Jumbo Bionic Trabecular Metal Acetabular Cups Improve Cup Stability During Acetabular Bone Defect Reconstruction:A Finite Element Analysis Study  

作　　者：Jianlin Xiao Haowen Xue Zhihui Qian Shenghao Xu Xianyue Shen Zhuo Zhang Lei Ren Luquan Ren 

机构地区：[1]Department of Orthopedics,China-Japan Union Hospital of Jilin University,Changchun,130033,China [2]Key Laboratory of Bionic Engineering Ministry of Education,Changchun,130025,China [3]Department of Orthopedics,The Second Hospital of Jilin University,Changchun,130041,China [4]Department of Orthopedics,The First Affiliated Hospital of University of Science and Technology of China,Anhui Provincial Hospital,Hefei,230001,China [5]Weihai Institute for Bionics-Jilin University,Weihai,264400,China

出　　处：《Journal of Bionic Engineering》2023年第6期2814-2825,共12页仿生工程学报（英文版）

基　　金：This work was supported by funding from China Postdoctoral Science Foundation(No:2020M670863);Jilin Scientific and Technological Development Program(No:20230203089SF).

摘　　要：The biomechanical effects of acetabular revision with jumbo cups are unclear.This study aimed to compare the biomechanical effects of bionic trabecular metal vs.titanium jumbo cups for the revision of acetabular bone defects.We designed and reconstructed American Academy of Orthopaedic Surgeons(AAOS)type I–III acetabular bone defect models using computed tomography scans of a man without acetabular bone defects.The implantation of titanium and trabecular metal jumbo cups was simulated.Stress distribution and relative micromotion between the cup and host bone were assessed using finite element analysis.Contact stress on the screws fixing the cups was also analyzed.The contact stress analysis showed that the peak contact stress between the titanium jumbo cup and the host bone was 21.7,20.1,and 23.8 MPa in the AAOS I–III models,respectively;the corresponding values for bionic tantalum jumbo cups decreased to 4.7,6.7,and 11.1 MPa.Analysis of the relative micromotion showed that the peak relative micromotion between the host bone and the titanium metal cup was 10.2,9.1,and 11.5μm in the AAOS I–III models,respectively;the corresponding values for bionic trabecular metal cups were 17.2,18.2,and 31.3μm.The peak contact stress on the screws was similar for the 2 cup types,and was concentrated on the screw rods.Hence,acetabular reconstruction with jumbo cups is biomechanically feasible.We recommend trabecular metal cups due to their superior stress distribution and higher relative micromotion,which is within the threshold for adequate bone ingrowth.

关 键 词：Acetabular bone defect Finite element analysis Trabecular metal Jumbo cup 

分 类 号：TG14[一般工业技术—材料科学与工程]