Effect of Fluoride on the Corrosion Behavior of Ti and Ti6Al4V Dental Implants Coupled With Different Superstructures

2011 ◽  
Vol 37 (3) ◽  
pp. 309-317 ◽  
Author(s):  
Eman M Anwar ◽  
Lamia S Kheiralla ◽  
Riham H Tammam
Keyword(s):  
Corrosion Resistance ◽  
Dental Implants ◽  
Corrosion Behavior ◽  
Artificial Saliva ◽  
Fluoride Concentration ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
All Ceramic ◽  
Metal Ceramic ◽  
Implant Alloys

Abstract The effect of fluoride ion concentration on the corrosion behavior of Ti and Ti6Al4V implant alloys, when coupled with either metal/ceramic or all-ceramic superstructure, was examined by different electrochemical methods in artificial saliva solutions. It was concluded that increased fluoride concentration leads to a decrease in the corrosion resistance of all tested couples. The type of the superstructure also showed a significant effect on the corrosion resistance of the couple.

scholarly journals Application of Plasma Electrolytic Oxidation Coating on Powder Metallurgy Ti-6Al-4V for Dental Implants

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1167
Author(s):  
Cristina Garcia-Cabezón ◽  
María Luz Rodriguez-Mendez ◽  
Vicente Amigo Borrás ◽  
Bayon Raquel ◽  
Jose Carlos Rodriguez Cabello ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
Dental Implants ◽  
Corrosion Behavior ◽  
Plasma Electrolytic Oxidation ◽  
Artificial Saliva ◽  
Biological Properties ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings

Ti-6Al-4V alloy obtained by powder metallurgy (PM) is a good candidate biomaterial in the manufacture of dental implants but its inherent porosity makes it have worse corrosion behavior than conventionally obtained alloys. In order to improve the corrosion and biological properties, surface modification technologies could be used. The plasma electrolytic oxidation (PEO) process is a novelty process successfully used in case of conventional titanium alloys. The present work investigates the effect of PEO treatment on PM Ti-6Al-4V alloy using two electrolytes. Both coatings show good adherence and improved corrosion behavior in artificial saliva, the PEO coatings delivers a steady growth of corrosion resistance from day one until 90 days immersion. Highest corrosion resistance was shown in case of Ca/P enrichment PEO coatings. The cytocompatibility tests indicated these coatings seem to be appropriate to improve the bone osseointegration with proper porosity index.

scholarly journals Chemical Composition and Corrosion Behavior of a-C:H/DLC Film-Coated Titanium Substrate in Simulated PEMFC Environment

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 820
Author(s):  
Beibei Han ◽  
Mengyuan Yan ◽  
Dongying Ju ◽  
Maorong Chai ◽  
Susumu Sato
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Metal Ion ◽  
Ion Beam ◽  
Titanium Substrate ◽  
Corrosion Current ◽  
Ion Concentration ◽  
Bipolar Plates ◽  
High Adhesion ◽  
Corrosion Behaviors

The amorphous hydrogenated (a-C:H) film-coated titanium, using different CH4/H2 and deposition times, was prepared by the ion beam deposition (IBD) method, which has the advantage of high adhesion because of the graded interface mixes at the atomic level. The chemical characterizations and corrosion behaviors of a-C:H film were investigated and evaluated by SEM, AFM, Raman spectroscopy, EPMA, TEM and XPS. An a-C:H film-coated titanium was corroded at 0.8 V, 90 °C in a 0.5 mol/L H2SO4 solution for 168 h. The metal ion concentration in the H2SO4 corrosion solution and the potentiodynamic polarization behavior were evaluated. Results indicate that a higher CH4/H2 of 1:0 and a deposition time of 12 h can result in a minimum ID/IG ratio of 0.827, Ra of 5.76 nm, metal ion concentration of 0.34 ppm in the corrosion solution and a corrosion current of 0.23 µA/cm2. The current density in this work meets the DOE’s 2020 target of 1 µA/cm2. Electrical conductivity is inversely proportional to the corrosion resistance. The significant improvement in the corrosion resistance of the a-C:H film was mainly attributed to the increased sp3 element and nanocrystalline TiC phase in the penetration layer. As a result, the a-C:H film-coated titanium at CH4/H2 = 1:0 with improved anti-corrosion behavior creates a great potential for PEMFC bipolar plates.

