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首页> 外文期刊>Applied Surface Science >Fixation of bioactive calcium alkali phosphate on Ti6A14V implant material with femtosecond laser pulses
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Fixation of bioactive calcium alkali phosphate on Ti6A14V implant material with femtosecond laser pulses

机译：飞秒激光脉冲将生物活性碱式磷酸钙固定在Ti6A14V植入材料上

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摘要

Bone implants made of metal, often titanium or the titanium alloy Ti6A14V, need to be surface treated to become bioactive. This enables the formation of a firm and durable connection of the prosthesis with the living bone. We present a new method to uniformly cover Ti6A14V with a thin layer of ceramics that imitates bone material. These calcium alkali phosphates, called GB14 and CalO, are applied to the metal by dip coating of metal plates into an aqueous slurry containing the fine ceramic powder. The dried samples are illuminated with the 790 nm radiation of a pulsed femtosecond laser. If the laser fluence is set to a value just below the ablation threshold of the ceramic (ca. 0.4J/cm~2) the 30 fs laser pulses penetrate the partly transparent ceramic layer of 20-40 μm thickness. The remaining laser fluence at the ceramic-metal interface is still high enough to generate a thin metal melt layer leading to the ceramic fixation on the metal. The laser processing step is only possible because Ti6A14V has a lower ablation threshold (between 0.1 and 0.15 J/cm~2) than the ceramic material. After laser treatment in a fluence range between 0.1 and 0.4J/cm~2, only the particles in contact with the metal withstand a post-laser treatment (ultrasonic cleaning). The non-irradiated rest of the layer is washed off. In this work, we present results of a successful ceramic fixation extending over larger areas. This is fundamental for future applications of arbitrarily shaped implants.
机译：由金属制成的骨植入物，通常是钛或钛合金Ti6A14V，需要进行表面处理以具有生物活性。这使得假体与活骨形成牢固而持久的连接。我们提出了一种新方法，用模仿骨骼材料的陶瓷薄层均匀地覆盖Ti6A14V。通过将金属板浸涂到包含细陶瓷粉末的水性浆料中，将这些称为GB14和CalO的碱金属磷酸钙施用于金属。用脉冲飞秒激光器的790 nm辐射照射干燥的样品。如果将激光通量设置为刚好低于陶瓷的烧蚀阈值（约0.4J / cm〜2），则30 fs激光脉冲会穿透厚度为20-40μm的部分透明陶瓷层。陶瓷-金属界面处的剩余激光通量仍然足够高，以产生薄的金属熔体层，从而导致陶瓷固定在金属上。仅因为Ti6A14V具有比陶瓷材料低的烧蚀阈值（0.1至0.15 J / cm〜2），才可以进行激光加工。在0.1至0.4J / cm〜2的注量范围内进行激光处理后，只有与金属接触的颗粒才能经受激光后处理（超声波清洗）。该层的未辐照的其余部分被洗掉。在这项工作中，我们介绍了成功的陶瓷固定扩展到更大区域的结果。这对于任意形状的植入物的未来应用至关重要。

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  • 来源
    《Applied Surface Science》 |2011年第12期|p.5208-5212|共5页
  • 作者

    Christian Symietz; Erhard Lehmann; Renate Gildenhaar; Robert Koter; Georg Berger; Joerg Krueger;

  • 作者单位

    BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, D-12205 Berlin, Germany;

    BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, D-12205 Berlin, Germany;

    BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, D-12205 Berlin, Germany;

    BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, D-12205 Berlin, Germany;

    BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, D-12205 Berlin, Germany;

    BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, D-12205 Berlin, Germany;

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  • 正文语种 eng
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  • 关键词

    bone implant; bioceramic coating; titanium; calcium phosphate; femtosecond laser;

    机译：骨植入物;生物陶瓷涂层;钛;磷酸钙;飞秒激光;

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