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
The Grinding Wheel has received generally positive reviews from critics. Blabbermouth.net writer Ray Van Horn Jr. gave the album a rating of nine-and-a-half out of ten, and said, "If you think Overkill expended its tanks producing output with such astonishing velocity, you don't know this band very well. For its eighteenth album, "The Grinding Wheel", Overkill does the unthinkable: it outdoes itself. Consider that some fans dropped off after 1991's "Horrorscope", which is those poor saps' folly. For the diehard wrecking crew, "The Grinding Wheel" is going to be a gift to cling to throughout 2017." He finished his review, saying that the