The effects of surface processing on in-vivo corrosion of Nitinol stents in a porcine model

Sullivan, Stacey J. L.; Madamba, Daniel; Sivan, Shiril; Miyashiro, Katie; Dreher, Maureen L.; Trépanier, Christine; Nagaraja, Srinidhi

doi:10.1016/j.actbio.2017.08.029

Cited by 29 publications

(22 citation statements)

References 45 publications

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“…Figure 22 shows two examples of pitting corrosion in vivo. Figure 22a shows micro-pitting on an oxidized tubing (OT) Nitinol stent after six months implantation into the iliac artery of a minipig [283]. Figure 22b shows the surface of a Mg–Y–Ca–Zr WX11 alloy in the as-cast condition after potentiodynamic polarization test in Dulbecco’s Modified Eagle Medium (DMEM) with 10% FBS at 37 °C and cleaning with CrO 3 /AgNO 3 solution to remove the corrosion products.…”

Section: Mechanisms Of Corrosion In Vivomentioning

confidence: 99%

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Corrosion of Metallic Biomaterials: A Review

2019

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Metallic biomaterials are used in medical devices in humans more than any other family of materials. The corrosion resistance of an implant material affects its functionality and durability and is a prime factor governing biocompatibility. The fundamental paradigm of metallic biomaterials, except biodegradable metals, has been “the more corrosion resistant, the more biocompatible.” The body environment is harsh and raises several challenges with respect to corrosion control. In this invited review paper, the body environment is analysed in detail and the possible effects of the corrosion of different biomaterials on biocompatibility are discussed. Then, the kinetics of corrosion, passivity, its breakdown and regeneration in vivo are conferred. Next, the mostly used metallic biomaterials and their corrosion performance are reviewed. These biomaterials include stainless steels, cobalt-chromium alloys, titanium and its alloys, Nitinol shape memory alloy, dental amalgams, gold, metallic glasses and biodegradable metals. Then, the principles of implant failure, retrieval and failure analysis are highlighted, followed by description of the most common corrosion processes in vivo. Finally, approaches to control the corrosion of metallic biomaterials are highlighted.

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Section: Mechanisms Of Corrosion In Vivomentioning

confidence: 99%

“…Pitting corrosion. ( a ) An oxidized tubing Nitinol stent after six months implantation into the iliac artery of a minipig [283]. ( b ) A Mg–Y–Ca–Zr WX11 alloy in the as-cast condition following potentiodynamic polarization test in DMEM with 10% FBS at 37 °C and cleaning with CrO 3 /AgNO 3 solution [284].…”

Section: Figurementioning

confidence: 99%

Corrosion of Metallic Biomaterials: A Review

2019

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“…Pértile et al in fact suggested, on the basis of in vivo E corr values, that nitinol should not be susceptible to breakdown as long as E b remains above 0 V . This threshold, however, depends on E corr and may not be high enough in some cases, because stents that had E b values of up to about 0.1 V have been found to exhibit pitting on explants …”

Section: Methodsmentioning

confidence: 99%

“…Mechanical polishing generally results in values of E b – E corr that are considerably higher than those obtained for heat‐treated samples. In one study, MP stents were reported to have an average value of over 0.8 V in PBS, whereas heat‐treated stents had average values of 0.2–0.3 V . The majority of studies involving MP nitinol in PBS and Hanks solution have in fact found that E b – E corr exceeds 0.8 V .…”

Section: Localized Corrosionmentioning

confidence: 99%

The use of electrochemical techniques to evaluate the corrosion performance of metallic biomedical materials and devices

Pound

2018

J Biomed Mater Res

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The corrosion performance of metallic biomedical materials and devices is commonly evaluated using electrochemical techniques. Although test standards involving such techniques have been released to address some forms of corrosion, a key issue is application of the results with regard to use of an implantable device in vivo. This review focuses on nitinol, 316L/LVM stainless steel, and Co-Cr alloys and is intended to provide some perspective on the significance of results from tests concerning general corrosion, localized corrosion, galvanic corrosion, and fretting corrosion of these alloys in simulated physiological solutions. It also examines the factors that could cause differences in the corrosion performance between in vitro and in vivo exposure, with the goal of providing some rationale for applying electrochemical characteristics obtained from the tests to predict the corrosion performance in vivo. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res B Part B: Appl Biomater, 2018.

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“…The modification of the oxide layer on Ni-Ti alloy surface is a major method to improve the corrosion resistance and biocompatibility for medical and dental uses, and several surface treatment methods have been reported, including chemical passivation [8][9][10], heat treatment [8,[11][12][13][14][15], electropolishing [8,12,16,17], electrolytic treatment including anodic oxidation [18][19][20], acid pickling [21], and coating [16]. Although many of these reports intended to improve the biocompatibility for medical stent application, some research focused on dental appliances [16,20].…”

Section: Introductionmentioning

confidence: 99%