4 documents found, page 1 of 1
The influence of hydroxyapatite crystals on the viscoelastic behavior of poly(v...
Quinaz, Tiago Filipe Simões; Freire, Tânia F.; Olmos, Andrea Alexandra Rodrigues; Martins, Marcos; Ferreira, Fernando; Moura, Marcelo F. S. M. deComposites of poly(vinyl alcohol) (PVA) in the shape of braids, in combination with crystals of hydroxyapatite (HAp), were analyzed to perceive the influence of this bioceramic on both the quasistatic and viscoelastic behavior under tensile loading. Analyses involving energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) allowed us to conclude that the production of a homogeneous lay...
Osteosynthesis metal plate system for bone fixation using bicortical screws: nu...
Olmos, Andrea Alexandra Rodrigues; Fertuzinhos, Aureliano Costa; Campos, Teresa Daniela Azevedo; Dias, R. Isabel; Viegas, A. Carlos; Pereira, F. A. M.This study reports the numerical and experimental characterization of a standard immobilization system currently being used to treat simple oblique bone fractures of femoral diaphyses. The procedure focuses on the assessment of the mechanical behavior of a bone stabilized with a dynamic compression plate (DCP) in a neutralization function, associated to a lag screw, fastened with surgical screws. The non-linear...
Fracture characterisation of bone-cement bonded joints under mode I loading
Campos, Teresa Daniela Azevedo; Barbosa, M. L. S.; Olmos, Andrea Alexandra Rodrigues; Martins, Marcos Silva; Pereira, F. A. M.; de Moura, M. F. S. F.Over the years, many techniques have been developed for the stabilisation of bone fractures. The study of the adhesion of bone-to-bone cement is an important step towards the development of new immobilization systems. Although bone cement has been used for more than fifty years, very few studies have been performed regarding the evaluation of fracture properties. In this work, numerical and experimental investi...
Osteosynthesis metal plate system for bone fixation using bicortical screws: nu...
Olmos, Andrea Alexandra Rodrigues; Fertuzinhos, Aureliano Costa; Dias, Maria Isabel Ribeiro; Pereira, Fábio André MagalhãesThis work describes the numerical modelling of an immobilization system currently used to repair long bone fractures. The referred system was employed to ensure the mechanical stabilization of an oblique bone fracture by means of a dynamic compression plate (DCP) and bicortical screws. The numerical characterization of the fixation system was performed to obtain stress and strain fields in cortical bone tissue....