A nonmagnetic stainless alloy that is free of nickel and ferrite phases can be used in implantable orthopedic applications such as bone plates, bone screws, and spinal-fixation components. The corrosion-resistant BioDur 108 has been tested for biocompatibility, including cytotoxicity, irritation, acute systemic toxicity, pyrogenicity, mutagenicity, implantation with histopathology, and hemocompatibility. Its high nitrogen content enables it to maintain an austenitic structure for greater tensile and fatigue strength than alloys containing nickel. The material also resists pitting and crevice corrosion owing to its high levels of chromium and nitrogen as well as its molybdenum content. Carpenter Technology Corp., Wyomissing, PA, 610/208-2000.
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A nonmagnetic stainless alloy that is free of nickel and ferrite phases can be used in implantable orthopedic applications such as bone plates, bone screws, and spinal-fixation components. The corrosion-resistant BioDur 108 has been tested for biocompatibility, including cytotoxicity, irritation, acute systemic toxicity, pyrogenicity, mutagenicity, implantation with histopathology, and hemocompatibility. Its high nitrogen content enables it to maintain an austenitic structure for greater tensile and fatigue strength than alloys containing nickel. The material also resists pitting and crevice corrosion owing to its high levels of chromium and nitrogen as well as its molybdenum content.