scholarly journals Effect of Temperature on Electrochemically Assisted Deposition and Bioactivity of CaP Coatings on CpTi Grade 4

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5081
Author(s):  
Bożena Łosiewicz ◽  
Patrycja Osak ◽  
Joanna Maszybrocka ◽  
Julian Kubisztal ◽  
Sylwia Bogunia ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Pure Titanium ◽  
Current Method ◽  
Physicochemical Characteristics ◽  
Effect Of Temperature ◽  
Apatite Formation ◽  
Commercially Pure Titanium ◽  
Eddy Current Method ◽  
Titanium Grade ◽  
Increasing Function

Calcium phosphate (CaP) coatings are able to improve the osseointegration process due to their chemical composition similar to that of bone tissues. Among the methods of producing CaP coatings, the electrochemically assisted deposition (ECAD) is particularly important due to high repeatability and the possibility of deposition at room temperature and neutral pH, which allows for the co-deposition of inorganic and organic components. In this work, the ECAD of CaP coatings from an acetate bath with a Ca:P ratio of 1.67, was developed. The effect of the ECAD conditions on CaP coatings deposited on commercially pure titanium grade 4 (CpTi G4) subjected to sandblasting and autoclaving was presented. The physicochemical characteristics of the ECAD-derived coatings was carried out using SEM, EDS, FTIR, 2D roughness profiles, and amplitude sensitive eddy current method. It was showed that amorphous calcium phosphate (ACP) coatings can be obtained at a potential −1.5 to −10 V for 10 to 60 min at 20 to 70 °C. The thickness and surface roughness of the ACP coatings were an increasing function of potential, time, and temperature. The obtained ACP coatings are a precursor in the process of apatite formation in a simulated body fluid. The optimal ACP coating for use in dentistry was deposited at a potential of −3 V for 30 min at 20 °C.

Calcium Phosphate Films Coated on Titanium by RF Magnetron Sputtering for Medical Applications

2007 ◽  
Vol 539-543 ◽  
pp. 551-556 ◽  
Author(s):  
Takayuki Narushima ◽  
Kyosuke Ueda ◽  
Takashi Goto ◽  
Tomoyuki Katsube ◽  
Hiroshi Kawamura ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Calcium Ion ◽  
Pure Titanium ◽  
Rf Magnetron Sputtering ◽  
Titanium Implants ◽  
Apatite Formation ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Titanium Substrates

Calcium phosphate films were coated on commercially pure titanium substrates by radiofrequency magnetron sputtering using β-tricalcium phosphate targets. The films consisted of amorphous calcium phosphate and oxyapatite phases. Immersion tests of the films were carried out in Hanks’ solution and PBS(-), and apatite formation and calcium ion elution from the films were investigated. The titanium cylinders coated with calcium phosphate films were implanted into the mandibles of beagle dogs. These results suggest that coating with calcium phosphate improves the biocompatibility of titanium implants with bone tissue.

UPM CP TITANIUM GRADE 3 (UNS R50550)

Alloy Digest ◽  
2020 ◽  
Vol 69 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Pure Titanium ◽  
Heat Treating ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Continuous Service ◽  
Pure Grade ◽  
Grade 3 ◽  
Titanium Grade ◽  
Design Stress

Abstract UPM CP Titanium Grade 3 (UNS R50550) is an unalloyed commercially pure titanium that exhibits moderate strength (higher strength than that of Titanium Grade 2), along with excellent formability and corrosion resistance. It offers the highest ASME allowable design stress of any commercially pure grade of titanium, and can be used in continuous service up to 425 °C (800 °F) and in intermittent service up to 540 °C (1000 °F). This datasheet provides information on composition, physical properties, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-167. Producer or source: United Performance Metals.

Homogeneity of Bulk Nanostructured Titanium Obtained by Hydrostatic Extrusion

2011 ◽  
Vol 674 ◽  
pp. 47-51 ◽  
Author(s):  
Krzysztof Topolski ◽  
Halina Garbacz ◽  
Wacław Pachla ◽  
Krzysztof J. Kurzydlowski
Keyword(s):  
Grain Size ◽  
Pure Titanium ◽  
Hydrostatic Extrusion ◽  
Equivalent Diameter ◽  
Commercially Pure Titanium ◽  
Average Grain Size ◽  
Size Diversity ◽  
Titanium Grade ◽  
Bulk Nanocrystalline ◽  
Nano Grains

The aim of this study was to investigate the homogeneity of the bulk nanocrystalline titanium rods obtained by Hydrostatic Extrusion (HE). The investigated material was commercially pure titanium grade 2. The final products of extrusion were nanocrystalline rods with diameters of 7 and 10 mm and lengths of about 250 mm. The size and shape of the grains were examined on transverse sections using transmission electron microscopy (TEM). The grain size was determined by the average grain equivalent diameter d2. The grain size diversity was quantified in terms of the equivalent diameter coefficient of variation CV (d2). The samples for the microscopic analyses were cut from various regions of the rods i.e. top, end, centre, and from surface of the rods. In all the samples, the average grain size determined on transverse sections was about 70 nm and the nano-grains in the various regions of the rods were similar in the shape. The examinations demonstrated that the nanostructure of the extruded rods was homogeneous. This observation was confirmed by the results of microhardness measurements.

