Deformačne - napěťová analýza povrchové náhrady kyčelního kloubu

Strain - Stress Analysis of Surface Prosthesis of Hip Joint

conference paper

en

Hip resurfacing surgery has been proposed as an alternative to THR for younger more active patients. The metal-on-metal hip resurfacing procedure involves fitting the femoral head with a metal surface and lining the acetabulum with a metal cup to form a pair of metal bearings. Short-term clinical results persuade us to deal with FE analyses because it is important for development of the surface replacement prosthesis. The objective of this contribution is to perform finite-element analyses of computational model of the total surface replacement with different materials of bearing couples (acetabular cup/femoral head) and physiological hip joint. All results will be compared one another and then confronted with results of the physiological hip joint. The three-dimensional computational model consists of these components: sacral, pelvic and femoral bone, muscles, artificial socket, and surface hip replacement. The geometrical models of bones are generated by means of computed tomography (CT) images. The geometry of the surface replacement was proposed. The FE model of bone reflects two types of the bone tissues (trabecular and cortical bone) and muscles that are important when standing on one leg. The model was loaded by force, corresponding to load during slow walking and by standing on one leg.

Povrchová náhrada byla navržena jako alternativa k totální náhradě kyčelního kloubu. Je určena pro mladší a aktivní pacienty. Procedura nahrazení zahrnuje nahrazení hlavy femuru kovovou tenkostěnnou komponentou a acetabula kovovou jamkou. Cílem práce bylo vykonat deforomačně-napěťovou analýzu kyčelního kloubu s aplikovanou povrchovou náhradou pro různé kombinace materiálů jamka/femorální komponenta. Prostorový konečnoprvkový model obsahoval: pánevní, křížovou a stehenní kost, svaly, povrchovou náhradu. Geometrický model byl vytvořen z CT řezů. Uvažujeme stoj na jedné dolní končetině.

Hip resurfacing surgery has been proposed as an alternative to THR for younger more active patients. The metal-on-metal hip resurfacing procedure involves fitting the femoral head with a metal surface and lining the acetabulum with a metal cup to form a pair of metal bearings. Short-term clinical results persuade us to deal with FE analyses because it is important for development of the surface replacement prosthesis. The objective of this contribution is to perform finite-element analyses of computational model of the total surface replacement with different materials of bearing couples (acetabular cup/femoral head) and physiological hip joint. All results will be compared one another and then confronted with results of the physiological hip joint. The three-dimensional computational model consists of these components: sacral, pelvic and femoral bone, muscles, artificial socket, and surface hip replacement. The geometrical models of bones are generated by means of computed tomography (CT) images. The geometry of the surface replacement was proposed. The FE model of bone reflects two types of the bone tissues (trabecular and cortical bone) and muscles that are important when standing on one leg. The model was loaded by force, corresponding to load during slow walking and by standing on one leg.

Biomechanics, Finite element analysis, Resurfacing prosthesis, Hip joint

Biomechanics, Finite element analysis, Resurfacing prosthesis, Hip joint

2007

01.07.2007

Taipei - Taiwan

Journal of Biomechanics

2

559–559

1