Calcium phosphate coating of nickel–titanium shape-memory alloys. Coating procedure and adherence of leukocytes and platelets

Choi, Jeong‐Yun; Bogdanski, D.; Köller, Manfred; Esenwein, S. A.; Müller, Dietmar; Muhr, G.; Epple, Matthias

doi:10.1016/s0142-9612(03)00241-2

Cited by 101 publications

(70 citation statements)

References 47 publications

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“…Therefore, it can be speculated that the porous sodium titanate/ titania film with a graded interface structure to NiTi substrate will improve the bonding strength of the apatite layer with NiTi substrate, which can also be indicated by the work of Choi and colleagues. 34 In their study, 34 an ideal calcium phosphate coating was fabricated by the dip-coating method on NiTi SMA after a composite pretreatment by oxidizing in H 2 O 2 solution and subsequent KOH treatment, and shows a sufficient mechanical stability to withstand both the shape-memory transition upon cooling and heating and also strong bending of the material (superelastic effect). The effect of this bioactive sodium titanate/ titania graded film on the interface structure and the bonding strength between the apatite layer by subsequent deposition in SBF and NiTi substrate as well as further work are being pursued in our laboratory and will be reported in due course.…”

Section: Discussionmentioning

confidence: 99%

“…Choi and colleagues 34 and Bogdanski and colleagues 35 recently used the dip-coating method introduced by Kokubo, van Blitterswijk, de Groot, and others 3,36 -38 to fabricate an ideal calcium phosphate coating on NiTi SMA after a composite pretreatment by oxidizing in H 2 O 2 solution and subsequent KOH treatment. It should be noted that their studies mainly focused on the microstructural characteristics responsible for shape memory effect and the biocompatibility of this calcium phosphate coating on NiTi SMA, and few studies on the influences of the composite pretreatment by oxidizing in H 2 O 2 solution and subsequent alkaline treatment on the surface microstructure of NiTi SMA.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and characteristics of bioactive sodium titanate/titania graded film on NiTi shape memory alloy

Chu

Chung

Zhou

et al. 2005

J Biomedical Materials Res

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A bioactive sodium titanate/titania graded film was formed in situ on NiTi shape memory alloy (SMA) by oxidizing in H(2)O(2) solution and subsequent NaOH treatment and characterized by scanning electron microscopy, Raman spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy (XPS). The bioactivity of the film was investigated using a simulated body fluid (SBF) soaking test. A titania (TiO(2)) layer was first found on NiTi substrate after oxidized in H(2)O(2) solution, and then a porous sodium titanate (Na(2)TiO(3))/titania film with many Ti--OH groups and a trace of Ni(2)O(3) was formed by the reaction of partial TiO(2) phase with NaOH solution. After immersion in SBF for 12 h, apatite was observed to nucleate and grow on the film. With longer soaking time, more apatite appeared on its surface but our control experiments didn't reveal any apatite formation on the chemically polished NiTi SMA, which indicates the bioactivity of NiTi implants could be improved by the formation of the bioactive film. Moreover, XPS depth profiles of O, Ni, Ti, and Na show the bioactive film possesses a smooth graded interface structure to NiTi substrate, which is in favor of sufficient mechanical stability of apatite layer by subsequent deposition in SBF.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication and characteristics of bioactive sodium titanate/titania graded film on NiTi shape memory alloy

Chu

Chung

Zhou

et al. 2005

J Biomedical Materials Res

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“…16 As we have shown previously, PBMC fractions also contained substantial amounts of platelets, which may rapidly bind to biomaterial surfaces such as calcium phosphate layers. 17 Therefore, the content of TGF-␤1 in cell supernatants was additionally analyzed. As is shown in Table II, there was no significant increase in TGF-␤1 concentration after 1 h settlement of PBMC on the curing CBC in comparison to the cell culture medium alone although a release of TGF-␤1 from cells was experimentally induced by concomitant cell stimulation with a Caionophore.…”

Section: Regulatory Mechanisms Of Il-2 Releasementioning

confidence: 99%

Cytokine release of mononuclear leukocytes (PBMC) after contact to a carbonated calcium phosphate bone cement

Schildhauer

Muhr

Köller

2006

J Biomedical Materials Res

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Human leukocytes (peripheral blood mononuclear cells, PBMC) were overlaid on calcium phosphate bone cement (CBC, Norian SRS) and allowed to settle for 1 h under cell culture conditions. Subsequently, the cells were either left unstimulated (i.e. sham stimulation using cell culture medium), or stimulated with toxic shock syndrome toxin-1 (TSST-1, 10 ng/mL), staphylococcal enterotoxin B (SEB, 10 ng/mL), or concanavalin A (ConA, 2 microg/mL) for further 24 h using cell culture conditions. Supernatants were then analyzed for cytokine content (interleukin-1 receptor antagonist, IL-1ra; IL-2; IL-6; IL-10; IL-12) by enzyme-linked immunosorbent assay. While the spontaneous generation of cytokines was not influenced, the IL-2 release from stimulated PBMC was significantly decreased in contrast to other analyzed cytokines after contact to the curing CBC compared to control incubations without CBC. This decrease in IL-2 release was not due to known inhibitors of IL-2 synthesis platelet factor-4 (PF-4), IL-10, TGF-beta, or elevated calcium ion concentrations.

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“…HAp has been formed on metals and polymers using various techniques [15,16], such as dip coating [17,18], electrophoretic deposition [19,20], the alternate soaking process [21][22][23][24], thermal spraying [25,26], dynamic mixing [27], RF magnetron sputtering [28,29], pulsed laser ablation [30] and low-voltage deposition [31]. The coating temperature of HNS during HAp formation is important, because the release of N 2 from HNS by high-temperature treatment causes the phase change from austenite to ferrite [32,33].…”

Section: Introductionmentioning

confidence: 99%

Preparation and biological evaluation of hydroxyapatite-coated nickel-free high-nitrogen stainless steel

Sasaki

Inoue

Katada

et al. 2012

Science and Technology of Advanced Materials

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Calcium phosphate was formed on nickel-free high-nitrogen stainless steel (HNS) by chemical solution deposition. The calcium phosphate deposition was enhanced by glutamic acid covalently immobilized on the surface of HNS with trisuccinimidyl citrate as a linker. X-ray diffraction patterns and Fourier transform infrared spectra showed that the material deposited on glutamic acid-immobilized HNS within 24 h was low-crystallinity calcium-deficient carbonate-containing hydroxyapatite (HAp). The biological activity of the resulting HAp-coated HNS was investigated by using a human osteoblast-like MG-63 cell culture. The HAp-coated HNS stimulated the alkaline-phosphate activity of the MG-63 culture after 7 days. Therefore, HAp-coated HNS is suitable for orthopedic devices and soft tissue adhesion materials.

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Calcium phosphate coating of nickel–titanium shape-memory alloys. Coating procedure and adherence of leukocytes and platelets

Cited by 101 publications

References 47 publications

Fabrication and characteristics of bioactive sodium titanate/titania graded film on NiTi shape memory alloy

Fabrication and characteristics of bioactive sodium titanate/titania graded film on NiTi shape memory alloy

Cytokine release of mononuclear leukocytes (PBMC) after contact to a carbonated calcium phosphate bone cement

Preparation and biological evaluation of hydroxyapatite-coated nickel-free high-nitrogen stainless steel

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