scholarly journals Tribocorrosion of a CoCrMo alloy sliding against articular cartilage and the impact of metal ion release on chondrocytes

2019 ◽  
Vol 94 ◽  
pp. 597-609 ◽  
Author(s):  
B. Stojanović ◽  
C. Bauer ◽  
C. Stotter ◽  
T. Klestil ◽  
S. Nehrer ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Metal Ion ◽  
Ion Release ◽  
Cocrmo Alloy ◽  
Metal Ion Release ◽  
The Impact

scholarly journals In Vitro Physical-Chemical Behaviour Assessment of 3D-Printed CoCrMo Alloy for Orthopaedic Implants

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 857
Author(s):  
Radu Mirea ◽  
Iuliana Manuela Biris ◽  
Laurentiu Constantin Ceatra ◽  
Razvan Ene ◽  
Alexandru Paraschiv ◽  
...  
Keyword(s):  
Metal Ion ◽  
Protective Layer ◽  
Ion Release ◽  
Cocrmo Alloy ◽  
Physical Chemical ◽  
Metal Ion Release ◽  
Short Period ◽  
3D Printed ◽  
Metallic Sample

In this study, a CoCrMo-based metallic alloy was manufactured using a 3D-printing method with metallic powder and a laser-based 3D printer. The obtained material was immersed in a simulated body fluid (SBF) similar to blood plasma and kept 2 months at 37 °C and in relative motion against the SBF in order to mimic the real motion of body fluids against an implant. At determined time intervals (24, 72, 168, 336, and 1344 h), both the metallic sample and SBF were characterized from a physical-chemical point of view in order to assess the alloy’s behaviour in the SBF. Firstly, the CoCrMo based metallic sample was characterized by scanning electron microscopy (SEM) for assessing surface corrosion and X-ray diffraction (XRD) for determining if and/or what kind of spontaneous protective layer was formed on the surface; secondly, the SBF was characterized by pH, electrical conductivity (EC), and inductively coupled plasma mass spectroscopy (ICP-MS) for assessing the metal ion release. We determined that a 3D-printed CoCrMo alloy does not represent a potential biological hazard in terms of the concentration of metal ion releases, since it forms, in a relatively short period of time, a protective CoCr layer on its exposed surface.

scholarly journals The impact of nanosilver addition on element ions release form light-cured dental composite and compomer into 0.9% NaCl.

2014 ◽  
Vol 61 (2) ◽  
Author(s):  
Krzysztof Sokołowski ◽  
Małgorzata I Szynkowska ◽  
Aleksandra Pawlaczyk ◽  
Monika Łukomska-Szymańska ◽  
Jerzy Sokołowski
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Test Tube ◽  
Dental Composite ◽  
Nacl Solution ◽  
Ion Release ◽  
Dental Fillings ◽  
Metal Ion Release ◽  
Different Temperatures ◽  
The Impact

The aim of this paper was to identify and to assess in semi-quantified way the release of different ions from composite and compomer restorative materials subjected to 0.9% NaCl solution, which simulates the environment of the human body. In the present study, the number of ions (Al, Ag, Ba, Sr, Ti) released from dental fillings over time (one week, one month and 3 months), in different temperatures (23°C, 37°C) and depending on the materials applied (unmodified/modified with nanosilver) was investigated. The results suggest that nanosilver addition influences directly on the process of metal ion releasing into 0.9% NaCl solution. The increase in the number of counts of metal ions was observed in the solutions in which samples modified with nanosilver were kept. Higher amount of metal ion release was observed for composite samples rather than for compomer materials. The study revealed that in general the number of released metal ions increases with the time of storage (for metal ions: Ti, Ba, Sr) and at higher temperature (Ag, Ti, Ba). Reverse tendency observed for silver ion release versus incubation time may be caused by the process of silver adsorption, which takes place on the surface of analyzed material and test-tube walls, where samples were incubated.

scholarly journals Bioactive Plasma Coatings on Orthodontic Brackets: In Vitro Metal Ion Release and Cytotoxicity

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 857
Author(s):  
Lasni Samalka Kumarasinghe ◽  
Neethu Ninan ◽  
Panthihage Ruvini Lakshika Dabare ◽  
Alex Cavallaro ◽  
Esma J. Doğramacı ◽  
...  
Keyword(s):  
Metal Ion ◽  
Prolonged Exposure ◽  
Orthodontic Brackets ◽  
Plasma Polymer ◽  
Functional Coatings ◽  
Key Factors ◽  
Ion Release ◽  
Metal Ion Release ◽  
Surface Functionalisation

The metal ion release characteristics and biocompatibility of meta-based materials are key factors that influence their use in orthodontics. Although stainless steel-based alloys have gained much interest and use due to their mechanical properties and cost, they are prone to localised attack after prolonged exposure to the hostile oral environment. Metal ions may induce cellular toxicity at high dosages. To circumvent these issues, orthodontic brackets were coated with a functional nano-thin layer of plasma polymer and further immobilised with enantiomers of tryptophan. Analysis of the physicochemical properties confirmed the presence of functional coatings on the surface of the brackets. The quantification of metal ion release using mass spectrometry proved that plasma functionalisation could minimise metal ion release from orthodontic brackets. Furthermore, the biocompatibility of the brackets has been improved after functionalisation. These findings demonstrate that plasma polymer facilitated surface functionalisation of orthodontic brackets is a promising approach to reducing metal toxicity without impacting their bulk properties.

