Custom-made pelvic prostheses are normally employed to reconstruct the biomechanics of the pelvis for improving patient＇s life quality. However, due to the large demand of biomechanical performance around the pelvic ...Custom-made pelvic prostheses are normally employed to reconstruct the biomechanics of the pelvis for improving patient＇s life quality. However, due to the large demand of biomechanical performance around the pelvic system, the customized prosthesis needs to be studied for its strength and stability. A hemi-pelvic finite element model, including a custom-made prosthesis and the surrounded main ligaments, was created to study the strength and stability of the system. Based on the developed finite element model, the relationship between the pre-stress of the screws and the biomechanical performance of the reconstructed pelvis was investigated. Results indicate that the pre-stress should not exceed 1000 N during surgery in order to prevent fatigue fractures from happening to screws. Moreover, four screws were removed from the pelvic system without affecting the fixing stability of the system, which provide surgical guidance for surgeons in terms of safety and fixation.展开更多
基金This work was supported by the Program of the National Natural Science Foundation of China （Grant Nos. 51205303 and 51323007）, the Fundamental Research Funds for the Central Universities, the Research Fund for the Doctoral Program of Higher Education of China （RFDP）, and the Program of International Scientific ＆ Technological Cooperation and Exchange Planning of Shaanxi Province （Grant No. 2017KW-ZD-02）.
文摘Custom-made pelvic prostheses are normally employed to reconstruct the biomechanics of the pelvis for improving patient＇s life quality. However, due to the large demand of biomechanical performance around the pelvic system, the customized prosthesis needs to be studied for its strength and stability. A hemi-pelvic finite element model, including a custom-made prosthesis and the surrounded main ligaments, was created to study the strength and stability of the system. Based on the developed finite element model, the relationship between the pre-stress of the screws and the biomechanical performance of the reconstructed pelvis was investigated. Results indicate that the pre-stress should not exceed 1000 N during surgery in order to prevent fatigue fractures from happening to screws. Moreover, four screws were removed from the pelvic system without affecting the fixing stability of the system, which provide surgical guidance for surgeons in terms of safety and fixation.
