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Preclinical Strength Checking for Artificial Pelvic Prosthesis under multi-activities-A Case Study

Journal of Bionic Engineering 2019年第6期16卷 1092-1102页

作者： Enchun Dong Taimoor Iqbal Jun Fu Dichen Li Bin Liu Zheng Guo Alberto Cuadrado Zhen Zhen Ling Wang Hongbin Fan State Key Laboratory for Manufacturing System Engineering Xi'an Jiaotong UniversityXi'an 710054China Department of Orthopedics Xijing HospitalAir Force Medical UniversityXi'an 710032China Center for Medical Device Evaluation National Medical Product AdministrationBeijing 100081China Department of Mechanical Engineering University of Las Palmas de Gran CanariaLas Palmas de Gran Canaria 35017Spain

Customized prostheses are normally employed to reconstruct the biomechanics of the pelvis after resection due to tumors or *** objective of this study is to evaluate the biomechanics of the pelvis under different daily activities and to establish a functional evaluation methodology for the customized *** this purposes,finite element model of a healthy pelvis as well as a reconstructed pelvic model after type II+III resection were built for biomechanical *** biomechanical perfonnance of the healthy and reconstructed pelvic model was studied under routine activities including standing,knee bending,sitting down,standing up,walking,stair descent and stair ***,the strength and stability of the prosthesis were evaluated under these *** showed that,for the heathy pelvic model,the stresses were mainly concentrated around the upper part of the sacrum and the sacroiliac joint undergoing different activities,and the maximum stress occurred during stair *** for the reconstructed pelvis,the stress distribution and the tendency of the maximum stress variation predicted for the bone part during all the activities were similar to those of the natural pelvic model,which indicated that the load transferring function of the reconstructed pelvis could be restored by the ***,the predicted maximum von Mises stress of the screws and prosthesis was below the fatigue strength of the 3D printed Ti-6A1-4V,which indicated the prosthesis can provide a reliable mechanical performance after implantation.

关键词： pelvis bionic prosthesis finite element analysis multi-activities

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