a dental appliance is disclosed designed to protect a wearer &# 39 ; s dentitions against injury from impacts suffered in sports or other activities that can cause chipping , fracturing , dislodging or evulsion of teeth . the appliance may be custom - fittable with at least one pocket having an energy absorbing fluid . the energy absorbing fluid be nanosuspensions of small particles in viscous fluids that can undergo shear thickening when the dental appliance is struck by an object . the appliance dampens and diffuses horizontal and axial forces and directs them away from dentitions thereby reducing the risk for dental injuries .