. "In addition it is believed that silicon, stainless steel, aluminum and other metal and plastic materials which possess the necessary characteristics of tissue-inertness, high tensile strength to resist breakage, and ready sterilization such as by boiling in the case of the HEMA hydrophilic polymer, or by soaking in alcohol or similar sterilizing solution as in the case of Teflon, would also prove" . . . . . .