A numerical study of effects of the manufacture perturbations to contacts of the total hip replacement

Title:

A numerical study of effects of the manufacture perturbations to contacts of the total hip replacement

Creator:

Koukal, Milan, Fuis, Vladimír, Florian, Zdeněk, and Janíček, Přemysl

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:8d60038d-f0ee-46f2-89b4-163f54f74a1c
uuid:8d60038d-f0ee-46f2-89b4-163f54f74a1c

Subject:

total hip replacement, FEM, roundness, contact pressure, frictional moment, and biomechanics

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In endoprosthesis surgery there are typically a high percentage of implant defects, these can lead to failure of the whole prosthesis. One type of total hip replacement function loss is acetabular cup loosening from the pelvic bone. This article examines manufacture perturbations as one of the possible reasons for this kind of failure. Both dimension and geometry manufacturing perturbations of ceramic head and polyethylen cup were analyzed. We find that perturbations in the variables analysed here affect considered values of contact pressure and frictional moment. Furthermore, contact pressure and frictonal moment are quantities affecting replacement success and durability. From obtained results we can recommend to fit head and cup with a clearance of between 0 mm andd 0.05 mm. We do not recommend using interference type of fit. Roundness perturbation of ceramic head should not exceed 0.025 mm. and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

33-42

Source:

Engineering mechanics: international journal for theoretical and applied mechanics | 2011 Volume:18 | Number:1

Harvested from:

CDK

Metadata only:

false