Wyniki wyszukiwania - BazTech

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Ocena jakości stanu powierzchni wszczepu śródkostnego po jego dezintegracji z kością

Krauz D., Ziębowicz A., Bączkowski B.

Aktualne Problemy Biomechaniki

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2017

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z. 12

51--56

PL

Celem pracy była ocena jakości stanu powierzchni implantu, która mogłaby wskazywać na przyczynę utraty integracji wszczepu śródkostnego. Badania obejmowały obserwacje mikroskopowe oraz analizę składu chemicznego wszczepu śródkostnego w mikroskopie skaningowym firmy ZEISS SUPRA 35 wyposażonego w detektor SE. Potwierdziły one wykonanie implantu ze stopu Ti- 6Al-4V oraz wskazały na zaistniały proces osteointegracji. Powodem utraty zintegrowanego wszczepu było prawdopodobnie przeciążenie mechaniczne oraz złe nawyki higieniczne, palenie tytoniu oraz współistniejąca choroba przyzębia i wywołane nią periimplantitis.

EN

The aim of the study was the quality assessment of the state of the surface of the implant. The study included microscopic observations and analysis of the chemical composition of the implant intraosseous scanning microscope ZEISS SUPRA 35 equipped with a detector SE. They confirmed the execution of the implant alloy Ti-6Al-4V, and pointed to an apparent process of osseointegration. The reason of incorrect implants integration was probably mechanical overload or poor hygiene habits, smoking and periodontal disease – periimplantitis.

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Biomechanical analysis of individual all-ceramic abutments used in dental implantology

Ziębowicz B., Ziębowicz A., Bączkowski B., Kajzer W., Kajzer A.

Archives of Metallurgy and Materials

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2016

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Vol. 61, iss. 3

1357--1362

EN

Biomechanical analysis of individual all-ceramic abutments used in dental implantology The paper presents the results of finite element analysis and experimental testing under simulated physiological loading conditions on issues shaping the functional properties of individual all-ceramic abutments manufactured by CAD'CAM technology The conducted research have cognitive significance showing the all-ceramic abutment behavior, as a key element of the implantological system, under the action of cyclic load. The aim of this study was evaluation the fatigue behavior of yttria-stabilized zirconia abutment submitted to cyclic stresses, conducted in accordance with EN ISO 14801 applies to dynamic fatigue tests of endosseous dental implants.

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Preparation and characterization of ZnO-PMMA resin nanocomposites for denture bases

Cierech M., Wojnarowicz J., Szmigiel D., Bączkowski B., Grudniak A. M., Wolska K. I., Łojkowski W., Mierzwińska-Nastalska E.

Acta of Bioengineering and Biomechanics

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2016

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Vol. 18, no. 2

31--41

EN

Purpose: The aim of the paper was to investigate the antifungal activity of zinc oxide nanoparticles (ZnONPs) against Candida albicans. Some attempts have been made to find out the best way to introduce ZnONPs into polymethyl methacrylate (PMMA) resin material and to determine some parameters of a newly formed composite. Material and methods: Zinc oxide nanoparticles were manufactured and their basic physical parameters were determined (average particle size, density, specific surface area). Minimal inhibitory concentration (MIC) of ZnONPs was determined for the Candida albicans standard strain. The average size of ZnO conglomerates in the monomer solution of PMMA resin was measured using a dynamic light scattering instrument. PMMA resin samples with incorporated ZnONPs were produced. The morphology of nanopowder and the newly formed composite was examined under a scanning electron microscope (SEM). In addition, the roughness parameter of PMMA resin material was investigated before and after ZnONPs modification. Results: Nanopowder with the average particle size of 30 nm, density of 5.24 g/cm3 and surface area of 39 m2 /g was obtained. MIC was determined at the level of 0.75 mg/mL. The average size of ZnO conglomerates in the monomer solution of acrylic resin dropped by 11 times after ultrasound activation. SEM examination of a newly formed composite showed a successful introduction of ZnONPs confirmed by the energy dispersive X-ray spectroscopy (EDS) analysis. There were no statistically significant differences in the biomaterial roughness before and after the modification of ZnONPs. Conclusion: Zinc oxide nanoparticles were successfully incorporated into acrylic resin used for the production of denture bases. The presence of nanoparticles with sizes below 100 nm was confirmed. Nevertheless a newly created composite needs to be further investigated to improve its homogeneity, and to check its microbiological properties, strength and biocompatibility prior to its possible clinical use.

4

Wysokie budynki mieszkalne w Hongkongu

Bączkowski B.

Inżynieria i Budownictwo

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2007

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R. 63, nr 6

324-327

PL

Opisano specyficzne warunki wpływające na wysokościowe budownictwo mieszkaniowe w Hongkongu. Omówiono stosowane rozwiązania techniczne, a także uwarunkowania ekonomiczne wpływające na procesy decyzyjne programu budownictwa komunalnego.

EN

The specifical conditions having influence on multi-storeyed habitable buildings in Hongkong have bean described. The technical solutions and economical conditions, influencing on the decisive processed municipal building are coveraded.