scholarly journals A New Nanocomposite Packaging Based on LASiS-Generated AgNPs for the Preservation of Apple Juice

Antibiotics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 760
Author(s):  
Maria Chiara Sportelli ◽  
Antonio Ancona ◽  
Annalisa Volpe ◽  
Caterina Gaudiuso ◽  
Valentina Lavicita ◽  
...  
Keyword(s):  
Metal Ion ◽  
Chemical Characterization ◽  
Average Diameter ◽  
Biological Action ◽  
Metal Species ◽  
Ion Release ◽  
Bioactive Materials ◽  
Transmission Electron ◽  
Metal Ion Release ◽  
Bulk Chemical

Designing bioactive materials, with controlled metal ion release, exerting a significant biological action and associated to low toxicity for humans, is nowadays one of the most important challenges for our community. The most looked-for nanoantimicrobials are capable of releasing metal species with defined kinetic profiles, either by slowing down or inhibiting bacterial growth and pathogenic microorganism diffusion. In this study, laser ablation synthesis in solution (LASiS) has been used to produce bioactive Ag-based nanocolloids, in isopropyl alcohol, which can be used as water-insoluble nano-reservoirs in composite materials like poly(3-hydroxybutyrate-co-3-hydroxyvalerate). Infrared spectroscopy was used to evaluate the chemical state of pristine polymer and final composite material, thus providing useful information about synthesis processes, as well as storage and processing conditions. Transmission electron microscopy was exploited to study the morphology of nano-colloids, along with UV-Vis for bulk chemical characterization, highlighting the presence of spheroidal particles with average diameter around 12 nm. Electro-thermal atomic absorption spectroscopy was used to investigate metal ion release from Ag-modified products, showing a maximum release around 60 ppb, which ensures an efficient antimicrobial activity, being much lower than what recommended by health institutions. Analytical spectroscopy results were matched with bioactivity tests carried out on target microorganisms of food spoilage.

scholarly journals Metallic Implants: Atomic Scale Origin of Metal Ion Release from Hip Implant Taper Junctions (Adv. Sci. 5/2020)

2020 ◽  
Vol 7 (5) ◽  
pp. 2070027
Author(s):  
Shanoob Balachandran ◽  
Zita Zachariah ◽  
Alfons Fischer ◽  
David Mayweg ◽  
Markus A. Wimmer ◽  
...  
Keyword(s):  
Metal Ion ◽  
Atomic Scale ◽  
Ion Release ◽  
Hip Implant ◽  
Metallic Implants ◽  
Metal Ion Release

Surface properties and cell response of low metal ion release Ti-6Al-7Nb alloy after multi-step chemical and thermal treatments

Biomaterials ◽  
2005 ◽  
Vol 26 (11) ◽  
pp. 1219-1229 ◽  
Author(s):  
Silvia Spriano ◽  
Michela Bosetti ◽  
Marco Bronzoni ◽  
Enrica Vernè ◽  
Giovanni Maina ◽  
...  
Keyword(s):  
Surface Properties ◽  
Cell Response ◽  
Metal Ion ◽  
Thermal Treatments ◽  
Ion Release ◽  
Metal Ion Release

scholarly journals Metal Ion Release in Bastnaesite Flotation System and Implications for Flotation

Minerals ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 203 ◽  
Author(s):  
Shiming Cao ◽  
Yijun Cao ◽  
Zilong Ma ◽  
Yinfei Liao
Keyword(s):  
Metal Ion ◽  
Ion Release ◽  
Metal Ion Release ◽  
Bastnaesite Flotation

scholarly journals A Zinc(II) Photocage Based on a Decarboxylation Metal Ion Release Mechanism for Investigating Homeostasis and Biological Signaling

2015 ◽  
Vol 54 (44) ◽  
pp. 13027-13031 ◽  
Author(s):  
Prem N. Basa ◽  
Sagar Antala ◽  
Robert E. Dempski ◽  
Shawn C. Burdette
Keyword(s):  
Metal Ion ◽  
Release Mechanism ◽  
Ion Release ◽  
Metal Ion Release

SMART Biosensor for Early Diagnostic Detection of Metal Ion Release in Orthopedic Patients: Initial Outcome

2018 ◽  
Vol 4 (4) ◽  
Author(s):  
Mathew T. Mathew ◽  
Thymur Chaudhary ◽  
Michael Jacobs ◽  
Divya Bijukumar ◽  
Markus A. Wimmer ◽  
...  
Keyword(s):  
Metal Ion ◽  
Ion Release ◽  
Metal Ion Release ◽  
Initial Outcome ◽  
Orthopedic Patients ◽  
Diagnostic Detection ◽  
Early Diagnostic
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