A mouth guard comprising an arcuate body member positionable between the teeth of a user. The body member includes an incisor portion for confronting the incisors of the user and a pair of molar portions for confronting the molars of the user. Each said molar portion includes a hollow region. The hollow region may extend through its respective molar portion. Alternatively, the hollow region is contained within the body member and may also be air tight. The hollow region could also be a blind cavity. A resilient member, such as a spring or foam material, may be disposed within the hollow region. A bladder may be disposed in the hollow region, such as an air bladder or a bladder containing gel. A resilient member, such as a spring or foam material, may be disposed within the bladder. The bladder may be formed of a translucent or transparent material.
