Publication detail

Mechanická analýza styku hlavičky a jamky totální endoprotézy kyčelního kloubu

KOUKAL, M.

Original Title

Mechanická analýza styku hlavičky a jamky totální endoprotézy kyčelního kloubu

English Title

Mechanical analysis of contact between ball head and acetabular fossa of total hip prothesis

Type

conference paper

Language

Czech

Original Abstract

The paper belongs to biomechanics of a hip joint section. It is engaged in problems with industrial tolerances as one of the possible total hip prothesis insufficiency. Three computation models of the ball head and acetabular fossa were made, on which interference or clearance fit were simulated. Two computation models were 2D, from which one involve pelvis os and one was 3D. Real loading conditions of the hip joint during the slow walk of a human were simulated. Ascertained were values of contact presses and frictional moment needed to turn ball head in acetabular fossa. Finite element method (FEM) system ANSYS was used to computation. On 2D solution on model of the ball head and acetabular fossa was verified that industrial tolerances have big effect on values of contact pressure and its distribution and also on value of frictional moment, needed to turn the ball head in acetabular. It can be definitely said that from aspect of value and distribution of contact pressure and value of frictional moment the interference fit is very disadvantageous. Effect of industrial tolerances wasn’t verified in case of 2D model with pelvis os, when acetabular fossa was loaded in physiological position. Flexibility of acetabular fossa an pelvis os caused occurrence of the same contact area in every kind of fit. Therefore the results of all ascertained values were identical. In the meanwhile it is not possible to give any conclusions in case of 3D solution. In the present we have results just for one kind of fit (clearance fit). Analysis is in development.

Key words in English

Mechanical analysis of contact between ball head and acetabular fossa of total hip prothesis Mechanická analýza styku hlavičky a jamky totální endoprotézy kyčelního kloubu

Authors

KOUKAL, M.

RIV year

2004

Released

8. 9. 2004

Publisher

Strojnícka Fakulta STU v Bratislave

Location

Bratislava

ISBN

80-227-2105-0

Book

Strojné inžinierstvo 2004

Pages from

62

Pages to

62

Pages count

1

BibTex

@inproceedings{BUT12497,
  author="Milan {Koukal}",
  title="Mechanická analýza styku hlavičky a jamky totální endoprotézy kyčelního kloubu",
  booktitle="Strojné inžinierstvo 2004",
  year="2004",
  pages="1",
  publisher="Strojnícka Fakulta STU v Bratislave",
  address="Bratislava",
  isbn="80-227-2105-0"
}