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Bones implants based on Fe
Hávová, Mariana ; Vondrák, Jiří (referee) ; Sedlaříková, Marie (advisor)
This thesis refers to Fe-based biodegradable materials and their potencial aplications in medicine, especially as temporary bone implants. This work generaly summaries aplications of biomaterial in medicine with more interest kept on biodegradable materials and their in-vivo corrosion. The experimental part refers to conduction of porous Fe-based materials with silica addition. The structure of prepared specimens is identified by EDX and XRD analysis. The imersion test and electrochemical studies were conducted to observe corrosion behaviour with respect to different concentration of silica. Potenciodynamic curves were obtained to determine corrosion potencial and corrosion current density of prepared samples.
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Biodegradabilní plasty a přírodní materiály, jejich zhodnocení a odstranění
Radová, Kateřina
The thesis deals with biodegradable plastics and natural materials. The main aim is to evaluate the increasing production of waste from the mentioned materials closely related to the methods of waste management and the legislative background concerning biodegradable waste. The work is divided into two parts. The theoretical part contains a literature review, which is based on academic sources. The practical part evaluates the degree of chosen samples of biodegradable plastics and natural materials based on cellulose in period one year.
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Hodnocení biologicky rozložitelných materiálů v modelových podmínkách skládky, kompostu a půdě
Zourková, Andrea
The thesis focused on biologically degradable materials. It describes legal environment of the Waste management in the Czech Republic, charakteristice and structuring of biodegradable waste. Furthermode it deals with the usage of materials in various sectors and finally the elimination of biodegradable materials. The practical part examined the information about plastic cups for beveranges saying the were one hundred per cent compostable and biodegradable. Four types of the cups were chosen, placed and observed in polystyrene boxes according to the methodology to simulate the conditions of dump, compost and soil, for six moths. The results was following: two types of plastic cups were partly decomposed and the other two types were not changed at all.
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Preclinical research of degradation of metallic osteosynthetic alloys in vivo on animal biomodels
Machoň Levorová, Jitka ; Foltán, René (advisor) ; Hauer, Lukáš (referee) ; Hirjak, Dušan (referee)
The dissertation is dealing with the option of using biodegradable metal alloys such as osteosynthetic material in maxillofacial surgery, The hypothesis presupposes that Zn-1,6Mg and WE43 alloys are from the viewpoint of the degradation period and biological interactions suitable for fixation of facial skeleton. The theoretical part of the work evaluates current trends in the use of biodegradable metal alloys. It monitors the development of material for osteosynthesis in maxillofacial surgery emphasizing the biological reactions of material and undesirable qualities including their clinical impact. The experiment part of the work is divided in two successive stages. The first stage used the rat biomodel to implant Zn-1,6Mg and WE43 alloys. The aim was to compare the duration of degradation and to receive the reaction of the ambient tissue. The animals were euthanized in regular intervals. They were scanned ex vivo by means of cone-beam tomography to find the degradation period of each alloy. Histopathological examination was performed to receive the reaction of the ambient bone tissue. The conclusion evaluates WE43 alloy is more suitable for osteosynthesis in the facial skeleton according to the results of the first stage. The second stage used the rabbit biomodel for implantation of WE43 and titanium as a...
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Bones implants based on Fe
Hávová, Mariana ; Vondrák, Jiří (referee) ; Sedlaříková, Marie (advisor)
This thesis refers to Fe-based biodegradable materials and their potencial aplications in medicine, especially as temporary bone implants. This work generaly summaries aplications of biomaterial in medicine with more interest kept on biodegradable materials and their in-vivo corrosion. The experimental part refers to conduction of porous Fe-based materials with silica addition. The structure of prepared specimens is identified by EDX and XRD analysis. The imersion test and electrochemical studies were conducted to observe corrosion behaviour with respect to different concentration of silica. Potenciodynamic curves were obtained to determine corrosion potencial and corrosion current density of prepared samples.
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