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Biomechanical analysis of a new type of compressive splint used in carpal arthrodesis

Jiroušek O., Máca J., Jira J.

Acta of Bioengineering and Biomechanics

2001

Vol. 3, nr 1

59-73

This paper presents a numerical analysis of the state of stress in a new type of splint used for carpal arthrodesis. Using the finite element method we evaluated the state of stress of the splint and the respective bones in two important load cases. Results of the numerical analysis were confirmed by photoelasticity test applied to the splint model. A qualitative comparison of different approaches to modelling short bones used in the finite element method is also made.

Strain state and strength of acetabular component of total hip-joint endoprosthesis.

Jira J., Jirova J., Micka M.

Acta of Bioengineering and Biomechanics

1999

Vol. 1, nr 2

79-83

The paper deals with the new cementless acetabular cup of the Beznoska type. This cup is made of 1 mm thick titanium covering and polyethylene inner layer. Good initil implant stability is ensured by titanium projections on the outer surface. The purpose of the experimental research was to measure strains at selected points on the outer surface of the artificial cup. A computation model enables us to analyse the strain state generated not only by concentrated load, but also by uniformly distributed load or by varing load. The aim of the research was to analyse the strain state of the acetabular component and to find out the limit loading for assesment of strength and the loss of stability of the cup structure.