Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications

Ti and Ti-based alloys are preferred materials in the production of implants in both medical and dental applications. One of the methods that allow the change of biological properties of Ti alloys is the modification of their chemical composition and microstructure. In this study, new biocompatible, nanostructured Ti-x vol% SiO2, Ti-x vol% 45S5 Bioglass, and Ti-x vol% HAp (x=0, 3, 10) materials have been developed, manufactured and studied in terms of their biocompatibility. These materials give the possibility of controlling in detail the grain structure and the composition of the alloy and, consequently, the mechanical and biocompatibility performances. Our results of in vitro studies show that these bionanocomposites have excellent biocompatibility and could integrate with bone. After 1st day of incubation cells show good adhesion to the surface of studied samples in the form of filopodia. After 5 days of incubation, the typical monolayer was observed. With regard to microcrystalline Ti it could help to obtain better dental implants with better mechanical properties and corrosion resistance.

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Mechanical Properties, Corrosion Resistance and Bioactivity of Oxide Layers Formed by Isothermal Oxidation of Ti-6Al-7Nb Alloy

Coatings ◽

10.3390/coatings11050505 ◽

2021 ◽

Vol 11 (5) ◽

pp. 505

Author(s):

Krzysztof Aniołek ◽

Bożena Łosiewicz ◽

Julian Kubisztal ◽

Patrycja Osak ◽

Agnieszka Stróż ◽

...

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Contact Potential Difference ◽

Isothermal Oxidation ◽

Potential Method ◽

Open Circuit ◽

Kelvin Probe ◽

Contact Potential ◽

Oxide Layers

Titanium and its alloys are among the most promising biomaterials for medical applications. In this work, the isothermal oxidation of Ti-6Al-7Nb biomedical alloy towards improving its mechanical properties, corrosion resistance, and bioactivity has been developed. The oxide layers were formed at 600, 700, and 800 °C for 72 h. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), 3D profilometry, and microindentation test, were used to characterize microstructure, surface geometrical structure, and the hardness of the diphase (α + β) Ti-6Al-7Nb alloy after oxidation, respectively. In vitro corrosion resistance tests were carried out in a saline solution at 37 °C using the open-circuit potential method and potentiodynamic measurements. Electronic properties in the air were studied using the Scanning Kelvin Probe (SKP) technique. The bioactivity test was conducted by soaking the alkali- and heat-treated samples in simulated body fluid for 7 days. The presence of apatite was confirmed using SEM/EDS and Fourier Transform Infrared Spectroscopy (FTIR) studies. The thickness of oxide layers formed increased with the temperature growth from 0.25 to 5.48 µm. It was found that with increasing isothermal oxidation temperature, the surface roughness, hardness, corrosion resistance, and contact potential difference increased. The Ti-6Al-7Nb alloy after oxidation revealed the HAp-forming ability in a biological environment.

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Assessment of Mechanical, Chemical, and Biological Properties of Ti-Nb-Zr Alloy for Medical Applications

Materials ◽

10.3390/ma14010126 ◽

2020 ◽

Vol 14 (1) ◽

pp. 126

Author(s):

Viktoria Hoppe ◽

Patrycja Szymczyk-Ziółkowska ◽

Małgorzata Rusińska ◽

Bogdan Dybała ◽

Dominik Poradowski ◽

...

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Base Material ◽

Biological Properties ◽

Β Phase ◽

Alloy Base ◽

Static Tensile ◽

Examination Methods ◽

13Zr Alloy ◽

Dental Applications

The purpose of this work is to obtain comprehensive reference data of the Ti-13Nb-13Zr alloy base material: its microstructure, mechanical, and physicochemical properties. In order to obtain extensive information on the tested materials, a number of examination methods were used, including SEM, XRD, and XPS to determine the phases occurring in the material, while mechanical properties were verified with static tensile, compression, and bending tests. Moreover, the alloy’s corrosion resistance in Ringer’s solution and the cytotoxicity were investigated using the MTT test. Studies have shown that this alloy has the structure α’, α, and β phases, indicating that parts of the β phase transformed to α’, which was confirmed by mechanical properties and the shape of fractures. Due to the good mechanical properties (E = 84.1 GPa), high corrosion resistance, as well as the lack of cytotoxicity on MC3T3 and NHDF cells, this alloy meets the requirements for medical implant materials. Ti-13Nb-13Zr alloy can be successfully used in implants, including bone tissue engineering products and dental applications.

