National Repository of Grey Literature 7 records found  Search took 0.01 seconds. 
Comparison of the computational and experimental modelling results of the hip joint endoprosthesis behaviour under pressing on the stem
Fuis, Vladimír ; Hlavoň, Pavel
The paper is concerned with the comparison of the computational and experimental results of the hip joint endoprosthesis ceramic head and stem cone self-adhesive connection. There were measured the tangential strain on the lower part of the head's sphere and vertically head displacement. The measured shape deflections from ideal cone shapes were implemented to the FEM model. The comparison of the computational and experimental data were realised for variants with the smooth and teethless stem.
Influence of the Measured Contact Cone Shape Deflections of the Hip Joint Endoprosthesis on the Stress and Reliability Values
Fuis, Vladimír ; Hlavoň, Pavel
The paper presents the results of the computational modelling of the stress states in the ceramic head of the hip joint endoprosthesis. IMS UMPIRE measures 3D shape deflections of the contact cone areas. These measured values were implemented to FEM model. The stress and reliability analyses follow. The values of maximum tensile stresses in the head and head's fracture probability curves create dispersion for random head putting on the stem cone.
Modelling of the oblique loading on the ceramic head of hip joint endoprosthesis
Fuis, Vladimír
The paper presents the problems with the computational modelling of the stress and reliability of the obliquely loaded ceramic head of the hip joint endoprosthesis. The first part is analyse the input parameters and then the analyse of the results of the computational modeling is realized.
Analysis of the measured production inaccuracies of the contact areas of the hip joint endoprosthesis parts
Fuis, Vladimír
In one hospital of the Czech Republic, more than 1 % of applied endoprostheses had to be reoperated. That is why the state of stress and the reliability of ceramic heads of total endoprosthesis is being intensively analysed by means of computational modelling. The production inaccuracies of the cone contact joint of the head and the stem is measured on the 3D device. Measured values are input to the computational modelling of the head stress analysis.
Experiences of the production inaccuracies measuring on the contact areas of the hip joint endoprosthesis stem and the head and its modelling
Fuis, Vladimír ; Hlavoň, P.
The paper presents the experiences of the mesuaring and modelling of the production inaccuracies of the cone contact junction of the stem and the head of the hip joint endoprosthesis.
Analysis of real production inaccuracies on the contact cone joint of head and stem
Fuis, Vladimír
Ceramic head reliability evaluation is significantly influenced by the factors that can allow increasing of the ten-sile stress in analysed body. Previous study eventuates that the production inaccuracies of contact cone joint of the head and the stem can significantly increase the tensile stress and decrease the reliability of whole implant. Paper deals with the problem of measuring real cone shape deflections on the different measuring devices.
Pravděpodobnost porušení keramické hlavice se změřenými tvarovými odchylkami na kontaktních plochách s různou polohou proti protikusu
Fuis, Vladimír
The paper deals with the problems of the failure probability of the ceramic part. There are considered the macro and micro shape deflections of the contacted cone areas. The macro shape deflection is different conicity of the contacted parts, micro shape deflections are the local shape deflection which are added with the macro shape deflections. The problems of the stress and probability of failure are solved using computational modelling.

Interested in being notified about new results for this query?
Subscribe to the RSS feed.