The O-shape cheek retractor makes it easy to keep the mouth open and hands available for oral inspection and treatment. It’s a good dental supply for oral treatment. It works great for home teeth care and doesn't stretch lips. You won’t feel uncomfortable. It is a perfect dental instrument for home dentistry. There’s another function. That is, you can use these Cheek Retractors for Speak Out Game or Watch Ya Mouth Game or other challenge games that require players to recite words without moving their lips. Wear one of these cheek retractors in your mouth and try to say a challenge phrase. Let your friend or family member take a wild guess of what you are saying! You can find more information by checking the product description below: O-Shape Lip and Cheek Retractor Dental