Browsing by Subject "cement kostny"

Now showing 1 - 3 of 3

Access status: Restricted ,
Badanie właściwości mechanicznych polimerowych cementów kostnych.
(Data obrony: 2018-07-12) Adamuszek, Ewa
Wydział Inżynierii Materiałowej i Ceramiki
Access status: Open Access ,
Mechanical properties of biodegradable bone cement composites
(Wydawnictwa AGH, 2009) Iskander, Berlanty A.; Kamel, Nagwa A.
A material that can be used as a scaffold in tissue engineering must satisfy a number of requirements. These include biocompatibility, biodegradation to non toxic products within the time frame required for the application, process ability to complicated shapes with appropriate porosity, ability to support cell growth and proliferation, and appropriate mechanical properties, as well as maintaining mechanical strength during most part of the tissue regeneration. In the present work, the bone cement composites were prepared by mixing different ratios of calcium sulfate dehydrate ($CaSO_{4}.2H_{2}O$) filler (60, 65 and 70 wt%) with the polyester resin/NV, MMA, NV/MMA monomers mixture. The biodegradability of PSF crosslinked with NV, MMA and NV/MMA loaded with 60% gypsum was studied using Simulated Body Fluid SBF (pH 7.3) in vitro medium. The degradation rate of fumarate based polyesters as well as bone cement composites were measured as the percentage of weight loss over time of exposure to the SBF solutions. The mechanical properties showed different behavior according to the bone cement concentration. The compressive strength and the microstructure were also studied before and after immersing in SBF solution.
Access status: Open Access ,
Wpływ dodatków modyfikujących na właściwości hydroksyapatytowych wielofunkcyjnych tworzyw implantacyjnych przeznaczonych na nośniki leków
(Data obrony: 2007) Zima, Aneta
Wydział Inżynierii Materiałowej i Ceramiki
Implant materials which can be used as drug carriers have to meet many strict requirements such as appropriate open and total porosity, size and shape of pores and also adequate mechanical strength. It is recommended that open pore system enables slowly release of medium incorporated into drug delivery system. The rate and quantity of released medicament depend mainly from physical properties of biomaterial (particularly its microstructure), the medicament replacement in the implant volume (home- and heterogeneous system), also from the type of drug and its physicochemical properties. The aim of this work was to elaborate modified multifunctional bioceramics hydroxyapatite implants for bone defect filling and local drug delivery system (DDS), that will be placed in not loaded body parts. The kinetic of drug released in homo- and heterogeneous system was evaluated. For modification of Hap bioceramic $Ca(PO_{3})_{2}$ and $Mg_{3}(PO_{4})_{2} 8H_{2}O$ were used.