Knee implants still lacks sufficient design solutions to ensure improved long term performance without aseptic loosening and the subsequent revision surgery.The present paper, used full factorial design of experiment (DOE) method along with finite element analysis (FEA) to assess the influence of internal ...
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Knee implants still lacks sufficient design solutions to ensure improved long term performance without aseptic loosening and the subsequent revision surgery.The present paper, used full factorial design of experiment (DOE) method along with finite element analysis (FEA) to assess the influence of internal contours of femoral component on mechanical stability of the prosthesis, and the biomechanical stresses experienced by the femoral component, bone cement and the adjoining bone with preservation of the external contours.The WASPAS approach, as a multi criteria decision analysis (MCDA) technique, was then used to rank the alternative designs. The results of analysis of variance showed that the internal shape of femoral component contours influenced the performance measureswhere the angle between the distal and anterior cuts, the angle between the distal and posterior cuts, and the cement thickness were highlysignificant. The predictive mathematical models of each performance measureswre also estimated through statistical analysis. The ranking order and the following sensitivity analysis revealed that the top designs mostly had higher cement thickness and the original design was not the top choice for femoral component which by improving the current designbetter long term performance can be achieved.
