Silverfil Argentum is the world's first and only completely non-toxic dental filling with ZERO Free Mercury ZERO BPA and ZERO Fluoride. A revolutionary material, Silverfil works just like any other dental filling, employing the same usage and handling techniques, but minus the problems of excess mercury or BPA within the fillings. Unlike conventional dental amalgams, Silverfil consists of only silver particles and a partially amalgamated silver-mercury compound. It contains no tin or copper. The highly reactive powder of Silverfil completely absorbs all of the mercury used for amalgamation, leaving no traces of any of mercury behind in the fillings (tested at City University, London and University of Malaya, Kuala Lumpur). No free mercury, No Bisphenol -A (BPA), No Fluoride