Related Experiment Video
Updated: Aug 7, 2026

Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis
Published on: March 11, 2017
[Pressfit of equatorially roughened cementless acetabular components--a finite element analysis]
Marius von Knoch1, Thomas Pandorf, Robin Büscher
1Klinik für Orthopädie, Universität Duisburg-Essen, Deutschland. mariusvonknoch@yahoo.com
Aim:
Does the pressfit anchorage of cementless acetabular cups depend on the roughness of the pole? To answer this question the primary pressfit of two cementless acetabular cups which differ only with regard to the roughness of their poles were compared by means of finite elements analysis.
Materials And Methods:
It was assumed that the material properties of bone are homogeneous, isotropic and linearly elastic. Material-specific values of cancellous bone with three different bone densities were used. Assumption of isotropy represents an approximation.
Results:
Comparison of the two prosthesis designs revealed that both designs/shapes cause similar patterns of bone deformation and tension.
Conclusions:
It can therefore be concluded that with regard to pressfit anchorage the prosthesis with milled polar surface is according to FEA mechanically equivalent to the prosthesis with non-milled polar surface.
Related Concept Videos
Stress Concentrations in Circular Shafts
Flexural Stress
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to its distance...
Eccentric Axial Loading in a Plane of Symmetry
Design of Transmission Shafts - Stress Analysis
