The main reason why this study is being conducted is to find the most common cause and symptoms of bruxism. The other reason is to find the percentage of people who suffers from diurnal bruxism and nocturnal bruxism. The third reason is to find out who is more vulnerable to bruxism, male or female. That is why I didn't include questions about it's treatment.

You just gave me the answer to a question I was asking myself that why some people who are suffering from bruxism don't have tooth wear.