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The mechanical strength of additive manufactured intraosseous transcutaneous amputation prosthesis, known as the ITAP

College of Engineering, Swansea University, Swansea, UK

Special Issues: Additive Manufacturing: From Medical Applications to Synthetic Biology

The focus of this research is the ability to manufacture, when using layer base production methods, the medical insert known as ITAP used for prosthetic attachment in a femur. It has been demonstrated using computational modelling that a 3-dimensional build of the ITAP has the lowest stress present when the honeycomb infill pattern’s percentage is set at 100%, with the ITAP being constructed on a horizontal printing bed with the shear forces acting adjacent to the honeycomb structure. The testing has followed the British standard ISO 527-2:2012, which shows a layer base printed tensile test sample, with a print setting of 100% infill and at a side print orientation; this was found to withstand a greater load before failure than any other printed test configuration. These findings have been validated through simulations that analyses the compression, shear and torque forces acting upon an augmented femur, with an imbedded ITAP model.
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