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Characterization of NiCrMo Dental Restoration Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.875.373 ◽

2021 ◽

Vol 875 ◽

pp. 373-378

Author(s):

Ali Haider ◽

Omar Farooq Azam ◽

Muhammad Talha ◽

Saleem Akhtar

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Dental Materials ◽

Dental Restoration ◽

Restorative Material ◽

Nicr Alloy ◽

In Vitro Biocompatibility ◽

Dental Prostheses ◽

Materials Used

Restorative material is a class of dental materials used for direct filling and fabrication of indirect restoration. NiCr alloy is a restorative material frequently used for dental prostheses due to its properties and economic reasons. In present work beryllium free NiCrMo alloy was developed and studied for dental restoration application. The alloy have unique characteristics of resistance to oxidation and biocompatibility; the requisites for dental prostheses. NiCrMo alloy is found to possess mechanical strength and fabrication properties suitable for dental repairs. In this study the developed alloy was tested for its mechanical properties, biocompatibility and corrosion resistance. An in-vitro biocompatibility study was carried out. No signs of toxicity and no signs of cell growth inhibition, in presence of NiCrMo alloy specimen, were observed. Mechanical properties and corrosion resistance are found in the range that is suitable for dental prostheses and easy fabrication.

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Microstructure, mechanical properties, castability and in vitro biocompatibility of Ti–Bi alloys developed for dental applications

Acta Biomaterialia ◽

10.1016/j.actbio.2015.01.009 ◽

2015 ◽

Vol 15 ◽

pp. 254-265 ◽

Cited By ~ 17

Author(s):

K.J. Qiu ◽

Y. Liu ◽

F.Y. Zhou ◽

B.L. Wang ◽

L. Li ◽

...

Keyword(s):

Mechanical Properties ◽

In Vitro Biocompatibility ◽

Dental Applications

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Effects of hydroxyapatite content on mechanical properties and in-vitro corrosion behavior of ZK60/HA composites

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.1515/ijmr-2020-1110802 ◽

2020 ◽

Vol 111 (8) ◽

pp. 621-631

Author(s):

Jie Teng ◽

Zili Xu ◽

Jinlong Su ◽

Yuan Li

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Corrosion Behavior ◽

Electrochemical Measurement ◽

X Ray Diffraction ◽

Corrosion Morphology ◽

Hardness Tests ◽

Zk60 Alloy ◽

Immersion Testing

Abstract In this study, hydroxyapatite-reinforced ZK60 Mg alloybased composites were fabricated via a powder metallurgy route. The mechanical properties of these composites were studied by compressive tests and hardness tests. The in-vitro corrosion behavior was also investigated using immersion testing and electrochemical measurement. The influence of hydroxyapatite content on the mechanical properties and invitro corrosion behavior was evaluated. The microstructure and corrosion morphology were characterized by means of X-ray diffraction, optical and scanning electron microscopy. The results showed that the composite materials with 10 wt.% hydroxyapatite exhibited a better combination of mechanical strength and corrosion resistance. Compared with ZK60 alloy, the addition of 10 wt.% hydroxyapatite resulted in an increase in corrosion resistance by 38.6%.

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Characteristics and Biocompatibility of the Hydroxyapatite Based Two Ternary Biocomposites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.720.130 ◽

2016 ◽

Vol 720 ◽

pp. 130-140

Author(s):

Berrak Bulut ◽

Ziya Engin Erkmen ◽

Eyup Sabri Kayali

Keyword(s):

