Design And Mechanical Analysis Fo Personalized Femoral Prosthesis With Porous Materials

In recent years,digital design technology has become increasingly popular in the field of human bone repair.Compared with traditional prosthesis design flow methods,the digitized design technology of human skeletal lesion area significantly improves the production efficiency and quality of prosthetic restorations,and at the same time meets the personalized design requirements of prostheses.The femur is the main bearing structure of the human body and plays an important role in supporting the human body.This article focuses on the femoral osteoma lesions and the key technologies in the digital design flow of femoral prostheses: the preparation of lesion-site prostheses,the relationship between porosity and elastic modulus of femoral preparation materials,and the prosthesis implanted into the human body The study of design and mechanical properties as well as the structural improvement of the prosthesis were studied,and a relatively complete feminine personal restoration prosthesis framework was achieved.The main content of this paper is as follows:Personalized bone restoration design.The traditional bone-cutting and prosthesis design schemes rely too much on the doctor's clinical surgical experience.The uncertainties have more influence,making it difficult to achieve the implanting requirements for the accuracy of the bone-cutting and prosthesis design in the designed surgical procedure.This article through the digital design software,through the analysis of the patient's original CT data to view the patient's lesion area information.The doctor can simulate the bone cutting operation in the software,and design the digital geometric model of the restoration based on the patient's CT data,improve the design accuracy of the traditional restorations,and solve the shortcomings of the mismatch between the geometry of the restoration and the surrounding bone tissue.Identification of the elastic modulus of the porous model.In view of the excessive elastic modulus of the traditional bone prosthetic materials,the stress of the bone tissue is shielded,so that the bone tissue is not sufficiently mechanically stimulated andatrophied.In this paper,the microstructural construction of the matrix material of the restoration is given on the scale of the microstructure,so that the microstructure of the restoration is as similar to the actual bone tissue as possible.The digital simulation analysis method was used to identify the relationship between the microstructure's porosity and the elastic modulus,and the results of the experimental data were compared.The identification relationship obtained through comparative analysis was consistent with the characteristics of the actual model.Therefore,different elastic moduli can be obtained by adjusting the porosity of the prosthetic microstructure,thereby avoiding the stress shielding effect of the bone tissue.Digital analysis and verification of restoration biomechanics.For the implantation of the prosthesis inside the human skeleton,a corresponding finite element model was established.Simulate the actual force characteristics of the medical area and apply the corresponding load and boundary conditions.Adjust the value of the porosity of the restoration to simulate the patient's stress in various parts under different working conditions.Finally,according to the simulation results,analyze whether the model as a whole and each part of the model Meet the requirements of relevant mechanical properties.It can be concluded that the optimal implant porosity of the prosthesis can be obtained on the premise of satisfying the mechanical properties of the prosthesis.Prosthetic structure optimization design and improvement.The stress concentration and structural weight reduction of the prosthesis after loading.The structural optimization was performed on the problem of stress concentration in the excessive body of the ear and the prosthesis and the screw holes.And through simulation,analyze the effect before and after optimization.Finally,according to the actual application requirements,combined with the finite element topology method,the structural model of the restoration body structure is optimized.A method for how to construct a lightweight restoration body under the premise of satisfying the mechanical performance is proposed.