Comparison of Corrosion Products from Implant and Various Gold-based Abutment Couplings: The Effect of Gold Plating

2020 ◽  
Author(s):  
Matilde Duarte Silva ◽  
Terry R. Walton ◽  
Ghada O. Alrabeah ◽  
Danielle M. Layton ◽  
Haralampos Petridis
Keyword(s):  
Inductively Coupled Plasma ◽  
Crevice Corrosion ◽  
Structural Changes ◽  
Titanium Implants ◽  
High Concentration ◽  
Ion Release ◽  
Gold Plating ◽  
Inductively Coupled ◽  
Simulated Environment ◽  
Icp Ms

ABSTRACTThis study compared Ti, Pd, Pt, Au ion release following induced accelerated tribocorrosion from 3 gold alloy abutment groups coupled to titanium implants over time; investigated contacting surface structural changes; and explored the effect of gold plating. Three abutment groups: G (n=8, GoldAdaptTM, Nobel Biocare®), N (n=8, cast UCLA, Biomet3i™), P (n=8, cast UCLA, Biomet3i™, gold plated), coupled to implants (Nobel Biocare®), immersed in 1% lactic acid were cyclically loaded. Ions released (ppb) at T 1 , T 2 , T 3 , simulating 3, 5 and 12 months function were quantified by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and compared. Surface degradation and fretted particle composition after T 3 were evaluated with Scanning Electron Microscopy and Energy-dispersive X-ray Spectroscopy (SEM/EDX). ICP-MS data was non-parametric, expressed as medians and interquartile ranges. SEM/EDX showed pitting, crevice corrosion and fretted particles on the components. Released ion concentrations in all groups across time significantly decreased for Pd (p<0.001, medians ranged 1.70 to 0.09), Pt (p=0.021, 0.55 to 0.00) and Au (p<0.001, 1.01 to 0.00); and increased for Ti (p=0.018, 2.49 to 5.84). Total Ti release was greater than other ions combined for G (p=0.012, 9.86 vs 2.30) and N (p<0.001, 13.59 vs 5.70), but not P (p=0.141, 8.21 vs 3.53). Total Ti release did not differ between groups (p=0.36), but was less variable across Group P. On average, total ion release was 13.77 (8.91 to 26.03 IQR) ppb across the 12-month simulation. Tribocorrosion of titanium implants coupled with gold abutments in a simulated environment was evidenced by fretted particles, pitting and crevice corrosion of the coupling surfaces and release of ions. More Ti was released compared with Pd, Pt and Au; and continued to increase with time. Abutment composition influenced ion release. Gold plated abutments appeared to subdue variation in and minimize high concentration spikes of titanium.

Metal Ion Release and Cytotoxicity of Titanium Orthodontic Miniscrews

2017 ◽  
Vol 730 ◽  
pp. 141-147
Author(s):  
Katha Kosayadiloka ◽  
Nathaphon Tangjit ◽  
Suwannee Luppanapornlarp ◽  
Peerapong Santiwong
Keyword(s):  
Inductively Coupled Plasma ◽  
Metal Ion ◽  
The Self ◽  
Cytotoxicity Test ◽  
Ion Release ◽  
Element Analysis ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Metal Ion Release ◽  
Plasma Mass Spectrometry

The aim of this study was to investigate the metal ion release and cytotoxicity of MU orthodontic miniscrews as well as two other brands of orthodontic miniscrews over time. Twenty-four orthodontic miniscrews were tested, divided into three groups of eight. Each sample extraction was performed following the ISO 10993-12:2012 method. Solutions were collected after 1, 7, and 30 days (T1, T2, and T3). The supernatants extracted from these three groups were added and exposed to mouse L929 fibroblastic cell line using an MTT cytotoxicity test. They were also tested for ion release by inductively coupled plasma-mass spectrometry (ICP-MS). Element analysis by energy-dispersive X-ray spectroscopy (EDS) was used to analyze the surfaces of the miniscrews. The quantification of three elements, namely, titanium (Ti), aluminum (Al), and vanadium (V) were assessed. The results indicated that there were no statistical differences between the self-made orthodontic miniscrews and those from two commercial groups (p<0.05). Throughout the testing period, the quantity of ions increased from T1 to T3. After 24 h, vanadium was the first to appear on the surface in small quantities in other two commercial groups. The self-made orthodontic miniscrews exhibited no toxic effects on living cells.

