A finite element model for evaluation of tibial prosthesis-bone interface in total knee replacement.
A finite element model for evaluation of tibial prosthesis-bone interface in total knee replacement.
复制标题
用于评估全膝关节置换术中胫骨假体-骨界面的有限元模型。
DOI：
10.1016/0021-9290(92)90055-6
复制
发表时间：
1992
影响因子：
2.4
通讯作者：
P. Rubin
中科院分区：
文献类型：
--
作者：
R. Rakotomanana;P. Leyvraz;A. Curnier;J. Heegaard;P. Rubin
开发了基于有限元方法的数值模型，用于全膝关节置换术中胫骨骨-植入物界面处的载荷传递分析。接下来，针对骨本构定律开发了基于二次弹性势和希尔二次屈服准则的横向各向同性材料模型。骨水泥和骨假体界面均被认为是不连续的。界面摩擦采用基于库仑准则的干摩擦模型。该模型能够给出这些界面处的压应力和剪应力分布以及分散性和相对剪切微运动。对骨水泥金属托盘总髁 (MTTC) 以及骨水泥和非骨水泥多孔涂层解剖 (PCA) 胫骨平台进行了初步应用。研究发现 PCA 平台比 MTTC 平台更容易变形，并且具有更大的整体位移。对于未骨水泥的 PCA，观察到骨钉界面的脱粘。相应地，PCA 托盘下方界面处的应力峰值低于 MTTC。两个假体的托盘下方均出现剪切微运动。我们观察到骨各向异性和界面不连续性明显影响结果。
A numerical model based on the finite element method was developed for the load transfer analysis at the tibial bone-implant interfaces in total knee replacement. A transverse isotropic material model, based on a quadratic elastic potential and on Hill's quadratic yield criterion, was next developed for bone constitutive laws. The bone-cement and bone-prosthesis interfaces were both assumed to be discontinuous. A dry friction model based on Coulomb's criterion was adopted for the interfaces friction. The model was shown to be able to give compressive and shear stresses distributions and distractive and relative shear micromotions at these interfaces. A preliminary application was conducted for cemented metal tray total condylar (MTTC) and for cemented and uncemented porous coated anatomic (PCA) tibial plateaus. The PCA plateaus were found to be more deformable and had greater global displacements than the MTTC one. Debonding of the bone-peg interface was observed for the uncemented PCA. Correspondingly, the stress peaks at the interface beneath the tray were lower for the PCA than for the MTTC. Shear micromotions appeared under the tray for both the two prostheses. We observed that bone anisotropy and interface discontinuity affected the results sensibly.
登录
查看更多内容
全膝关节置换术中胫骨假体设计分析
影响因子：
2.4
作者：
Murase,K;Crowninshield,RD;Pedersen,DR;Chang,TS
通讯作者：
Chang,TS
影响因子：
2.4
作者：
CARTER, DR;FYHRIE, DP;WHALEN, RT
通讯作者：
WHALEN, RT
影响因子：
2.4
作者：
ASHMAN, RB;RHO, JY;TURNER, CH
通讯作者：
TURNER, CH
影响因子：
2.4
作者：
TURNER, CH;COWIN, SC;RICE, JC
通讯作者：
RICE, JC
影响因子：
2.4
作者：
RICE, JC;COWIN, SC;BOWMAN, JA
通讯作者：
BOWMAN, JA