Stress and Reliability Analyses of the Hip Joint Endoprosthesis Ceramic Head with Macro and Micro Shape Deviations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F08%3APU79937" target="_blank" >RIV/00216305:26210/08:PU79937 - isvavai.cz</a>

Alternative codes found

RIV/61388998:_____/08:00322478

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Stress and Reliability Analyses of the Hip Joint Endoprosthesis Ceramic Head with Macro and Micro Shape Deviations

Original language description

The principal aim of this work is finding the reasons of the head's fractures because in the Czech Republic, some time ago, in vivo fracture of ceramic heads of total hip joint endoprostheses has been stated in a not negligible number of patients. The reliability of the ceramic head is based on the Weibull weakest link theory. The probability of the failure depends on the tensile stress values in the head, on the volume in which stress acts and on the material parameters of the used bioceramics (aluminium oxide). The stress analyses of the ceramic heads were realized using computational modelling - FEM system ANSYS under ISO 7206-5 loading. The maximum values of the tensile stress (the first principal stress) in the ceramic head are significantly influenced on the shape deviations of conical surfaces of the head and the stem cones. There are two types of the shape deviations - the first is macro deviations (different angle of the taper of the stem cone and the head cone), the second is

Czech name

Napjatostní a spolehlivostní analýza keramické hlavice totální kyc(elní endoprotézy s makro a mikro tvarovými odchylkami

Czech description

The principal aim of this work is finding the reasons of the head's fractures because in the Czech Republic, some time ago, in vivo fracture of ceramic heads of total hip joint endoprostheses has been stated in a not negligible number of patients. The reliability of the ceramic head is based on the Weibull weakest link theory. The probability of the failure depends on the tensile stress values in the head, on the volume in which stress acts and on the material parameters of the used bioceramics (aluminium oxide). The stress analyses of the ceramic heads were realized using computational modelling - FEM system ANSYS under ISO 7206-5 loading. The maximum values of the tensile stress (the first principal stress) in the ceramic head are significantly influenced on the shape deviations of conical surfaces of the head and the stem cones. There are two types of the shape deviations - the first is macro deviations (different angle of the taper of the stem cone and the head cone), the second is

Type

D - Article in proceedings

CEP classification

BO - Biophysics

OECD FORD branch

—

Project

<a href="/en/project/1P05ME789" target="_blank" >1P05ME789: Simulation of mechanical function of selected segments of human body</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

13th International Conference on Biomedical Engineering

ISBN

978-3-540-92840-9

ISSN

—

e-ISSN

—

Number of pages

4

Pages from-to

—

Publisher name

Springer

Place of publication

Singapore

Event location

Singapore

Event date

Dec 3, 2008

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—