The mandibular third molar impaction is said to be due to the inadequate space between the distal of the second mandibular molar and the anterior border of the ascending ramus of the mandible. 

Impacted wisdom teeth are still sometimes removed for orthodontic treatment, believing that they move the other teeth and cause crowding, though this is not held anymore as true.

Impacted wisdom teeth may suffer from tooth decay if oral hygiene becomes more difficult. Wisdom teeth which are partially erupted through the gum may also cause inflammation and infection in the surrounding gum tissues, termed pericoronitis.
 

How Serious is an Impacted Tooth?

Impacted teeth can be painful and lead to infection.They may also crowd or damage adjacent teeth or roots. More serious problems may occur if the sac surrounding the impacted tooth becomes filled with fluid and enlarges to form a cyst. 

As the cyst grows it may hollow out the jaw and permanently damage adjacent teeth, the surrounding bone and nerves. Rarely, if a cyst is not treated, a tumor may develop from its walls and a more serious surgical procedure may be required to remove it.

Despite the considerable concern regarding impacted third molars, a recent study found that third molars which have broken through the tissue and erupted into the mouth in a normal, upright position may be as prone to disease as those third molars that remain impacted.

What Happens During Surgery?

Before surgery, Doctor  will discuss with you what to expect. This is a good time to ask questions or express your concerns. It is especially important to let the doctor know about any illness you have and medications you are taking. 

The relative ease with which a wisdom tooth may be removed depends on several conditions, including the position of the tooth and root development. Impacted wisdom teeth may require a more involved surgical procedure. Most wisdom tooth extractions are performed in the office under local anesthesia, intravenous sedation or general anesthesia.

What Happens after Surgery?

Following surgery, you may experience some swelling and mild discomfort, which are part of the normal healing process. Cold compresses may help decrease the swelling, and medication prescribed by Doctor can help manage the discomfort. You may be instructed to modify your diet following surgery and later progress to more normal foods.