scholarly journals Assessment of nickel titanium and beta titanium corrosion resistance behavior in fluoride and chloride environments

2013 ◽  
Vol 83 (5) ◽  
pp. 864-869 ◽  
Author(s):  
Elisa J. Kassab ◽  
José Ponciano Gomes
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Fluoride Concentration ◽  
Nickel Titanium ◽  
Localized Corrosion ◽  
General Corrosion ◽  
Nacl Solution ◽  
Galvanic Coupling ◽  
Beta Titanium

ABSTRACT Objective: To assess the influence of fluoride concentration on the corrosion behavior of nickel titanium (NiTi) superelastic wire and to compare the corrosion resistance of NiTi with that of beta titanium alloy in physiological solution with and without addition of fluoride. Materials and Methods: NiTi corrosion resistance was investigated through electrochemical impedance spectroscopy and anodic polarization in sodium chloride (NaCl 0.15 M) with and without addition of 0.02 M sodium fluoride (NaF), and the results were compared with those associated with beta titanium. The influence of fluoride concentration on NiTi corrosion behavior was assessed in NaCl (0.15 M) with and without 0.02, 0.04, 0.05, 0.07, and 0.12 M NaF solution. Galvanic corrosion between NiTi and beta titanium were investigated. All samples were characterized by scanning electron microscopy. Results: Polarization resistance decreased when NaF concentration was increased, and, depending on NaF concentration, NiTi can suffer localized or generalized corrosion. In NaCl solution with 0.02 M NaF, NiTi suffer localized corrosion, while beta titanium alloys remained passive. Current values near zero were observed by galvanic coupling of NiTi and beta titanium. Conclusions: There is a decrease in NiTi corrosion resistance in the presence of fluoride. The corrosion behavior of NiTi alloy depends on fluoride concentration. When 0.02 and 0.04 M of NaF were added to the NaCl solution, NiTi presented localized corrosion. When NaF concentration increased to 0.05, 0.07, and 0.12 M, the alloy presented general corrosion. NiTi corrosion resistance behavior is lower than that of beta titanium. Galvanic coupling of these alloys does not increase corrosion rates.

scholarly journals Comparison of the Fluoride Release of Silver Diamine Fluoride, Fluoride Varnish, Acidulated Phosphate Fluoride Gel on Extracted Teeth over Various Time Intervals in Artificial Saliva

2021 ◽  
pp. 55-63
Author(s):  
Taniya Thakur ◽  
Pratik Kumar Lahiri ◽  
Madhumanti Karmakar ◽  
Bhumi Sarvaiya ◽  
Piyali Datta ◽  
...  
Keyword(s):  
Tap Water ◽  
Artificial Saliva ◽  
Fluoride Concentration ◽  
Maximum Amount ◽  
Fluoride Varnish ◽  
Fluoride Ion ◽  
Fluoride Release ◽  
Silver Diamine Fluoride ◽  
Group 4 ◽  
Group 2

Silver Diamine Fluoride (SDF) has been documented to effectively arrest dental caries and reduce dental hypersensitivity. SDF promotes remineralization and harden the carious lesion. SDF increases fluoride concentration in saliva and increase the bioavailability of fluoride in saliva. After SDF application, fluoride ion promotes remineralization and silver ion is available for antimicrobial action. Aim: The study aims to determine and compare the amount of fluoride released from various fluoride releasing materials in artificial saliva after 24 hours, 7th day and 14th day of the study. Materials and Methods: 96 premolars free of any caries, fractures, or any other defects were sterilized in 10% formalin for 2 weeks. Then they were rinsed in tap water to remove any fixative from its surface and then stored in deionised distilled water for a period of 30 days prior to testing. Tooth samples were divided into four groups- Group 1: 38% SDF, Group 2: 1.23% APF gel, Group 3: Fluoride varnish and Group 4: Control. All the teeth specimens were blot dried and subjected to their respective material. Fluoride release was analysed using a Fluoride ion-selective electrode after 24 hours, 7days and 14 days of suspension in artificial saliva. Results: Mann-Whitney U Test for inter-group comparison was used for statistical evaluation. 24 Hours fluoride release: The maximum amount of fluoride was released from Fluoride Varnish followed by SDF then APF Gel and least by artificial saliva alone (control) (p<0.001). 7th Day fluoride release: The maximum amount of fluoride was released from SDF followed by Fluoride Varnish then APF Gel and least by artificial saliva alone (control) (p<0.001). 14th Day fluoride release: The maximum amount of fluoride was released from Fluoride Varnish followed by SDF then APF Gel and least by artificial saliva alone (control) (p<0.001).

