ProxZir is a Custom manufacture of zirconia dental crowns by RSDL dental laboratories network; Custom milling of dental crowns by a dental laboratory. Constructed from 100 percent solid zirconia, the ProxZir Implant Prosthesis is a lifelike, more durable alternative to the screw-retained hybrid denture, and avoids the chips, stains and fractures that can compromise acrylic appliances.