Fyhrie D P, Carter D R, Schurman D J
Veterans Administration R R & D Center, Palo Alto, California.
J Orthop Res. 1988;6(3):425-33. doi: 10.1002/jor.1100060314.
Three different interface geometries for porous ingrowth surface replacements of the hip were examined using two-dimensional linear and nonlinear contact finite element analyses. The results indicate that incorporation of a nearly flat prosthesis interface between the surface replacement and the underlying cancellous bone may reduce stress shielding and improve stress transfer from the component. For all designs analyzed, the bone stress shielding was insensitive to component material stiffness when the elastic modulus was greater than 30 MPa. The use of titanium instead of cobalt-chrome (Co--Cr) as the prosthesis material therefore had a negligible effect on stress shielding.
使用二维线性和非线性接触有限元分析，研究了三种用于髋关节多孔长入表面置换的不同界面几何形状。结果表明，在表面置换物与下方的松质骨之间加入近乎平坦的假体界面，可能会减少应力遮挡，并改善组件的应力传递。对于所有分析的设计，当弹性模量大于30 MPa时，骨应力遮挡对组件材料刚度不敏感。因此，使用钛而非钴铬合金（Co-Cr）作为假体材料对应力遮挡的影响可忽略不计。
