Abstract

A potential new superelastic polymer for biomedical applications was assessed in order to investigate the activation temperatures, constant stress values, creep behaviour and the biocompatility. Temperatures were characterized by high sensitivity calorimeter. The critical stresses and load relaxation were determined by electromechanical testing machine in artificial saliva (SBF) at 37°C. The results were compared with NiTi and NiTiCu alloys. The biocompatibility was studied by means of cultures of MG63 cells. The new polymer exhibited a Tg at body temperature and the stress–strain curves showed a superelastic effect with physiological critical stress (low and continuous). Cell culture results showed that adhered cell number in new substrate was comparable to that obtained in a commercially pure Ti grade II surfaces evaluated in the same conditions and consequently the new polymer presents an excellent in-vitro response.

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