scholarly journals Metallic ion release from biocompatible cobalt-based alloy

2014 ◽  
Vol 20 (4) ◽  
pp. 571-577 ◽  
Author(s):  
Ivana Dimic ◽  
Ivana Cvijovic-Alagic ◽  
Ivana Kostic ◽  
Aleksandra Peric-Grujic ◽  
Marko Rakin ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Artificial Saliva ◽  
High Strength ◽  
Metallic Ions ◽  
Ion Release ◽  
Inductively Coupled ◽  
Ph Values ◽  
Metallic Biomaterials ◽  
Icp Ms ◽  
Research Findings

Metallic biomaterials, which are mainly used for the damaged hard tissue replacements, are materials with high strength, excellent toughness and good wear resistance. The disadvantages of metals as implant materials are their susceptibility to corrosion, the elastic modulus mismatch between metals and human hard tissues, relatively high density and metallic ion release which can cause serious health problems. The aim of this study was to examine metallic ion release from Co-Cr-Mo alloy in artificial saliva. In that purpose, alloy samples were immersed into artificial saliva with different pH values (4.0, 5.5 and 7.5). After a certain immersion period (1, 3 and 6 weeks) the concentrations of released ions were determined using Inductively Coupled Plasma - Mass Spectrophotometer (ICP-MS). The research findings were used in order to define the dependence between the concentration of released metallic ions, artificial saliva pH values and immersion time. The determined released metallic ions concentrations were compared with literature data in order to describe and better understand the phenomenon of metallic ion release from the biocompatible cobalt-based alloy.

scholarly journals Grain Reconstruction of Palladium and Palladium-Nickel Alloys for Platinum Catchment

2019 ◽  
Vol 63 (4) ◽  
pp. 236-246
Author(s):  
A. Slagtern Fjellvåg ◽  
D. Waller ◽  
J. Skjelstad ◽  
A. Olafsen Sjåstad
Keyword(s):  
Pilot Plant ◽  
Inductively Coupled Plasma ◽  
Structural Changes ◽  
Ammonia Oxidation ◽  
Optical Emission ◽  
Pilot Scale ◽  
Laboratory Scale ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plant Reactor

Platinum-rhodium gauzes are frequently used to catalyse the high temperature ammonia oxidation step for production of synthetic nitrogen-based fertilisers. The gauzes suffer from Pt loss in the form of platinum dioxide (PtO2), due to the highly exothermic nature of the oxidation reaction. Industrially this is mitigated by installing one or more palladium-nickel catchment gauzes directly downstream of the combustion gauzes, to capture the lost Pt. The Pd-Ni catchment gauzes undergo severe structural modification during operation. In this study, we undertake a systematic study in a laboratory-scale furnace system to determine the role of each of the constituent gases O2, H2O and PtO2 on the structural changes of the Pd-Ni gauzes. In addition, some samples are exposed to real industrial conditions in an ammonia combustion pilot plant reactor. Fresh and spent catchment gauzes are analysed by means of scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA) and inductively coupled plasma mass spectroscopy/optical emission spectroscopy (ICP-MS/OES). By combining analysis of samples from furnace and pilot scale experiments, the main findings are that Pd-Ni gauzes undergo internal oxidation to nickel(II) oxide (NiO); which in the presence of steam results in Ni depletion and that PtO2 vapour causes severe grain reconstruction. Furthermore, in laboratory-scale experiments no significant Pd loss is observed, which is in contrast to observations from the pilot plant where the samples are exposed to real post-ammonia oxidation conditions. Pd loss is likely attributed to some gas species contained in the real post-ammonia oxidation gas stream.

scholarly journals Optimization of inductively coupled plasma mass spectrometer parameter’s to measuring arsenic and selenium

2012 ◽  
pp. 59-64
Author(s):  
Dávid Andrási ◽  
Anita Puskás-Preszner ◽  
Zsuzsa Tarján ◽  
Béla Kovács ◽  
Zoltán Győri
Keyword(s):  
Signal Intensity ◽  
Inductively Coupled Plasma ◽  
Limit Of Detection ◽  
Marine Biota ◽  
Intake Rate ◽  
High Concentration ◽  
Relative Signal Intensity ◽  
Inductively Coupled ◽  
Icp Ms

