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Wisdom Tooth Removal: What Is a Dry Socket?

After a wisdom tooth has been extracted, the socket is filled with a blood clot. Slowly, the clot shrinks and fills in. That is, a skin or a covering with tissue similar to the rest of the mouth (mucous membrane) begins to cover the clot and the tissue in the clot area is ingrown by bone cells and tissue cells. Eventually, the area shrinks and the socket is eliminated and replaced by firm tissue, and the depth of the socket fills with bone. The healed area usually is narrower than the site of the original wisdom tooth.

The pain following a wisdom tooth extraction usually lasts no more than a day or two, at the most. If the clot breaks down or is washed away, the protective covering of the exposed bone is lost and the bone can be exposed to the mouth bacteria. This painful condition is known as dry socket. One of the features of its presence is that wisdom tooth post-extraction pain persists longer than a couple of days and can be quite severe.

Though the causes are not known with certainty, some factors seem to predispose individuals towards a dry socket:

• those people who have gingivitis or periodontal disease.
• those who have had lower or mandibular extractions, particularly on posterior (back) teeth such as molars and pre-molars.
• those who have wisdom teeth that are difficult to extract and necessitate bone removal.
• those that are particularly difficult to numb and so need several cartridges of local anesthetic. Some local anesthetics contain epinephrine, which is used in preventing rapid dissipation of the anesthetic by constricting the blood vessels at the site. This perhaps may prevent good clot formation. People who smoke also are predisposed towards dry socket. Again, this may be because of the constricting effect of nicotine and tar products on the blood vessels.

Rinsing the mouth within a few hours of a wisdom tooth extraction may flush the clot out of the socket. Using a straw may have a similar effect. That is why post-operative instructions urge the patient not to smoke, rinse or use a straw for at least a day.

Unfortunately, there is no sure way of guaranteeing that a dry socket won't occur, but there is some evidence that placing a small piece (quarter of a square inch) of gel foam (a clotting agent) covered with tetracycline powder (an antibiotic) in the socket after the extraction can reduce the chance of a dry socket. This will be absorbed over a few days and has not been shown to induce allergies or have any other effect on the patient. Fortunately, dry socket is a relatively easy condition to treat.

by Myer Leonard, DDS, MD

+Jim Du Molin is a leading Internet search expert helping individuals and families connect with the right dentist in their area. Visit his author page.

Wisdom Tooth Development: Will They Fit in Your Mouth?

Wisdom tooth pain sometimes accompanies the development of these teeth, but not always. Some people's wisdom teeth fit comfortably in their mouths, while other people just don't have room for extra teeth.

Wisdom teeth are the third molars, and they are the last teeth to come in, usually during a person's late teens. Around this time, a dentist should do a dental exam and also take x-rays. The wisdom tooth dentist can then suggest the best course.

If the molars are coming in straight, there's room for them, and the patient is not experiencing any pain or discomfort, then the dentist will likely recommend a wait-and-see approach, conducting regular exams to ensure no problems are developing.

But if the teeth aren't coming in straight, if they're butting up against other teeth, if there's not enough space for them, if the patient is experiencing mouth or tooth pain -- then the dentist will suggest wisdom tooth removal.

Highly impacted teeth may require fairly intense wisdom tooth surgery. The older a person is, the more difficult this procedure will be, so it's not a good idea to postpone treating tooth impaction.

But wisdom tooth extraction can be relatively quick and easy for most other patients. In addition, some patients may not need all four teeth removed. Some people don't even develop all four molars.

+Jim Du Molin is a leading Internet search expert helping individuals and families connect with the right dentist in their area. Visit his author page.