Wear improvement and local structure in nickel-titanium coatings produced by reactive ion sputtering

Girardeau, T.; Bouslykhane, K.; Mimault, J.; Villain, Jacques; Chartier, Patrick

doi:10.1016/0040-6090(95)08499-1

Cited by 20 publications

(9 citation statements)

References 16 publications

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“…Titanium nitride coatings have high hardness and good wear resistance 42, 43. However, the wear improvement highly depends on the amorphous matrix composition and the size of precipitates 42. Furthermore, Tian et al44 reported the suppression of Ni in the stainless steel surface after nitrogen PIII.…”

Section: Discussionmentioning

confidence: 99%

TSG‐6 inhibits osteoclast activity via an autocrine mechanism and is functionally synergistic with osteoprotegerin

Mahoney¹,

Swales²,

Athanasou³

et al. 2011

Arthritis & Rheumatism

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Objective. TSG-6 (the product of tumor necrosis factor [TNF]-stimulated gene 6) has a potent inhibitory effect on RANKL-mediated bone erosion. The aim of this study was to compare the activity of TSG-6 with that of osteoprotegerin (OPG) and to investigate its role as an autocrine modulator of cytokine-mediated osteoclast formation/activation. We also determined TSG-6 expression in inflammatory joint disease.Methods. The effects of TSG-6, OPG, and the inflammation mediators TNF␣, interleukin-1 (IL-1), and IL-6 on the formation of osteoclasts from peripheral blood mononuclear cells and synovial fluid (SF) macrophages were determined by tartrateresistant acid phosphatase staining. Lacunar resorption and filamentous actin ring formation were measured as indicators of osteoclast activity. The amount of TSG-6 in culture media or SF was quantified by enzyme-linked immunosorbent assay, and expression of TSG-6 in synovial tissue was assessed by immunohistochemistry.Results. TSG-6 acted in synergy with OPG to inhibit RANKL-mediated bone resorption and was produced by osteoclast precursors and mature osteoclasts in response to TNF␣, IL-1, and IL-6. Expression of TSG-6 correlated with inhibition of lacunar resorption; this effect was ameliorated by an anti-TSG-6 antibody. The level of TSG-6 protein was determined in SF from patients with various arthritides; it was highest in patients with inflammatory conditions such as rheumatoid arthritis, in which it correlated with the amount of TSG-6 immunostaining in the synovium. TSG-6 inhibited the activation but not the formation of osteoclasts from SF macrophages.Conclusion. In the presence of inflammatory cytokines, osteoclasts produced TSG-6 at concentrations that are sufficient to inhibit lacunar resorption. This may represent an autocrine mechanism to limit the degree of bone erosion during joint inflammation.

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Section: Discussionmentioning

confidence: 99%

TSG‐6 inhibits osteoclast activity via an autocrine mechanism and is functionally synergistic with osteoprotegerin

Mahoney¹,

Swales²,

Athanasou³

et al. 2011

Arthritis & Rheumatism

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“…Furthermore, the N‐PIII samples show more superior cell results than stainless steel and Ti alloy samples after 8 days of culturing ( p < 0.05). In addition to more superior surface mechanical properties,67, 68 the N‐PIII NiTi favors osteoblast proliferation. Based on reports in the literature, the TiN coating is well tolerated by different cells, particularly bone cells 55, 65, 69, 70.…”

Section: Discussionmentioning

confidence: 99%

Surface mechanical properties, corrosion resistance, and cytocompatibility of nitrogen plasma‐implanted nickel–titanium alloys: A comparative study with commonly used medical grade materials

Yeung

Poon

Chu

et al. 2007

J Biomedical Materials Res

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Stainless steel and titanium alloys are the most common metallic orthopedic materials. Recently, nickel-titanium (NiTi) shape memory alloys have attracted much attention due to their shape memory effect and super-elasticity. However, this alloy consists of equal amounts of nickel and titanium, and nickel is a well known sensitizer to cause allergy or other deleterious effects in living tissues. Nickel ion leaching is correspondingly worse if the surface corrosion resistance deteriorates. We have therefore modified the NiTi surface by nitrogen plasma immersion ion implantation (PIII). The surface chemistry and corrosion resistance of the implanted samples were studied and compared with those of the untreated NiTi alloys, stainless steel, and Ti-6Al-4V alloy serving as controls. Immersion tests were carried out to investigate the extent of nickel leaching under simulated human body conditions and cytocompatibility tests were conducted using enhanced green fluorescent protein mice osteoblasts. The X-ray photoelectron spectroscopy results reveal that a thin titanium nitride (TiN) layer with higher hardness is formed on the surface after nitrogen PIII. The corrosion resistance of the implanted sample is also superior to that of the untreated NiTi and stainless steel and comparable to that of titanium alloy. The release of nickel ions is significantly reduced compared with the untreated NiTi. The sample with surface TiN exhibits the highest amount of cell proliferation whereas stainless steel fares the worst. Compared with coatings, the plasma-implanted structure does not delaminate as easily and nitrogen PIII is a viable way to improve the properties of NiTi orthopedic implants.

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“…Nitrogen is the most common impurity in stainless steel, Ti6Al4V, and aluminum alloys to enhance their mechanical properties and corrosion resistance 59, 60. In our experiments, the NiTi alloy with a TiN layer had lower dissolution currents, higher corrosion resistance, and higher wear resistance than the untreated NiTi alloy.…”

Section: Discussionmentioning

confidence: 57%

“…The modified surfaces not only possess better corrosion resistance, but also are capable of resisting mechanical shocks. The efficacy of using PIII to strengthen the material's surface mechanical properties such as hardness and elastic modulus66 depends on the amorphous matrix composition and the size of precipitates 59. Additionally, the corrosion resistance seems to be directly proportional to the surface conditions of metals.…”

Section: Discussionmentioning

confidence: 99%

Corrosion resistance, surface mechanical properties, and cytocompatibility of plasma immersion ion implantation–treated nickel‐titanium shape memory alloys

Yeung

Poon

Liu

et al. 2005

J Biomedical Materials Res

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Nickel-titanium shape memory alloys are promising materials in orthopedic applications because of their unique properties. However, for prolonged use in a human body, deterioration of the corrosion resistance of the materials becomes a critical issue because of the increasing possibility of deleterious ions released from the substrate to living tissues. We have investigated the use of nitrogen, acetylene, and oxygen plasma immersion ion implantation (PIII) to improve the corrosion resistance and mechanical properties of the materials. Our results reveal that the corrosion resistance and mechanical properties such as hardness and elastic modulus are significantly enhanced after surface treatment. The release of nickel is drastically reduced as compared with the untreated control. In addition, our in vitro tests show that the plasma-treated surfaces are well tolerated by osteoblasts. Among the three types of samples, the best biological effects are observed on the nitrogen PIII samples.

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Wear improvement and local structure in nickel-titanium coatings produced by reactive ion sputtering

Cited by 20 publications

References 16 publications

TSG‐6 inhibits osteoclast activity via an autocrine mechanism and is functionally synergistic with osteoprotegerin

TSG‐6 inhibits osteoclast activity via an autocrine mechanism and is functionally synergistic with osteoprotegerin

Surface mechanical properties, corrosion resistance, and cytocompatibility of nitrogen plasma‐implanted nickel–titanium alloys: A comparative study with commonly used medical grade materials

Corrosion resistance, surface mechanical properties, and cytocompatibility of plasma immersion ion implantation–treated nickel‐titanium shape memory alloys

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