When you sort the fields in a data list, you add a row at the top of the list that you define as the primary sorting level. The cells in this row contain numbers (from 1 to the number of the last field in the data list) that indicate the new order of the fields.
The temporomandibular joint is the joint of the jaw and is frequently referred to as TMJ. The TMJ is a bilateral synovial articulation between the mandible and temporal bone. The name of the joint is derived from the two bones which form the joint: the upper temporal bone which is part of the cranium (skull), and the lower jawbone or mandible.
The cause of TMJ disorders is not clear, but dentists believe it arises from problems with the muscles of the jaw or with the parts of the joint itself. Injury to the jaw, temporomandibular joint or muscles of the head and neck-such as from a heavy blow or whiplash-can cause TMJ disorders. Other possible causes include:1  Grinding or clenching the teeth, which puts a lot of pressure on the TMJ. 2  Dislocation of the soft cushion or disc between the ball and socket.njury to the jaw, temporomandibular joint or muscles of the head and neck-such as from a heavy blow or whiplash-can cause TMJ disorders.