KAPUSTKA Katarzyna

Spoluautoři HAJDUGA Maciej, JĘDRZEJCZYK Dariusz

From the large number of available metals with the memory of shape only a few of them found clinical application. Biocompatibile orthodontic wires, applied in case of false occlusion reconstruction, are made of intelligent materials and components. The phenomenon origins from the shape memory. The alloy, deformed plastically in the lower temperature regains its initial shape in the higher temperature. Orthodontic wires, due to their purpose and use, succumb to damage. Hence the exploitation in very demanding conditions of oral cavity makes us search for very efficient reparation system. From the large number available materials with a shape memory only few of them complied with clinical application. It is a result of tough criteria measures implemented to implants- targeting fulfilling biological requirements. Austenitic steels, applied in medicine, belong to metallic biomaterials particularly exposed to damage, due to ongoing processes of corrosion strain. It is connected with its weakest resistance to electrochemical corrosion in environment of organism fluids hence lower susceptibility to selfpassivation. The appearance of the foreign body in the organism stimulates many mechanisms aiming its elimination. So if the foreign substance, in this case the wire, is traced by immunological system, the organism starts production of antybodies of strong oxidizing functions. Antybodies consolidate near the implant and absorb into biomaterial. Defensive reaction of the organism is becoming one of the reasons of degradation of biomaterials. The work is devoted to the influence of corrosion environment in the efficiency of applied repairing connections towards NiTi wires.

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