BIOCOMPATIBLE METALLIC MATERIALS FOR OSTEOSYNTHESIS MADE BY ICEM – SA, ROMANIA
Chemical Product Design and Engineering (CPD&E)
Chemical Product Design & Development - IV (CPD&E - 4)
Keywords: orthopaedic implant , austenitic steel, biocompatibility
Biomedical materials are a section of materials science what deals with the design, synthesis and use of materials for surgical implants in the human body in order to
reestablish the function and/or the structure of degraded human structures. The large range of applications of metallic materials may be due to the multiple combinations of chemical, physical and mechanical properties making them compatible with the biological environment.
The orthopaedic implant is a mechanical device which replaces or supports parts of the human skeleton structure, being exposed to a variety of biological and mechanical stress. The implant must perform requirements without causing any adverse effects on the human body.
The paper presents the applied research developed by ICEM - SA for the manufacturing and validation of bars (3-5 mm) and wires (<1,0 - 2,5 mm) from austenitic stainless steel for the production of accessories for osteosynthesis medical kits and of temporary orthopaedic implants.
The quality requirements for this austenitic stainless steel are:
- fine grain structure;
- reduced content of non-metallic inclusions and solid phase
(i.e. carbide of chrome and molybdenum );
- absence of delta ferrite;
- absence of segregation of alloying elements;
- surface quality of semi-finished products with influence on mechanical properties and corrosion resistance;
- high tensile strehgth (over 800 N/mm2 ).
The elaboration in ICEM - SA of austenitic stainless steel for osteosynthesis require:
- a severe control of raw materials;
- steelmaking and casting in vacuum induction furnace(CIV);
- electric slag remelting (ESR);
- drawing with intermediary austenitisation treatments severely controlled.
It was elaborated a new generation of austenitic stainless steel, nitrogen alloyed.
All metallic materials was tested for evaluation of biocompatibility , tests necessary for using this products as implants in human body.
Presented Thursday 20, 11:36 to 11:54, in session Chemical Product Design & Development - IV (CPD&E - 4).
