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.
If you develop dry socket, the pain usually begins three to four days after your tooth is removed. Normally, a blood clot forms at the site of a tooth extraction. This blood clot serves as a protective layer over the underlying bone and nerve endings in the empty tooth socket.The clot also provides the foundation for the growth of new bone and for the development of soft tissue over the clot.ry socket occurs when the blood clot at the site of the tooth extraction has been dislodged or has dissolved before the wound has healed.