SprintRay OnX Tough 2 ResinThe only 3D printing resin FDA cleared for fixed hybrid dentures Introducing SprintRay OnX Tough 2, a groundbreaking dental 3D printing resin that has received FDA clearance for use in creating fixed hybrid dentures. This resin leverages the cutting edge NanoFusion technology, which set a new industry standard by offering exceptional durability and visual quality. The result is a remarkably lifelike appearance that closely resembles natural enamel.