Electrochemical Behaviour of Titanium Based Biomaterials in Artificial Saliva

2017 ◽  
Vol 68 (2) ◽  
pp. 396-400
Author(s):  
Kamel Earar ◽  
Camelia Ana Grigore ◽  
Cristian Budacu ◽  
Lucia Carmen Trinca ◽  
Daniel Mareci ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behaviour ◽  
Layer Structure ◽  
Artificial Saliva ◽  
Electrochemical Behaviour ◽  
Grain Structure ◽  
Electrochemical Degradation ◽  
Nitrogen Diffusion ◽  
Implant Alloys ◽  
Modular Component

In the last decade, new titanium alloys such as Ti6Al7Nb and Ti6Al7NbN have been developed in different areas of dentistry. It is known that mechanical/electrochemical interactions accelerate corrosion in implant alloys, and these interactions can be reduced by improving the modular component machining tolerances or by improving the corrosion resistance. The aim of this study was to compare the Ti6Al7Nb and Ti6Al7NbN alloys corrosion resistance in AFNOR artificial saliva. Due to the nitrogen diffusion, the Ti6Al7NbN alloy presents more pronounced grain structure than Ti6Al7Nb. In the electrochemical estimations the polarisation data were converted into instantaneous corrosion rate values (jcorr). The obtained passivation properties were comparable for both alloys. The EIS spectra were best fitted using an equivalent circuit (EC) which was consistent with the model of a two-layer structure for the passive film. The electrochemical and corrosion behaviour of Ti6Al7NbN increased the occurrence of the implant alloy�s electrochemical degradation.

Assessment of Corrosion Behavior in Artificial Saliva of Wires for Orthodontic Applications

2018 ◽  
Vol 917 ◽  
pp. 197-201
Author(s):  
Aphinan Phukaoluan ◽  
Anak Khantachawana ◽  
Pongpan Kaewtatip ◽  
Surachai Dechkunakorn
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Artificial Saliva ◽  
Open Circuit ◽  
Vacuum Arc ◽  
Orthodontic Wires ◽  
Protective Oxide ◽  
Arc Melting ◽  
Protective Oxide Film ◽  
Significant Difference

The aim of this study, the corrosion behavior of TiNiCu in artificial saliva (pH5.35) at 37°C was assessed by the use of electrochemical methods. Ti50Ni43Cu7 (at%) used in this study were made from ingots prepared by the vacuum arc melting (VAM) method. The furnace was purged with argon gas during melting. All melted ingots were then homogenized at 800°C for 3.6 ks. Open circuit potential (OCP) was monitored at 3.6 ks followed by potentiodynamic techniques. The results showed that all chemical composition of orthodontic wires by EPMA were Ti, Ni, Cu, Cr, Fe and Mn. Surface roughness was measured in order to ensure that TiNiCu and SS was significant difference which might affect corrosion resistance. It was seen that TiNiCu orthodontic wires, presented a good corrosion resistance, compared to the stainless steel, probably due to the formation of a protective oxide film mainly constituted by titanium oxide.

Electrochemical Corrosion Behavior of Dental/Implant Alloys in Artificial Saliva

2008 ◽  
Vol 17 (5) ◽  
pp. 695-701 ◽  
Author(s):  
Mohit Sharma ◽  
A.V. Ramesh Kumar ◽  
Nirbhay Singh ◽  
Nidhi Adya ◽  
Bobin Saluja
Keyword(s):  
Dental Implant ◽  
Corrosion Behavior ◽  
Artificial Saliva ◽  
Electrochemical Corrosion ◽  
Electrochemical Corrosion Behavior ◽  
Implant Alloys
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