Bruxism is excessive grinding of the teeth and/or excessive clenching of the jaw. Bruxism is a parafunctional activity; it is not an activity related to normal function such as eating or talking. Bruxism is a common problem, it may cause minimal symptoms and therefore people may not be aware of the condition. Several symptoms commonly associated with bruxism, including hypersensitive teeth, aching jaw muscles, and headaches. Bruxism may also cause tooth wear, and may even cause teeth to break and dental restorations to be repeatedly lost or damaged. There are a variety of different splints that can be effective in treating bruxism issues.