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1 2008

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Laser Forming vs. Electrical Discharge Machining of Needle-Palisade Fixation Systems for Cementless THRA Endoprosthesis Preprototypes

Rogala P., Mielniczuk J., Uklejewski R., Winiecki M., Auguściński A., Berdychowski M.

Machine Dynamics Problems

2008

Vol. 32, No. 1

80-87

This paper presents results of prototyping of cementless THRA endoprosthesis with needle-palisade fixation system designed within the framework of the research project No 4 T07C 056 29. There are presented main instructions for modelling and prototyping according to Rogala's patents (Rogala, patents, 1999). CAD models present fragments of the needle-palisade fixation system, semicircle shaped fragments of the endoprosthesis and preprototype of total THRA endoprosthesis. The modelled elements were saved as STL format and printed with SLA. To verify the possibility of manufacturing of needle-palisade fixation system of the Rogala's cementless THRA endoprosthesis various samples of the fixation system were manufactured by one of direct metal manufacturing (DMM) technology - Selective Laser Melting (SLM). Fragments of needle-palisade fixation system were also manufactured by Electrical Discharge Machining (EDM). The paper presents the variety of designed samples and remarks concerning the producibility the needdle-palisade fixation manufacturing with the considered technologies.