A mouth guard can be used in different sports, where it is necessary to protect the teeth. The mouthguard is usually made of acrylic or rubber, and to get the ultimate protection, the mouthguard needs to be shaped after the teeth. Mouth guards are available with single protection, that only covers the upper part of the mouth or double protection that covers both the upper and the lower part of the mouth. The latter gives the best protection, but at the same time it can bother the breathing. Mouthguards decrease the risk of dental damage and concussion and are indispensable when you play hockey. When mouth guards were invented they were mainly used by boxers, but today they are used in most “tough” contact sports like hockey and American football.