Bruxism into three groups, namely central or pathophysiological factors, psychosocial factors and peripheral factors. The World Health Organization's International Classification of Diseases 10th revision does not have an entry called bruxism, instead listing "tooth grinding" under somatoform disorders. To describe bruxism as a purely somatoform disorder does not reflect the mainstream, modern view of this condition (see causes). The ICSD-R described three different severities of sleep bruxism, defining mild as occurring less than nightly, with no damage to teeth or psychosocial impairment; moderate as occurring nightly, with mild impairment of psychosocial functioning; and severe as occurring nightly, and with damage to
Habitual be the introduction, and subsequent loss of habitual "do (be)" in America, which was also the problem with the first expansion of the diffusion hypothesis. Another hypothesis for the origins of habitual "be" in NWBE and afterwards into AAE is the most logical and the strongest of the lot. The decreolization theory for the emergence of habitual "be" in AAE is the most likely and most supported of the theories of its origin. It involves the decreolization process of Caribbean English creole, with the loss of "does (be)", which itself is a decreolization of a previous creole habitual marker and its