Recent studies have shown that a properly constructed, custom fabricated mouth guard can help reduce the incidence of a concussion when worn while playing contact sports. This is achieved when the proper thickness of the material is used. This proper thickness is not available in the stock over-the-counter (OTC) mouth guards. Results of the study showed players who wore the over-the-counter mouth guard had twice the rate of concussions than players who wore a properly designed and fitted mouth guard.