stick to soft foods like yogurt, mashed potatoes, and smoothies, then gradually reintroduce solid foods as you feel comfortable. Avoid swishing liquid around your mouth, drinking through a straw, or having carbonated or alcoholic drinks for at least five days. All of these can dislodge the blood clot forming in the socket, which is your body’s first step in healing the wound.
Risks Worth Knowing About
The most common complication is dry socket, which happens when that blood clot either never forms properly or gets dislodged, leaving the underlying bone exposed. It’s painful and delays healing. After surgical extractions, dry socket occurs in roughly 12 to 15% of cases, significantly higher than the 1 to 2% rate seen with simple extractions. Smoking is one of the biggest risk factors.
Nerve injury is the complication people worry about most. The inferior alveolar nerve runs through the lower jaw directly beneath where lower wisdom teeth sit, and it controls sensation in your lower lip, chin, and gums. Temporary numbness or tingling after surgery occurs in roughly 1 to 8% of lower wisdom tooth extractions. In most cases, normal sensation returns within six months. Permanent nerve damage, defined as numbness lasting longer than six months, happens in less than 1% of cases. The risk increases when the tooth roots are visibly close to or wrapped around the nerve canal on X-rays, which is one reason your surgeon takes imaging beforehand.
Other possible complications include infection at the surgical site, prolonged bleeding, and, for upper wisdom teeth, a small opening between the mouth and the sinus cavity. These are uncommon and generally manageable when caught early.
Do All Impacted Wisdom Teeth Need Removal?
Not always, and this is an area where dental professionals genuinely disagree. If an impacted wisdom tooth is causing pain, infection, cysts, damage to neighboring teeth, or gum disease, extraction is clearly warranted. The debate centers on impacted teeth that aren’t currently causing problems.
Oral surgeons generally lean toward removing asymptomatic impacted wisdom teeth to prevent future complications like infection during pregnancy, cyst formation, or decay in the adjacent molar. Orthodontists tend to be more conservative, preferring to monitor with regular X-rays and only extract when symptoms or clear risks develop. If your impacted wisdom teeth aren’t being removed right away, periodic imaging to track any changes in their position or the health of surrounding tissue is standard practice.