Bruxism bruxism), but also possibly grinding, and is often associated with other semivoluntary oral habits such as cheek biting, nail biting, chewing on a pen or pencil absent mindedly, or tongue thrusting (where the tongue is pushed against the front teeth forcefully). There is evidence that sleep bruxism is caused by mechanisms related to the central nervous system, involving sleep arousal and neurotransmitter abnormalities. Underlying these factors may be psychosocial factors including daytime stress which is disrupting peaceful sleep. Sleep bruxism is mainly characterized by "rhythmic masticatory muscle activity" (RMMA) at a frequency of about once per second, and also with
United Grinding North America are used in diverse industries such as the automotive industry and its suppliers, the tool industry, power plant turbine manufacture, tool and die makers, medical technology, machine tools, clock and watch manufacturers as well as the turbine industry. MÄGERLE, BLOHM and JUNG offer machines for surface grinding, the most common form of grinding that produces smooth finishes on flat surfaces and Machines, and profile grinding, the grinding of cylindrical work without traversing the wheel whose periphery is profiled to the form required and extends over the full length of the work. In Surface grinding, the grinding wheel revolves on a