Material for stopping teeth and dental moulding wax, denture adhesives, dental amalgams, dental cement, dental lacquers and mastics; materials for making casts, false teeth and caps, crowns and bridges, dental fillings and protective coatings, prostheses and models; materials for making false teeth, dentures, pivots, dental implants, dental crowns, prostheses and implant prostheses, porcelain for dental prostheses and silicones for dental prostheses