In the last decades an increased interest has been evolved about arsenic and selenium. The aim is to understand the environmental, agricultural and biological role of the these elements. In case of arsenic the mayor reasons are the relatively high concentration of arsenic in marine biota (mg kg-1) and the arsenic contaminated drinking waterbases of some Asian countries besides Hungary. The toxicity of higher level selenium content is also known, nevertheless selenium is essential for some biological functions. Considering its esssentiality, in our country the insufficient selenium intake rate couse lack of selenium. Measuring the concentrations of these elements are cruital but not satisfactory information, but the speciation, that is the form of an element presented in a sample is also required. In both cases the most suitable method to determine concentration is the inductively coupled plasma mass spectrimetry. My objective was to optimase the changeable parameters of the ICP-MS for reaching the lowest (the best) detection limit. For this porpuse I have investigated the effect of parameter change on nett signal intensity and relative signal intensity. With the optimased parameter settings the limit of detection for arsenic and selenium were determined, which are 0,032 ng cm-3 for arsenic, and 0,097 ng cm-3 forselenium.

scholarly journals AN IN-SYRINGE La CO-PRECIPITATION METHOD FOR PRE-CONCENTRATION OF OXO-ANIONS FORMING ELEMENTS IN SEAWATER FOLLOWED BY ICP-MS MEASUREMENT

2015 ◽  
Vol 1 (1) ◽  
pp. 8
Author(s):  
Dwinna Rahmi ◽  
Yanbei ZHU ◽  
Eiji Fujimori ◽  
Takuya Hasegawa ◽  
Tomonari Umemura ◽  
...  
Keyword(s):  
Memory Effect ◽  
Inductively Coupled Plasma ◽  
Precipitation Method ◽  
High Concentration ◽  
Lanthanum Hydroxide ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Co Precipitation ◽  
Exchange Resins ◽  
High Level

Vol. 1 No. 1ABSTRACT A lanthanum (La) co-precipitation method was explored for pre-concentration of oxo-anion forming elements followed by measurement with Inductively Coupled Plasma Mass Spectrometry (ICP-MS).  The co-precipitation and subsequent washing and elution steps were performed in a 25 mL-volume syringe in order to save the sample consumption and to avoid the contamination from the experimental environment.  In the present work, various parameters such as the concentration of La added into the sample solution, the pH, aging time, and so on were optimized to obtain good recoveries and analytical detection limits for V, As, Se, Sb, and W.  Generally, in the co-precipitation method, high concentration of precipitant (in this case, La) causes a serious problem of signal memory effect in ICP-MS measurement. To reduce such memory effect, in the present experiment, high level of La was removed by passing the analyte solution (i.e., lanthanum hydroxide dissolved in 1 M HNO3) through a mini column packed with cation-exchange resins.  The method thus obtained was evaluated through the measurement of V, As, Se, Sb and W in seawater reference materials (CASS-4 and NASS-5). The recoveries exceeded 80%, and the observed values were in good agreement with the certified values. Thus, the present method was applied to the determination of trace elements in real seawater sample.    Keywords: Lanthanum, pre-concentration

scholarly journals Does metal porosity affect metal ion release in blood and urine following total hip arthroplasty? A short term study

2018 ◽  
Vol 28 (5) ◽  
pp. 522-530 ◽  
Author(s):  
Alessandro Bistolfi ◽  
Andrea Cimino ◽  
Gwo-Chin Lee ◽  
Riccardo Ferracini ◽  
Giovanni Maina ◽  
...  
Keyword(s):  
Surface Area ◽  
Acetabular Component ◽  
Inductively Coupled Plasma ◽  
Metal Ion ◽  
Titanium Implants ◽  
Ion Release ◽  
Inductively Coupled ◽  
Metal Ion Release ◽  
Metal Levels ◽  
Plasma Mass Spectrometry

Introduction: The surface area of exposed metal in a trabecular-titanium acetabular component is wider compared to traditional-titanium implants. The purpose of this study is to establish if this increase in surface area can lead to a significant increase in systemic metal levels. Methods: 19 patients with conventional acetabular component and 19 with trabecular-titanium cup were compared. Aluminum, Vanadium and Titanium in blood and urine were assessed before surgery and at intervals for 2 years. The samples were analysed using an inductively coupled plasma mass spectrometry. Results: Patients with trabecular-titanium did not have significantly higher metal ion levels compared to patients with conventional cups up to 2 years. A trend over time was statistically significant in both blood and urine for aluminum and titanium concentrations. Conclusions: The three-dimensionality and the wide surface of the trabecular-titanium acetabular component did not affect metal ion release compared to traditional implants after 2 years.