scholarly journals The Effects Of Friction On Stamping Process Of Sheet Metals Used In Aviation

2015 ◽  
Vol 60 (3) ◽  
pp. 1895-1900 ◽  
Author(s):  
K. Dyja ◽  
W. Więckowski
Keyword(s):  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Spherical Cap ◽  
Drawing Test ◽  
Commercially Pure ◽  
Stamping Process ◽  
Strip Drawing ◽  
Titanium Grade ◽  
The Impact ◽  
Lubrication Conditions

Abstract An important factor in the possibility of obtaining correct drawn parts with the desired functional properties is the friction between the stamped sheet and the tool. The article discusses the impact of technological lubricants developed according to our own formulas, based on vegetable oils, on the stamping process taking into account the strain distributions in the drawn parts. Biodegradable lubricants based on rapeseed oil with an addition of stearic acid or boric acid were used. The results of the friction coefficient in a strip drawing test and the numerical analysis results of the stamping process of a spherical cap from sheet metal: aluminium 2024, commercially pure titanium Grade 2, steel 5604 in dry friction and lubrication conditions, are presented. Strain distributions and changes in the drawn part wall thickness were analysed.

Pack Cementation Treatment of Titanium Using Tetracalcium Phosphate Powder for Biomedical Applications

2010 ◽  
Vol 654-656 ◽  
pp. 2172-2175
Author(s):  
Kyosuke Ueda ◽  
Hajime Suto ◽  
Kaori Nakaie ◽  
Takayuki Narushima
Keyword(s):  
Reaction Layer ◽  
Biomedical Applications ◽  
Pure Titanium ◽  
Pack Cementation ◽  
Apatite Formation ◽  
Commercially Pure Titanium ◽  
Tetracalcium Phosphate ◽  
Phosphate Powder ◽  
Commercially Pure ◽  
Cp Ti

The surface modification of commercially pure titanium (CP Ti) by pack cementation treatment at 973 K using tetracalcium phosphate (Ca4(PO4)2O, TTCP) slurry was investigated. An HAp phase and a CaTiO3 phase were observed on the reaction layer of the CP Ti substrate after pack cementation treatment at 973 K for 86.4 ks. TTCP powder decomposed to HAp and CaO, and CaO reacted with TiO2 to form CaTiO3. The reaction layer on the CP Ti substrate consisted of inner and outer layers and the particles were in the outer reaction layer. The pores observed on the reaction layer were formed by the detachment of particles from the outer layer. The bonding strength of the reaction layer was 68.1 MPa. Apatite completely covered the surface of the pack-cementation-treated CP Ti after immersion in Kokubo solution for 21.6 ks; such rapid apatite formation suggests that pack cementation treatment improves the biocompatibility of titanium.

Photocatalytic activity and antibacterial efficacy of UVA-treated titanium oxides

2020 ◽  
Vol 35 (4-5) ◽  
pp. 500-514
Author(s):  
Haden Andrew Johnson ◽  
Randall Scott Williamson ◽  
Mary Marquart ◽  
Joel David Bumgardner ◽  
Amol V Janorkar ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Pure Titanium ◽  
Antimicrobial Properties ◽  
Bacterial Attachment ◽  
Mixed Phase ◽  
Titanium Oxides ◽  
Commercially Pure Titanium ◽  
Mixed Acid ◽  
Uva Irradiation ◽  
Titanium Grade

Studies have shown ultraviolet-A (UVA) irradiation of crystalline titanium oxides leads to the production of reactive oxygen species (ROS) via a photocatalytic process. The ROS exhibit antimicrobial properties that may be of benefit in preventing bacterial attachment to implant devices. Recent studies have suggested a potential benefit of mixed anatase and rutile oxides and dopants on the photocatalytic properties of titanium oxides. The goal of this work was to compare the photocatalytic activity of different anodized commercially pure titanium grade 4 (CPTi4) surfaces. CPTi4 specimens were anodized in three mixed-acid electrolytes to create crystalline oxide surfaces that were either primarily anatase, primarily rutile, or a combination of anatase and rutile. Additionally, the primarily anatase and combination oxides incorporated some phosphorous from the phosphoric acid component in the electrolyte. The photocatalytic activity of the anodized specimens was measured using both methylene blue (MB) degradation assay and comparing the attachment of S. aureus under irradiation with UVA light of differing intensities (1 mW/cm2, 8 mW/cm2, and 23 mW/cm2). Primarily rutile oxides exhibited significantly higher levels of MB degradation after exposure to 1 mW/cm2 UVA lights. Primarily rutile specimens also had the largest reduction in bacterial attachment followed by the mixed phase specimens and the primarily anatase specimens at 1 mW/cm2 UVA lights. Phosphorous-doped, mixed phase oxides exhibited an accelerated MB degradation response during exposure to 8 mW/cm2 and 23 mW/cm2 UVA lights. All anodized and unanodized CPTi4 groups revealed similar S. aureus attachment at the two higher UVA intensities. Although MB degradation assay and the bacteria attachment assay both confirmed photocatalytic activity of the oxides formed in this study, the results of the MB degradation assay did not accurately predict the oxides performance against S. aureus.

