Effects of Materials of Cementless Femoral Stem on the Functional Adaptation of Bone  

作　　者：He Gong Wei Wu Juan Fang Xin Dong Meisheng Zhao Tongtong Guo 

机构地区：[1]Department of Engineering Mechanics, Jilin University, Changchun 130022, P. R. China [2]Department of Neurosurgery, The First Hospital of Jilin University, Changchun 130021, P. R. China [3]Department of Cataract, Eye Hospital of the Second Clinical Hospital of Jilin University, Jilin University, Changchun 130051, P. R. China [4]School of Natural Sciences and Humanities, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, P. R. China

出　　处：《Journal of Bionic Engineering》2012年第1期66-74,共9页仿生工程学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （Nos. 10832012, 10872061 and 10972090） and Scientific Advancing Front and Interdiscipline Innovation Project of Jilin University （No. 200903169）.

摘　　要：The objective of this paper is to identify the effects of materials of cementless femoral stem on the functional adaptive behaviors of bone. The remodeling behaviors of a two-dimensional simplified model of cementless hip prosthesis with stiff stem, flexible ＇iso-elastic＇ stem, one-dimensional Functionally Graded Material （FGM） stern and two-dimensional FGM stem for the period of four years after prosthesis replacement were quantified by incorporating the bone remodeling algorithm with finite element analysis. The distributions of bone density, von Mises stress, and interface shear stress were obtained. The results show that two-dimensional FGM stem may produce more mechanical stimuli and more uniform interface shear stress compared with the stems made of other materials, thus the host bone is well preserved. Accordingly, the two-dimensional FGM stem is an appropriate femoral implant from a biomechanical point of view. The numerical simulation in this paper can provide a quantitative computational paradigm for the changes of bone morphology caused by implants, which can help to improve the design of implant to reduce stress shielding and the risk of bone-prosthesis interface failure.The objective of this paper is to identify the effects of materials of cementless femoral stem on the functional adaptive behaviors of bone. The remodeling behaviors of a two-dimensional simplified model of cementless hip prosthesis with stiff stem, flexible ＇iso-elastic＇ stem, one-dimensional Functionally Graded Material （FGM） stern and two-dimensional FGM stem for the period of four years after prosthesis replacement were quantified by incorporating the bone remodeling algorithm with finite element analysis. The distributions of bone density, von Mises stress, and interface shear stress were obtained. The results show that two-dimensional FGM stem may produce more mechanical stimuli and more uniform interface shear stress compared with the stems made of other materials, thus the host bone is well preserved. Accordingly, the two-dimensional FGM stem is an appropriate femoral implant from a biomechanical point of view. The numerical simulation in this paper can provide a quantitative computational paradigm for the changes of bone morphology caused by implants, which can help to improve the design of implant to reduce stress shielding and the risk of bone-prosthesis interface failure.

关 键 词：functionally graded material bone remodeling interface shear stress stress shielding femur implant 

分 类 号：Q959.4[生物学—动物学] TB34[一般工业技术—材料科学与工程]