An urgent task is the development of new implantation materials with a prolonged medicinal effect for treatment extrapulmonary form tuberculosis. The purpose this investigation was to obtain an material based on mesh polyurethane anti-tuberculosis drug isoniazid, study release isoniazid from polymer, biodegradation such materials, as well analyze cellular reactions their in body experimental an...

Silicon carbide (SiC) possesses a unique combination of properties such as high mechanical strength at elevated temperatures, wear resistance, low thermal expansion coefficient, temperature oxidation corrosion stability, radiation hardness, chemical inertness, and conductivity. Unfortunately, SiC is very brittle cannot, therefore, be used “as is”. SiC’s crack due to the prevention propagation, ...

Recently, efforts have been made to manufacture self-sensing smart composites by integrating piezoelectric sensors with laminates. However, the interleaving of pressure sensors, such as polymeric films, dramatically reduces impact resistance hosting laminates, and consequently, delamination can occur. This study aimed fabricate a composite material embedding nanofibers poly(vinylidenefluoride-t...

background: obtaining optimal marginal adaption with prefabricated stainless steel crowns (sscs) is diffi cult, especially after removing dental caries or defects in cervical areas. this situation requires the use of an ssc after tooth reconstruction. this study evaluated microleakage and material loss with fi ve restorative materials at ssc margins. materials and methods: one hundred and twent...

BACKGROUND This study aimed to assess the effect of surface preparation with sandblasting and diamond bur along with the use of three primers on shear bond strength (SBS) of metal brackets to aged composite. MATERIAL AND METHODS In this in vitro, experimental study, 60 Filtek Z250 composite discs were fabricated (10×2mm), immersed in distilled water for 24 hours and subjected to 5000 thermal ...

Abstract—The present study focused on carrying out the creep analysis in an isotropic thick-walled composite cylindrical pressure vessel composed of aluminum matrix reinforced with silicon-carbide in particulate form. The creep behavior of the composite material has been described by the threshold stress based creep law. The values of stress exponent appearing in the creep law were selected as ...

Abstract Composite peening offers the opportunity to introduce ceramic blasting particles into metallic base material. By embedding Al 2 O 3 particles, mechanical properties of aluminum can be improved. However, those surface modifications might negatively impact corrosion resistance and thus shorten lifetime components. This study analyzes peened in chloride solution via immersion, scanning el...