Mechanical Properties ◽

Physical And Mechanical Properties ◽

Secondary Phase ◽

In Vitro Test ◽

Compression Tests ◽

Vitro Test ◽

Dental Applications ◽

The Ideal

Hydroxyapatite (HA) is a very popular bioceramic for orthopedic and dental applications. Although HA has excellent biocompatibility, its inferior mechanical properties make it unsuitable for load-bearing implant applications. Therefore, HA should be strengthened by a secondary phase for robust mechanical properties. The aim of this study was to compare the properties of HA-Al2O3 (HAC) and HA-ZrO2 (HZC) composites with the addition of 5 and 10 wt% commercial inert glass (CIG); independently. The mixture powders were pressed and then, the pellets were sintered between 1000-1300 °C for 4 hours. Microstructural characterizations were carried out using SEM + EDS and XRD, while hardness and compression tests were done to measure mechanical properties. In order to investigate the biocompatibility behavior of the samples in vitro and in vivo tests were performed. The mechanical properties of HAC composites increased with rising CIG content and increasing sintering temperature. For HZC composites, increasing CIG content caused an elevation in hardness and a decrease in compressive strength values at 1300 °C. The composites having the best physical and mechanical properties also showed improved bioactive properties at in vitro test. In this study, the ideal composite was selected as HZC5 sintered at 1200 °C depending on the microstructure, mechanical and biocompatibility properties.

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Effect of Sandblasting on the Long-Term Corrosion Resistance of Ti G4 in Artificial Saliva

Materials Proceedings ◽

10.3390/cmdwc2021-09985 ◽

2021 ◽

Vol 6 (1) ◽

pp. 5

Author(s):

Patrycja Osak ◽

Maciej Zubko ◽

Julian Kubisztal ◽

Joanna Maszybrocka ◽

Bożena Łosiewicz

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Machine Surface ◽

Electrochemical Impedance ◽

Artificial Saliva ◽

Electron Work Function ◽

Titanium Implants ◽

Bone Contact

Titanium Grade 4 (G4) is the most commonly used material for dental implants due to its excellent biocompatibility and mechanical properties. However, titanium implants require a rough surface that can increase the biomechanical potential of implant–bone contact and affect protein adsorption speed. In this work, the effect of sandblasting of the Ti G4 surface on the long-term corrosion resistance in artificial saliva of pH = 7.4 at 37 °C was studied. The X-ray diffraction (XRD) single-{hkl} sin2ψ method was used to measure the sandblasted Ti residual stress. In vitro corrosion resistance tests were conducted for 21 days using the open circuit potential method, polarization curves, and electrochemical impedance spectroscopy. Using the Kelvin scanning probe, the electron work function was determined. Analysis of the obtained results showed an improvement in the corrosion resistance of the sandblasted Ti G4 compared to Ti with the machine surface. The increase in corrosion resistance was related to the residual compressive stress of 324.7 MPa present in the sandblasted Ti surface. Sandblasting caused plastic deformation of the Ti surface, which resulted in the improvement in mechanical properties, as evidenced by the increase in the hardness of the sandblasted Ti compared to Ti with the machine surface.

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Influence of the Embedding Media on the Results of Standard In Vitro Fatigue Tests on the Femoral Components

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1243/pime_proc_1994_208_278_02 ◽

1994 ◽

Vol 208 (3) ◽

pp. 131-137 ◽

Cited By ~ 3

Author(s):

M Viceconti ◽

A Toni ◽

A Giunti

Keyword(s):

Mechanical Properties ◽

Stress Analysis ◽

Mechanical Tests ◽

Fatigue Tests ◽

Strain Gauges ◽

Static Properties ◽

Static Mechanical ◽

Hip Stems ◽

Dental Applications

The aim of the present investigation was to determine the effects of the embedding material mechanical properties on the in vitro fatigue endurance of femoral hip stems as determined following ISO standards. Acrylic cements are usually employed as embedding media; due to the high cost of surgical cements, acrylic cements for dental applications are commonly used. Two acrylic cements for dental applications were tested to determine their static mechanical properties and compared with those found for three surgical cements. The same two dental cements were also compared as embedding media in a series of ISO 7206/3 fatigue tests on a mini-size Cr-Co stem; prosthesis stress analysis using strain gauges was also performed. The mechanical tests on the different cements showed that behind the definition of acrylic cement are materials with considerably different mechanical static properties. The fatigue campaign confirmed the influence of embedding media on the results obtained from the ISO 7206/3 fatigue test. Under a load of 4200 N the stem failed after four million cycles when using one cement; it did not fail after ten million cycles when using another cement. Stress analysis with strain gauges substantially confirmed these findings.

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