Celina Pezowicz

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The purpose of this study was to investigate the structural mechanisms that create cohesion between the concentric lamellae comprising the disc annulus. Sections, 50-60 microm thick, were obtained using a carefully chosen cutting plane that incorporated the fibrous component in alternating lamellae as in-plane and cross-sectioned arrays. These sections were(More)
Background. In this paper are presented problems with the usage of transpedicular spine fixators. The purpose of this work was to define the value of pull-out strength of transpedicular screw from vertebrae. Impact of geometrical parameters of transpedicular screw (length and diameter of screw thread part, screw design) on value of pull-out strength was(More)
BACKGROUND AND PURPOSE Clinical observations show that subsidence of cervical interbody implants takes place in the early postoperative period. Additional plating or use of a plate-cage is thought to be helpful to avoid excessive subsidence. We performed a biomechanical comparative study to assess the process of subsidence after the use of three different(More)
OBJECTIVE To assess feasibility and accuracy of a new insertion technique of S1 transpedicular screw. SUMMARY OF BACKGROUND DATA Transpedicular stabilization in the first sacral vertebra (S1) is a technically demanding surgical procedure with inherent risk of loosening of the implant. A modification of the technique was recently proposed, along with the(More)
Objective. The purpose of the present work was to assess the validity of a six-degrees-of-freedom gait analysis model based on the ISB recommendation on definitions of joint coordinate systems (ISB 6DOF) through a quantitative comparison with the Helen Hays model (HH) and repeatability assessment. Methods. Four healthy subjects were analysed with both(More)
The problem of the loosening and pullout of bone screws in cervical spine stabilisation is a significant factor in failed implantations of that spine region. Therefore, studies were undertaken to determine the impact of the loading history of bone screws of the cervical spine, inserted from the anterior approach, on the stability of the screw-bone(More)
Pure and calcium-doped silica and titanium dioxide thin films were prepared by the sol-gel method. Two different metallic substrates, i.e. stainless steel (316L) and titanium alloy (Ti6Al4V), were used for thin film deposition. Physicochemical properties and roughness of the thin films derived were investigated using the Raman spectroscopy, X-ray(More)
BACKGROUND AND PURPOSE The aim of this paper was to investigate the effects of intervertebral fusion (Cloward and Robinson-Smith techniques) on the intradiscal pressure at the adjacent levels exposed to compression loads. MATERIAL AND METHODS A biomechanical study was performed using cadaveric cervical spine. 12 cervical spines exposed to a compression(More)
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