Ursus (genus) Ursus is a genus in the family Ursidae (bears) that includes the widely distributed brown bears, the polar bear, and black bears. The name is derived from the Latin ursus, meaning bear. Species and subspecies of Ursus.
A dry socket is caused by the partial or total loss of a blood clot in the tooth socket after a tooth extraction. Normally, after a tooth is extracted, a blood clot will form as the first step in healing to cover and protect the underlying jawbone. If the blood clot is lost or does not form, the bone is exposed and healing is delayed. In general, a dry socket is a result of bacterial, chemical, mechanical, and physiologic factors.
Some people may be more likely to get dry socket after having a tooth pulled. That includes people who: 1  smoke. 2  have poor oral hygiene. 3  have wisdom teeth pulled. 4  have greater-than-usual trauma during the tooth extraction surgery. 5  use birth control pills. 6  have a history of dry socket after having teeth pulled.f you look into the site where the tooth was pulled, you'll probably see a dry-looking opening. Instead of a dark blood clot, there will just be whitish bone. The pain typically starts about 2 days after the tooth was pulled. Over time it becomes more severe and can radiate to your ear.