The treatment of grinding teeth depends very much on it's cause. Following are several treatment options and tips to help prevent bruxism. Fill in the blank spaces with one of the words from the box and thus complete the sentences. Why do people grind their teeth? There are several causes leading to bruxism and both adults and children can experience it. Check out the different reasons why people clench their teeth. On the left hand side are the first parts of sentences, on the right are the end of the sentences. Please match the ones that complete a sentence.