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An impacted tooth is a tooth that gets blocked as it is pushing through the gum into your mouth (erupting). Wisdom teeth often are impacted.
Wisdom teeth usually begin to come in between the ages of 17 and 21. Dentists call these teeth third molars. They may become impacted because there’s not enough room in your mouth for them. A wisdom tooth also might be trying to come in sideways. Or, it might be tilted in your jaw.
An impacted tooth can be painless. You may not even realize it’s there. However, when an impacted wisdom tooth tries to come in, the flap of gum on top of it can become infected and swollen. This can hurt. You might even feel pain in nearby teeth, or in the ear on that side of your face.
An impacted tooth can lead to an infection called pericoronitis. If untreated, this infection can spread to the throat or into the neck. Severe infections require a hospital stay and surgery.
Impacted teeth also can get cavities. An impacted tooth can push on the neighboring molar. This can lead to tooth movement, decay or gum disease. It also can change the way your teeth come together. Rarely, impacted teeth can cause cysts or other growths in the jaw.
Pain can occur for several days and then disappear. It can come back weeks or months later.
You can sometimes relieve minor irritation by rinsing with warm salt water (1/2 teaspoon of salt in 8 ounces of water). Over-the-counter pain relievers also may help.
If the tooth continues to cause pain, is infected or interferes with nearby teeth, the usual treatment is to take it out. Extracting one tooth can take 5 to 30 minutes, depending on where it is. In some cases, an infection requires antibiotics.
Patients are often referred to an oral and maxillofacial surgeon to have an impacted tooth removed. Before removing the tooth, your dentist or surgeon will discuss the procedure and the type of anesthesia and sedatives he or she will use. You will not be able to eat for six hours before surgery. If you take any medicines, keep on schedule with them. Someone should drive you to the appointment and drive you home.
After the surgery you may have swelling of the cheeks and jaw. It may be hard to eat certain foods. Follow your dentist’s or surgeon’s instructions carefully for the best recovery. Complications of surgery are rare, but do occur.
An impacted tooth may not bother you or affect nearby teeth. In this case, you won’t need immediate treatment. However, your dentist probably will recommend that the tooth be taken out to avoid future problems.
Many people have all four of their wisdom teeth taken out at once. Sometimes this surgery is done before the teeth have started coming in. This prevents future problems. This usually is done in an oral and maxillofacial surgeon’s office with sedation and local anesthesia. Often, it is better to have your wisdom teeth taken out before you turn 21. The surgery usually is less complicated. The tissue and bone also heal better.