Bite guards are coverings worn over teeth, and often used to protect teeth from injury during physical activity, and from tooth-on-tooth contact (grinding).
If you suffer from bruxism or teeth grinding problems, night mouth guards are the easiest solution for it. Bruxism is the proper term given to teeth grinding. It is the annoying practice of people making clenching sounds with their teeth as they sleep, either in the daytime or in the night.
If you have Tempero-Mandibular Joint problems, discuss this with your dentist. Bruxism can be a cause and a bruxism guard can help.