Sports mouth guard

Abstract From the Canadian patent

A mouthguard comprising a generally resilient member having at least an upper U-shape portion corresponding generally to the shape of the arch of the upper jaw into which both the, upper and lower teeth are significantly spaced and stabilized together, with at least the lower molars and lower second bicuspids interdigitated into the underside of the upper portion. A generally resilient shoulder extending downward unitarily from the posterior region of the lower surface of the bottom portion has a lower planar surface unitarily thereon spaced generally parallel to the upper surface in the molars-second bicuspid areas for separating the upper and lower molar-bicuspid areas and has, a width …