More than just a saliva ejector. Isolates and protects the tongue and evacuates fluids, while maintaining a dry work area. The frame of the tongue holder makes a vacuum-chamber inside the filter, providing a large, soft suction surface. This ensures a drier work area when working in the lower jaw (sealants, cementing crowns and bridges). Useful when the assistant is not present. No sharp edges or corners. Reduces sedimentation of drilling by-products in pipes and tubings.