Wyniki wyszukiwania - Biblioteka Nauki

1

Abrasion Resistance Test of the Modified Ti13Nb13Zr Alloy Surface

100%

Lisoń-Kubica J. , Taratuta A. , Antonowicz M. , Basiaga M.

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2023

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tom nr 2

55--64

EN

The research describes an atomic layer deposition (ALD) coating method and its application on a new generation of titanium alloy (Ti13Nb13Zr) for biomedical applications. The study aimed to assess the physicochemical properties and mechanics of a titanium alloy coated with titanium oxide (TiO2) or aluminium oxide (Al2O3) using the ALD method. The physicochemical properties of the surface coatings were evaluated through microscopic observations, potentiodynamic tests, surface wettability tests, optical profilometry scratch tests, and abrasion tests. Based on the data obtained, different physicochemical properties of the alloy with titanium nitride and titanium oxide coatings were found. Such differences were dependent on the number of cycles used and the temperature of the manufacturing process. The coatings have reduced the abrasion coefficient, thus improving the abrasion resistance of the Ti13Nb13Zr alloy, which enables their use within the skeletal system. These findings are of practical importance for applying this type of surface modification to various types of miniaturised implants used in the skeletal system.

PL

Badania polegają na opisaniu metody osadzania powłok atomowych i możliwości jej zastosowania na stopie tytanu nowej generacji do zastosowań biomedycznych. Celem pracy jest ocena wpływu właściwości fizyko chemicznych i mechanicznych zmodyfikowanego stopu Ti13Nb13Zr powłoką tlenku tytanu (TiO2) oraz tlenku glinu (Al2O3) przy użyciu metody ALD. W ramach oceny własności fizykochemicznych tak powstałych powłok powierzchniowych przeprowadzono obserwacje mikroskopowe (SEM), badania potencjodynamiczne, badania zwilżalności powierzchni, profilometrię optyczną, scratch test oraz badania ścieralności powłok. Na podstawie uzyskanych danych stwierdzono zróżnicowane własności fizykochemiczne stopu z powłokami tlenku glinu oraz tlenku tytanu w zależności od zastosowanej ilości cykli oraz temperatury procesu wytwarzania. Powłoki mają obniżony współczynnik ścieralności, poprawiając tym samym odporność na ścieranie stopu Ti13Nb13Zr, co umożliwia ich zastosowanie w układzie kostnym. Uzyskana na tej podstawie wiedza ma znaczenie praktyczne dla zastosowania tego typu modyfikacji powierzchni dla różnych rodzajów zminiaturyzowanych implantów znajdujących swoje zastosowanie w układzie kostnym.

2

A study on the physicochemical properties of surface modified Ti13Nb13Zr alloy for skeletal implants

88%

Lisoń J. , Taratuta A. , Paszenda Z. , Dyner M. , Basiaga M.

Acta of Bioengineering and Biomechanics

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2022

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tom Vol. 24, no. 1

39--47

EN

As it is widely stated in the literature, biofilms are responsible for most chronic infections, which have grown exponentially over the past three decades. The use of so-called alloys, as a new generation of materials, enables us to find the golden mean in the arena widely known as implantology. The use of the surface layer, using the chosen Atomic Layer Deposition method, is to be the basis for minimizing the risk of an organism reactions. Therefore, the primary objective of this study was to observe the impact of physicochemical properties of the surface layers (bactericidal) on the processes that occur on the implants surface made of titanium biomaterials used in bone structures. The study also attempted to evaluate the physicochemical properties of the ZnO coatings, deposited on the substrate of one of the new generation Ti13Nb13Zr alloys, using the ALD method. Included in the assessment of the physicochemical properties of the surface layers formed in this manner, we perform pitting corrosion resistance tests, scratch tests, tribological tests and surface wettability tests. Based on the obtained data, the differing physicochemical properties of the alloy with ZnO coatings are found to be dependent on the applied surface modification. For the conducted tests, differences are determined for the tests on the corrosion resistance, surface wettability and the abrasion resistance for samples with and without the ZnO coating. In addition, tests show that the coating applied to the alloy, which is previously subjected to the sand-blasted process, is characterized by improved adhesion.

3

Study of the Mechanical and Antibacterial Properties of Surface Modified Steel for Medical Applications

88%

Taratuta A. , Lisoń-Kubica J. , Kazek-Kęsik A. , Antonowicz M. , Basiaga M.

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2023

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tom nr 2

85--95

EN

Various types of metal implants, both in Poland and worldwide, are mainly manufactured from stainless steel due to their biocompatibility, strength, and relatively low price. However, any such procedure involves the risk of peri-implant infection, stimulated, among other things, by the formation of a bacterial biofilm on the surface of the implant. In this paper, several methods of modifying the surface of steel for medical applications were proposed, such as mechanical polishing, electropolishing, sandblasting, and the application of a thin surface layer. This was followed by a series of physicochemical and biological tests. The results indicate that the titanium nitride coating improved corrosion resistance and reduced bacterial adhesion on the surface. No significant improvement in abrasion was observed, and the adhesion of the coating closely depended on the method of preparation.

