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首页> 外文期刊>Applied Surface Science >Bioactive coating on titanium implants modified by Nd:YVO_4 laser
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Bioactive coating on titanium implants modified by Nd:YVO_4 laser

机译：Nd：YVO_4激光修饰的钛植入物上的生物活性涂层

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摘要

Apatite coating was applied on titanium surfaces modified by Nd:YVC>4 laser ablations with different energy densities (fluency) at ambient pressure and atmosphere. The apatites were deposited by biomimetic method using a simulated body fluid solution that simulates the salt concentration of bodily fluids. The titanium surfaces submitted to the fast melting and solidification processes (ablation) were immersed in the simulated body fluid solution for four days. The samples were divided into two groups, one underwent heat treatment at 600℃ and the other dried at 37℃ For the samples treated thermally the diffractograms showed the formation of a phase mixture, with the presence of the hydroxyapatite, tricalcium phosphate, calcium deficient hydroxyapatite, carbonated hydroxyapatite and octacalcium phosphate phases. For the samples dried only the formation of the octacalcium phosphate and hydroxyapatite phases was verified. The infrared spectra show bands relative to chemical bonds confirmed by the diffraction analyses. The coating of both the samples with and without heat treatment present dense morphology and made up of a clustering of spherical particles ranging from 5 to 20 μm. Based on the results we infer that the modification of implant surfaces employing laser ablations leads to the formation of oxides that help the formation of hydroxyapatite without the need of a heat treatment.
机译：在Nd：YVC> 4激光烧蚀改性的钛表面上，在环境压力和大气压下，以不同的能量密度（流度）涂覆磷灰石涂层。通过仿生方法，使用模拟体液中的盐浓度的模拟体液溶液沉积磷灰石。将经过快速熔化和固化（烧蚀）的钛表面浸入模拟体液溶液中四天。样品分为两组，一组在600℃热处理，另一组在37℃干燥。对于经热处理的样品，衍射图显示形成相混合物，其中存在羟基磷灰石，磷酸三钙，缺钙的羟基磷灰石。 ，碳酸羟基磷灰石和磷酸八钙相。对于干燥的样品，仅验证了磷酸八钙和羟基磷灰石相的形成。红外光谱显示相对于化学键的谱带，这些谱带通过衍射分析得到了证实。经过和未经过热处理的样品涂层均具有致密的形貌，并由5到20μm的球形颗粒簇组成。根据结果​​，我们推断使用激光烧蚀对植入物表面进行改性会导致形成氧化物，从而无需热处理即可帮助羟基磷灰石的形成。

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  • 来源
    《Applied Surface Science》 |2011年第10期|p.4575-4580|共6页
  • 作者

    Edson de Almeida Filho; Alexandre F. Fraga; Rafael A. Bini; Antonio C. Guastaldi;

  • 作者单位

    Universidade Estadual Paulista - UNESP, Institute de Quimica, Grapo de Biomateriais, Caixa Postal 355, 14800-900, Araraquara, SP, Brazil;

    Universidade Federal de Sao Carlos - UFSCar- Departamento de Engenharia de Materiais-DEMa Rodovia Washington Luis, km 235 - SP-310 13565-905, Sdo Carlos, SP, Brazil;

    Universidade Estadual Paulista - UNESP, Institute de Quimica, Grapo de Biomateriais, Caixa Postal 355, 14800-900, Araraquara, SP, Brazil;

    Universidade Estadual Paulista - UNESP, Institute de Quimica, Grapo de Biomateriais, Caixa Postal 355, 14800-900, Araraquara, SP, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Laser ablation; Apatites; Titanium; Biomimetic method;

    机译：激光烧蚀;磷灰石;钛;仿生方法;

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