"Teeth Night Guard" is a company that provides custom-made dental mouthguards. It is mentioned in various reviews and articles, indicating its presence in the market. However, the effectiveness and value of their products may vary based on individual needs and experiences. It's always recommended to consult with a dental professional before making a decision. Please note that this information is based on available online sources and may not be fully up-to-date or comprehensive. For the most accurate information, it's best to visit the official "Teeth Night Guard" website or contact them directly.