Research Of Femoral Fracture Simulation Analysis After Hip Replacement Surgery

For people everyday routines,the illness around the hip has profound influences,and has become the hottest study field.For the remedy of the later period hip illness,the most efficacious means is the hip arthroplasty.The hip arthroplasty is able to eliminate the arthralgia,redress the malformation,and regain the arthrosis propulsion.But the collapse due to femoral cataclasis is still in high probability,which put a load on the public medical organization and lead to the additive suffering working on patients.The inconsistency among the femoral stem and the femoral marrow cavity is the most general origin that leads to femoral cataclasis,causing excessive stress centralized field and elevating the hazard of femoral cataclasis.The treatise puts an effort to assess the biological mechanics capability after the hip arthroplasty by means of the extended finite element mode,so as to elevate the adaptation among the femoral stem and the femoral marrow cavity,and pick the stem that has the most collocation with every patient,ameliorating the stress dispersion and the arthrosis functional rebuilding.The characteristic study course of events is the rebuilding of the geometrical and the material attribution model of the femur on the foundation of the CT scanned data.5femoral stems set up via reverse project are constituted with femur mold,the practical hip arthroplasty procedure is imitatly reproduced by way of the exploded view.The built assembly molds are treated as the finite element analysis objects on the favors of mesh segmentation software Hypermesh and pre-processing setting software ABAQUS.The biological mechanics capability of the stems beneath the perpendicular burden are analyzed,contrasted,and deliberated,comprising the commence of the crack,the crack expansion path,the dispersion of the principle stress and strain,the magnitude of the burden at the moment of the crack commence,the dispersion of the shear stress,and the magnitude of the stem dislocation.The results show that if the shape of the standard prosthesis matches the normal shape of the femoral bone marrow cavity better,then the magnitude of the load on prosthesis should be larger when the crack appears,the crack propagation path should be more regular,and the stress and strain distribution should be more uniform.The displacement should also be smaller.The results were judged on the basis of the femoral crack state,combined with other indicators and through these parameters to comprehensively judge the shape matching degree of each prosthesis and femoral bone marrow cavity,which provided a basis for the geometric optimization of the prosthesis and for the doctor to choose the proper product based on the bone property of the patients.