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Calcium carbonate hybrid coating promotes the formation of biomimetic hydroxyapatite on titanium surfaces

机译：碳酸钙杂化涂层促进钛表面上仿生羟基磷灰石的形成

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摘要

CaCO3 particles dispersed in liquid media have proven to be good inductors of hydroxyapatite (HAp) growth. However, the use of CaCO3 deposited as thin films for this propose is unknown. Here, we report the growth of CaCO3 continuous films on Langmuir-Blodgett (LB) modified titanium surfaces and its use as HAp growth inductor. The Ti surfaces were modified with two, four, and six layers of dihexadecylphosphate (DHP)-LB films containing Ca2+, exposed to CO2 (g) for 12 h. The modified surfaces were immersed in simulated body fluid (SBF) at 37 degrees C for 36 h and submitted to bioactivity studies. This procedure originates bioactive coatings composed by non-stoichiometric HAp as evidenced by Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS). The presence of the CaCO3 film as pre-coating diminished the time necessary to growth continuous and homogeneous HAp films using a biomimetic approach. The surface properties of the films regarding their roughness, composition, charge, wettability, and surface free energy (gamma(s)) were accessed. The presence of HAp increased the wettability and gamma(s) of the surfaces. The coatings are not toxic for osteoblasts as observed for cell viability assays obtained after 7 and 14 days of culture. Moreover, the CaCO3 thin films promote the recovery of the osteoblasts viability more than the Ti surfaces themselves. (C) 2016 Elsevier B.V. All rights reserved.
机译：事实证明，分散在液体介质中的CaCO3颗粒是羟基磷灰石（HAp）生长的良好诱导剂。然而，对于该提议，使用沉积为薄膜的CaCO 3尚不清楚。在这里，我们报告了在Langmuir-Blodgett（LB）修饰的钛表面上连续生长CaCO3薄膜及其作为HAp生长诱导剂的用途。用两层，四层和六层含Ca2 +的磷酸二十六烷基酯（DHP）-LB膜对Ti表面进行改性，然后将其暴露于CO2（g）中12 h。将改性后的表面在37摄氏度的模拟体液（SBF）中浸泡36小时，然后进行生物活性研究。该过程产生了由非化学计量的HAp组成的生物活性涂层，傅里叶变换红外光谱（FTIR），X射线衍射（XRD）和X射线光电子能谱（XPS）证明了这一点。 CaCO3膜作为预涂层的存在减少了使用仿生方法生长连续且均匀的HAp膜所需的时间。获得关于膜的粗糙度，组成，电荷，润湿性和表面自由能（γ）的表面性质。 HAp的存在增加了表面的润湿性和伽马值。如在培养7和14天后获得的细胞活力测定所观察到的那样，涂层对成骨细胞无毒。而且，CaCO3薄膜比Ti表面本身更能促进成骨细胞的活力恢复。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2016年第may1期|459-468|共10页
  • 作者

    Cruz Marcos Antonio E.; Ruiz Gilia C. M.; Faria Amanda N.; Zancanela Daniela C.; Pereira Lourivaldo S.; Ciancaglini Pietro; Ramos Ana P.;

  • 作者单位

    Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil;

    Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil;

    Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil|Univ Sao Paulo, Fac Med Ribeirao Preto, Dept Bioquim & Imunol, Ribeirao Preto, SP, Brazil;

    Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil;

    Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil;

    Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil;

    Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil;

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  • 正文语种 eng
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  • 关键词

    Calcium carbonate; hydroxyapatite; Langmuir-Blodgett films; Titanium; Bioactive surfaces;

    机译：碳酸钙;羟基磷灰石;Langmuir-Blodgett膜;钛;生物活性表面;

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