PL

Implanty metalowe, zarówno w Polsce, jak i na świecie, produkowane są głównie ze stali nierdzewnej ze względu na jej biokompatybilność, wytrzymałość i stosunkowo niską cenę. Jednak każdy tego rodzaju zabieg wiąże się z ryzykiem powstania zakażenia okołowszczepowego, stymulowanego m.in. powstawaniem biofilmu bakteryjnego na powierzchni implantu. W pracy zaproponowano kilka metod modyfikacji powierzchni stali do zastosowań medycznych, takich jak polerowanie mechaniczne, elektropolerowanie, piaskowanie oraz nałożenie cienkiej warstwy powierzchniowej. Następnie przeprowadzono szereg badań fizykochemicznych i biologicznych. Wyniki wskazują, że powłoka azotku tytanu poprawiła odporność na korozję oraz ograniczyła adhezję bakterii na powierzchni. Nie zaobserwowano znaczącej poprawy ścieralności, a adhezja powłoki ściśle zależała od metody jej przygotowania.

4

Biodegradable scaffolds for bone defect treatment

88%

Antonowicz M. , Brzezinska K. , Walke W. , Taratuta A. , Pawlik M.

Acta of Bioengineering and Biomechanics

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2023

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tom Vol. 25, no. 3

EN

Additive techniques in dog orthopedics has recently emerged as a valuable approach in fabricating individualized implants for receiver-specific needs. The scaffolds made by 3D printing are used to replaces bones damaged by injuries sustained in accidents, tumour resections and defects resulting from disease e.g. osteoporosis. In this way can promote the growth and reconstruction of bone defects structure. These implants should have the right properties to ensure the right conditions for bone fusion. It is also important to determine the time of degradation, which is associated with a significant loss of mechanical properties.

5

Effect of Ta2O5 layer on the antibacterial and physicochemical properties of NiTi alloy

75%

Taratuta A. , Paszenda Z. , Lisoń J. , Kazek-Kęsik A. , Antonowicz M. , Basiaga M.

Engineering of Biomaterials

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2021

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tom Vol. 24, no. 163

34

6

Modern methods of surface modification for new-generation titanium alloys

75%

Lisoń-Kubica J. , Taratuta A. , Goldsztajn K. , Antonowicz M. , Walke W. , Dyner A. , Basiaga M.

Acta of Bioengineering and Biomechanics

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2022

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tom Vol. 24, no. 4

147--158

EN

The constantly growing need for the use of implants in osteotomy is mainly due to the aging population and the need for long-term use of this type of biomaterials. Improving implant materials requires the selection of appropriate functional properties. Currently used titanium (Ti) alloys, such as Ti6Al4V and Ti6Al7Nb, are being replaced by materials with better biocompatibility, such as vanadium(V) or niobium (Nb), allowing for creation of the so-called new generation alloys. These new alloys, with the incorporation of zirconium (Zr), iron, and tantalum, possess Young’s modulus close to that of a bone, which further improves the improves the biomaterial’s. biocompatibility. This article describes the atomic layer deposition (ALD) method and its possible applications in the new generation of titanium alloys for biomedical applications. Also, the exemplary results of tin oxide (SnO2) thin coatings deposited by ALD and physical vapor deposition (PVD) methods are presented. This study aimed to evaluate the physicochemical properties of a Ti13Nb13Zr alloy used for elements in the skeletal system. As the temperature and the number of cycles vary, the results demonstrate that the surface area of the samples changes. The uncoated Ti13Nb13Zr alloy exhibits hydrophilic properties. However, all coated specimens improve in this respect and provide improved clinical results. after the applied modification, the samples have a smaller contact angle, but still remain in the range of 0–90°, which makes it possible to conclude that their nature remains hydrophilic. Coating the specimens decreased the mineralization risk of postoperative complications. As a result, the biomaterials demonstrated improved effectiveness, decreased complication indicators, and improved patient well-being.

7

Microstructure and antibacterial properties of a ZnO coating on a biomaterial surface

51%

Basiaga M. , Paszenda Z. , Lisoń J. , Taratuta A. , Kazek-Kęsik A. , Krok-Borkowicz M. , Nuckowski P. , Szindler M. , Staszuk M. , Major Ł. , Major R. , Barabaszová K. Č. , Dyner M.

Archives of Civil and Mechanical Engineering

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2022

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tom Vol. 22, no. 2

art. no. e93, 1--18

EN

A promising strategy for fighting the bacterial biofilm on the surface of biomaterials involves modification of their surface with the use of bactericidal and bacteriostatic coatings. Ongoing studies concentrate on the development of material that can limit bacterial colonisation and is safe for the human organism. Therefore, the current research focuses on the conditions related to implant coating to limit biofilm formation. However, previous outcomes in this area have not been satisfactory. Accordingly, the main goal of the carried out tests was to study the impact of the physicochemical properties of the surface layers on the course of processes taking place on the surface of implants made of metallic biomaterials used in the bone system. The surface of the analysed biomaterial -316LVM steel - was modified using such processes as grinding, electrochemical polishing, sandblasting, application of a ZnO layer using low-temperature Atomic Layer Deposition (ALD), and medical sterilisation. Initial assessments involved the chemical composition, phase composition, and the microstructure of the surface layer. The last stage involved microbiological studies, including an assessment of the adhesion of Gram-positive and Gram-negative bacteria to the modified surface, proliferation of MG-63 osteoblast-like cells and cytotoxicity tests. The analysis of adhesion of S. aureus and E. coli colonies confirmed that the ZnO coating is effective in reducing bacterial adhesion to the 316LVM steel substrate, regardless of the number of cycles, process temperature and surface treatment method.