A NONLINEAR FINITE-ELEMENT ANALYSIS OF INTERFACE CONDITIONS IN POROUS COATED HIP ENDOPROSTHESES

被引：31

作者：

ROHLMANN, A ^{[1
]}

CHEAL, EJ ^{[1
]}

HAYES, WC ^{[1
]}

BERGMANN, G ^{[1
]}

机构：

[1] HARVARD UNIV,BETH ISRAEL HOSP,SCH MED,ORTHOPAED BIOMECH LAB,BOSTON,MA 02215

来源：

JOURNAL OF BIOMECHANICS | 1988年 / 21卷 / 07期

关键词：

BIOMECHANICS - Joints - COBALT CHROMIUM MOLYBDENUM ALLOYS - MATHEMATICAL TECHNIQUES - Finite Element Method - POROUS MATERIALS - Protective Coatings - STRESSES - Analysis;

D O I：

10.1016/0021-9290(88)90224-2

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

We used a geometrically simplified finite element model to investigate load transfer between a porous coated hip endoprosthesis and a femur. Assuming both rigidly bonded and nonlinear interfaces, we analyzed fully and partially coated stems that had coatings of different elastic moduli. Our results indicate that maximum values for relative motion in the interface between bone and implant occur for implants with the same elastic modulus as compact bone. By comparison, interface motion is reduced by about half for Co-Cr-Mo alloy stems. We also showed that the elastic modulus of the porous coating had only a small influence on bone stresses.

引用

页码：605 / 611

页数：7

共 17 条

[1] A SOLUTION METHOD FOR PLANAR AND AXISYMMETRIC CONTACT PROBLEMS [J].