EIS study of porous NiTi biomedical alloy in simulated body fluid

Attarchi, Mehdi; Mazloumi, Mahyar; Behckam, Isar; Sadrnezhaad, S.K.

doi:10.1002/maco.200905212

Cited by 12 publications

(9 citation statements)

References 23 publications

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“…12c). This means that the anodization in nickel sulfate containing 0.5 M sulfuric acid does not prevent the precipitation of crystalline TiO 2 over the porous surface [35]. On the other hand, Fig.…”

Section: Morphology Of the Anodized Film In Nickel Sulfate And Anodizmentioning

confidence: 91%

Improvement in corrosion resistance of commercial pure titanium for the enhancement of its biocompatibility

Mohsen

Fadlallah

2011

Materials & Corrosion

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A new surface modification protocol encompassing an anodization treatment has been developed to improve the surface properties of biomedical titanium. Anodization in presence of nickel sulfate is one of a good way to improve the resistance of commercial pure titanium (cp-Ti) in phosphate saline buffer solution (PSB). The potentiostatic behavior of anodized titanium in sulfuric acid with nickel sulfate differed markedly from that of titanium anodized in sulfuric acid free from nickel sulfate. Polarization and electrochemical impedance spectroscopy (EIS) recorded an increase in the corrosion resistance of the passive film. Scanning electron microscopy (SEM) and energy diffraction X-ray (EDX) analysis were used to investigate the morphology and structure of the anodized film in absence and in presence of nickel sulfate. On the other hand, sealed anodized titanium samples exposed to PSB for up to 3 days have been studied by EIS to obtain detailed information concerning the electrochemical properties of sealed anodized titanium. An equivalent circuit that reproduces the impedance results of porous cp-Ti oxide (TiO 2 ) films is proposed. These observations indicate that anodization of cp-Ti in presence of nickel sulfate and sealing the anodized film can serve as a simple low-temperature method to enhance the corrosion resistance of cp-Ti when used as an implant material.

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Section: Morphology Of the Anodized Film In Nickel Sulfate And Anodizmentioning

confidence: 91%

Improvement in corrosion resistance of commercial pure titanium for the enhancement of its biocompatibility

Mohsen

Fadlallah

2011

Materials & Corrosion

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“…Conflicting conclusions have been reported for corrosion resistance of NiTi samples [2,3]. Such controversies may be attributed to the surface characteristics of the samples in the experiments [3,4], and also to the differences in its performance requirements in various conditions [3]. However, views regarding to the corrosion resistance of NiTi in medical applications are more conservative [2,3], mainly because NiTi has a high content of Ni.…”

Section: Introductionmentioning

confidence: 90%

Corrosion behavior of polypyrrole/hydroxyapatite nanocomposite thin films electropolymerized on NiTi substrates in simulated body fluid

Torabi

Sadrnezhaad

2011

Materials & Corrosion

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Hydroxyapatite (HAp) nanoparticles synthesized via microwave irradiation. Polypyrrole (PPy)/HAp nanocomposite was obtained using electropolymerization on nitinol (Ni) titanium (Ti) substrates. Fourier transform infrared was employed to characterize the nanocomposite formation. Electrochemical properties of the nanocomposite were investigated using polarization and electrochemical impedance spectroscopy (EIS) in simulated body fluid (SBF, 37 AE 0.1 8C). It was concluded that the NiTi specimen coated with PPy/HAp nanocomposite, has higher corrosion resistance than the NiTi coated with pure PPy in the SBF; however, NiTi was better than both coated NiTi. EIS results confirmed corrosion properties. Also, EIS was used to predict the morphology of the coatings. It predicted fine and compact morphology of the nanocomposite that was confirmed using scanning electron microscopy.

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“…Surface modification is advisable for enhancement of biocompatibility and bioactivity in some cases. Surface oxidation reduces the chance of corrosion and assures long-term survival [59]. Shot-peening is another example which creates a compression stressed layer with nano-size structure [60].…”

Section: Bio Compatibility and Corrosion Resistancementioning

confidence: 99%

Nitinol Spinal Vertebrae: A Favorable New Substitute

Sadrnezhaad

Parsafar

Rashtiani

et al. 2019

IJE

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A B S T R A C TScoliosis, kyphosis, and bone fracture are health problems, especially of the elderly throughout the world. The vertebra protects the spinal cord. Any impairment to the vertebra can lead to pain and nervousness. Ni-Ti alloy (Nitinol) helps to resolve the problem by fulfilling such requirements as for strength, durability, resistance to wear, and shockwave damping which is due to the shape memory effect. Nitinol medical applications have so far been restricted to surgical devices and orthopaedics. Little has been said about Nitinol use for medication of the spinal vertebra disorder. This article appraises the potential features of Nitinol for vertebral implantation and therapeutic prescription consistent with the specific anatomical variation. Staples, screws, cages, stents, and posterior-stabilizers made of Nitinol have passed in-vitro tests and in some cases in-vivo examinations. Using anatomically tailored Nitinol for treatment and administration of the damaged vertebra is proposed as a forecastable dream.

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EIS study of porous NiTi biomedical alloy in simulated body fluid

Cited by 12 publications

References 23 publications

Improvement in corrosion resistance of commercial pure titanium for the enhancement of its biocompatibility

Improvement in corrosion resistance of commercial pure titanium for the enhancement of its biocompatibility

Corrosion behavior of polypyrrole/hydroxyapatite nanocomposite thin films electropolymerized on NiTi substrates in simulated body fluid

Nitinol Spinal Vertebrae: A Favorable New Substitute

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