A dental night guard is a custom-made oral appliance designed to protect teeth from grinding or clenching during sleep, a condition known as bruxism. It acts as a cushion between the upper and lower teeth, reducing wear and tear, and alleviating jaw pain. These guards are typically made from durable materials like thermoplastic and can be fitted by a dentist for optimal comfort and effectiveness. Wearing a night guard can help improve sleep quality and prevent dental issues, making it a valuable tool for those who experience nighttime teeth grinding.