scholarly journals Parameter optimization of an inductively coupled plasma mass spectrometer for measuring arsenic and selenium

2011 ◽  
pp. 81-85
Author(s):  
Dávid Andrási ◽  
Anita Puskás-Preszner ◽  
Zsuzsa Tarján ◽  
Béla Kovács ◽  
Zoltán Győri
Keyword(s):  
Signal Intensity ◽  
Inductively Coupled Plasma ◽  
Marine Biota ◽  
Intake Rate ◽  
High Concentration ◽  
Relative Signal Intensity ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Contaminated Drinking Water

In the last decades, an increased interest has evolved in arsenic and selenium. The aim is to understand the environmental, agricultural and biological roles of these elements. In the case of arsenic, the major reasons are the relatively high concentration of arsenic in marine biota (mg kg-1) and the arsenic contaminated drinking water bases of some Asian countries, as well as Hungary. The toxicity of higher level selenium content is also known; nevertheless, selenium is essential for several biological functions. Considering its essentialness, in our country, the insufficient selenium intake rate causes a lack of selenium. Measuring the concentrations of these elements provides crucial, but unsatisfactory information, as the speciation, i.e. the form of an element presented in a sample is also required.In both cases, the most suitable method to determine concentration is inductively coupled plasma mass spectrometry (ICP-MS). Our objective was to optimize the variable parameters of the ICP-MS to attain the lowest (the best) detection limit. For this purpose, we investigated the effect of parameter change on net signal intensity and relative signal intensity. With the optimized parameter settings, the limits of detection for arsenic and selenium were determined, which are 0,032 ng dm-3 for arsenic, and 0,097 ng dm-3 for selenium. 

scholarly journals Silver Nanoparticles Stable to Oxidation and Silver Ion Release Show Size-Dependent Toxicity In Vivo

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1516
Author(s):  
Brittany Cunningham ◽  
Arek E. Engstrom ◽  
Bryan J. Harper ◽  
Stacey L. Harper ◽  
Marilyn R. Mackiewicz
Keyword(s):  
Silver Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Lipid Membrane ◽  
Surface Oxidation ◽  
Ion Release ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
The Stability

Silver nanoparticles (AgNPs) are widely used in commerce, however, the effect of their physicochemical properties on toxicity remains debatable because of the confounding presence of Ag+ ions. Thus, we designed a series of AgNPs that are stable to surface oxidation and Ag+ ion release. AgNPs were coated with a hybrid lipid membrane comprised of L-phosphatidylcholine (PC), sodium oleate (SOA), and a stoichiometric amount of hexanethiol (HT) to produce oxidant-resistant AgNPs, Ag–SOA–PC–HT. The stability of 7-month aged, 20–100 nm Ag–SOA–PC–HT NPs were assessed using UV–Vis, dynamic light scattering (DLS), and inductively coupled plasma mass spectrometry (ICP-MS), while the toxicity of the nanomaterials was assessed using a well-established, 5-day embryonic zebrafish assay at concentrations ranging from 0–12 mg/L. There was no change in the size of the AgNPs from freshly made samples or 7-month aged samples and minimal Ag+ ion release (<0.2%) in fishwater (FW) up to seven days. Toxicity studies revealed AgNP size- and concentration-dependent effects. Increased mortality and sublethal morphological abnormalities were observed at higher concentrations with smaller nanoparticle sizes. This study, for the first time, determined the effect of AgNP size on toxicity in the absence of Ag+ ions as a confounding variable.

Single Particle Inductively Coupled Plasma Mass Spectrometry: Investigating Nonlinear Response Observed in Pulse Counting Mode and Extending the Linear Dynamic Range by Compensating for Dead Time Related Count Losses on a Microsecond Timescale

2019 ◽  
Author(s):  
Ingo Strenge ◽  
Carsten Engelhard
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Nonlinear Response ◽  
Dynamic Range ◽  
Dead Time ◽  
Inorganic Nanoparticles ◽  
Linear Dynamic Range ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

<p>The article demonstrates the importance of using a suitable approach to compensate for dead time relate count losses (a certain measurement artefact) whenever short, but potentially strong transient signals are to be analysed using inductively coupled plasma mass spectrometry (ICP-MS). Findings strongly support the theory that inadequate time resolution, and therefore insufficient compensation for these count losses, is one of the main reasons for size underestimation observed when analysing inorganic nanoparticles using ICP-MS, a topic still controversially discussed.</p>

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