scholarly journals Thromboinflammation as bioactivity assessment of H2O2-alkali modified titanium surfaces

2019 ◽  
Vol 30 (6) ◽  
Author(s):  
Gry Hulsart-Billström ◽  
Oscar Janson ◽  
Håkan Engqvist ◽  
Ken Welch ◽  
Jaan Hong
Keyword(s):  
Platelet Aggregation ◽  
Complement Activation ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Coagulation Activation ◽  
Commercially Pure ◽  
A Cell ◽  
Modified Surface ◽  
Titanium Surfaces ◽  
Titanium Grade

Abstract The release of growth factors from platelets, mediated by the coagulation and the complement system, plays an important role in the bone formation around implants. This study aimed at exploring the thromboinflammatory response of H2O2-alkali soaked commercially pure titanium grade 2 discs exposed to whole human blood, as a way to assess the bioactivity of the discs. Commercially pure titanium grade 2 discs were modified by soaking in H2O2, NaOH and Ca(OH)2. The platelet aggregation, coagulation activation and complement activation was assessed by exposing the discs to fresh whole blood from human donors. The platelet aggregation was examined by a cell counter and the coagulation and complement activation were assessed by ELISA-measurements of the concentration of thrombin-antithrombin complex, C3a and terminal complement complex. The modified surface showed a statistically significant increased platelet aggregation, coagulation activation and complement activation compared to unexposed blood. The surface also showed a statistically significant increase of coagulation activation compared to PVC. The results of this study showed that the H2O2-alkali soaked surfaces induced a thromboinflammatory response that indicates that the surfaces are bioactive.

scholarly journals Reality of Dental Implant Surface Modification: A Short Literature Review

2014 ◽  
Vol 8 (1) ◽  
pp. 114-119 ◽  
Author(s):  
In-Sung Yeo
Keyword(s):  
Calcium Phosphate ◽  
Titanium Surface ◽  
Pure Titanium ◽  
Acid Etching ◽  
Commercially Pure Titanium ◽  
Fluoride Treatment ◽  
Commercially Pure ◽  
Modified Surfaces

Screw-shaped endosseous implants that have a turned surface of commercially pure titanium have a disadvantage of requiring a long time for osseointegration while those implants have shown long-term clinical success in single and multiple restorations. Titanium implant surfaces have been modified in various ways to improve biocompatibility and accelerate osseointegration, which results in a shorter edentulous period for a patient. This article reviewed some important modified titanium surfaces, exploring the in vitro, in vivo and clinical results that numerous comparison studies reported. Several methods are widely used to modify the topography or chemistry of titanium surface, including blasting, acid etching, anodic oxidation, fluoride treatment, and calcium phosphate coating. Such modified surfaces demonstrate faster and stronger osseointegration than the turned commercially pure titanium surface. However, there have been many studies finding no significant differences in in vivo bone responses among the modified surfaces. Considering those in vivo results, physical properties like roughening by sandblasting and acid etching may be major contributors to favorable bone response in biological environments over chemical properties obtained from various modifications including fluoride treatment and calcium phosphate application. Recently, hydrophilic properties added to the roughened surfaces or some osteogenic peptides coated on the surfaces have shown higher biocompatibility and have induced faster osseointegration, compared to the existing modified surfaces. However, the long-term clinical studies about those innovative surfaces are still lacking.

Evaluation of Elastic Properties of CP Ti by Three Different Techniques

2015 ◽  
Vol 830-831 ◽  
pp. 195-198
Author(s):  
K. Saravanan ◽  
Bhal Sumit ◽  
P.L. Nithilaksh ◽  
P. Ramesh Narayanan
Keyword(s):  
Elastic Constants ◽  
Pure Titanium ◽  
Ultrasonic Pulse ◽  
Test Methods ◽  
Stressed Condition ◽  
Commercially Pure Titanium ◽  
Static Tensile ◽  
Titanium Grade ◽  
Cp Ti ◽  
Pulse Echo

Elastic constants are the fundamental key parameters in the mechanical behaviour of engineering materials under stressed condition. This paper explains the determination of elastic constants of commercially pure titanium (Grade-2) at ambient temperature using three independent test methods including quasi-static tensile test with strain gauged specimen, ultrasonic pulse echo method and resonance based impulse excitation technique. The results are statistically analysed and compared.

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