A night guard is a dental device designed to protect teeth and jaws during sleep. It is a custom-made, removable appliance that fits over the upper or lower teeth. Night guards are primarily used to prevent teeth grinding (bruxism) and alleviate associated symptoms such as jaw pain, headaches, and tooth wear. They create a protective barrier between the upper and lower teeth, cushioning the impact of grinding and reducing stress on the jaw joints. Night guards are typically made from a comfortable and durable material, allowing for a snug fit and ensuring a restful night's sleep. Regular use of a night guard can help preserve dental health and alleviate bruxism-related discomfort.