DEVELOPING AND VALIDATING A UNICOMPARTMENTAL KNEE REPLACEMENT MODEL

摘要: Statement of purpose: Finite element (FE) models bone can be used to evaluate new and modified knee replacements. Validation FE is seldom used, the quantification modelling parameters has a considerable effect on results obtained. The aim this study develop model cadaveric tibia validate it against comprehensive set experiments. Summary Methods: Seventeen tri-axial rosettes were attached cleaned, fresh frozen human was subjected 13 loading conditions. Deflection strain data for comparison with model. A geometric created basis computed tomography (CT) scans. CT map 600 orthotropic material properties tibia. All experiments simulated Measured principal strains compared their corresponding values using regression analysis. validated reduced in size (75mm proximal) then re-modelled represent only proximal This Virtual surgery performed implant UKR. Results: For whole model, line all axial loads combined had slope 0.999, an intercept −6.24 micro-strain, R2 value 0.962. root mean square error as percentage 5%. correlation coefficients 0.989 0.976 obtained maximum minimum respectively. Conclusions: An implanted been experimental data. able accurately predict deflection stresses replaced joint obtain clinically relevant information. will provide virtual unicompartmental arthroplasty, where variables such fixation method bearing mechanics assessed.