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)
The anisotropic, inhomogeneous, multiply collagenous architecture of the annulus reflects the complex pattern of mainly tensile stresses developed in this region of the disc during normal function. Structural and mechanical responses of fully hydrated in-plane sections taken from within single lamellae of the outer annulus of healthy bovine caudal discs(More)
STUDY DESIGN Microstructural/micromechanical investigation of pathways of anular wall disruption. OBJECTIVE To investigate the fundamental mechanisms by which both intralamellar and interlamellar relationships are disrupted by nuclear pressurization. SUMMARY OF BACKGROUND DATA Understanding how anular failure might occur following increased nuclear(More)
The implementation of new methods of oseoporotic therapy requires tests on an animal model. One of the best is the sheep, whose numerous advantages over other models are described in the literature. The aim of this study was induction of osteoporosis using steroids and ovariorectomy methods in sheep and description of the change in parameters with regard to(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)
PURPOSE To compare stability and subsidence associated with 3 types of cervical spine stabilisation. METHODS The C3 to C4 vertebrae of 28 Polish pigs were used. Pigs with intact vertebrae (group 1) underwent standard anterior cervical discectomy (group 2), followed by stabilisation using a cage alone (group 3), a cage with plate (group 4), or a plate-cage(More)
Glycation consists in formation of advanced glycation end-products (AGE) during non-enzymatic reaction between reducing sugars and proteins, lipids or nucleic acids. This review is focused mainly on glycation of collagen and its role in acceleration of vascular disease. Collagen is an extracellular matrix protein characterized by unique structure forming(More)
A good understanding of thoracic biomechanics is important for complete examination and control of chest behaviour under conditions of physiological and pathological work, and under the impact of external forces leading to traumatic loading of the chest. The purpose of the study was to analyse the mechanical properties of human ribs obtained from(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)
The annulus fibrosus is the primary load-bearing component of the intervertebral disc responsible for proper transfer of loads in the spine. The aim of this study was to determine selected mechanical parameters of multilayer specimens of the annulus fibrosus of the intervertebral disc during uniaxial tensile loading. The anatomical location(More)