SiO2-CaO-P2O5 (58S) sol gel glass applied onto surgical grade stainless steel by spray technique: morphological characterization by digital image processing

Q1 Materials Science

Biomedical Glasses Pub Date : 2016-03-10 DOI:10.1515/bglass-2016-0002

S. Omar, J. Pastore, A. Bouchet, S. Pellice, V. Ballarin, S. Cere, J. Ballarre

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引用次数: 1

Abstract

Abstract AISI 316L stainless steel is commonly used as a low-cost material for permanent implants. It can be protected for degradation and corrosion by applying a hybrid silica based coating. Also the bioactive response of the implant can only be achieved by functionalizing the coated implant surface. The aim of this work is to synthesize and characterize a sol-gel made glass particles from the system SiO2-CaO-P2O5 with potential as bone inductive material, with and without an aging treatment of the precursor solution. The glass was synthesized by sol-gel technique that, comparing with melt glasses, generates an open net structure that could lead to particle dissolution and apatite deposition for biological purposes. The synthesized glass is dispersed by spray onto AISI 316L protected by a hybrid silica based coating, generating deposits with different size and morphology. To characterize the particles composition, microRaman spectroscopy was applied. It showed that no significant changes were reached after aging or thermal treatment of the deposited particles. Image processing techniques based on Mathematical Morphology were used to analyze morphology and sizes of the deposits obtain with the different sols (aged and no aged). Aproximately 50% of the surface was covered with particles made with a glass aged, and a 25% of covered area was reached with no aged one. When no aged glass particles were deposited, the particle size distribution shows the presence of many big particles with a roundness factor between 0.8 and 1 in a high percentage, meaning that they are spherical due to the presence of solvent and with a more open glass structure in the no aged glass. The Digital Image Processing and Raman spectroscopy tools help to analyze, characterize and quantify the bioactive particles deposited onto coated surgical grade stainless steel in terms of morphology, distribution and composition.

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用喷雾技术将SiO2-CaO-P2O5 (58S)溶胶凝胶玻璃应用于手术级不锈钢:数字图像处理形态学表征

AISI 316L不锈钢作为一种低成本的材料被广泛应用于永久种植体。它可以保护降解和腐蚀，通过应用混合硅基涂层。此外，植入物的生物活性反应只能通过使被涂覆的植入物表面功能化来实现。本研究的目的是在前驱体溶液进行老化处理和不进行老化处理的情况下，合成一种具有骨诱导材料潜力的由SiO2-CaO-P2O5体系制成的溶胶-凝胶玻璃颗粒并对其进行表征。该玻璃采用溶胶-凝胶技术合成，与熔融玻璃相比，它产生了一个开放的网状结构，可以导致颗粒溶解和磷灰石沉积，用于生物目的。将合成的玻璃通过喷雾分散到由混合二氧化硅基涂层保护的AISI 316L上，产生不同尺寸和形态的沉积物。采用微罗曼光谱技术对颗粒组成进行表征。结果表明，经时效或热处理后，沉积颗粒的形貌无明显变化。采用基于数学形态学的图像处理技术对不同溶胶(老化和未老化)下获得的沉积物进行形貌和尺寸分析。大约50%的表面被老化玻璃制成的颗粒覆盖，25%的覆盖面积没有老化玻璃。当无老化玻璃颗粒沉积时，颗粒尺寸分布显示存在许多大颗粒，圆度因子在0.8 ~ 1之间的比例很高，这意味着它们由于溶剂的存在而呈球形，并且在无老化玻璃中具有更开放的玻璃结构。数字图像处理和拉曼光谱工具有助于分析、表征和量化沉积在涂层手术级不锈钢上的生物活性颗粒的形态、分布和成分。

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来源期刊

Biomedical Glasses Materials Science-Surfaces, Coatings and Films

自引率

0.00%

发文量

审稿时长

17 weeks

期刊介绍： Biomedical Glasses is an international Open Access-only journal covering the field of glasses for biomedical applications. The scope of the journal covers the science and technology of glasses and glass-based materials intended for applications in medicine and dentistry. It includes: Chemistry, physics, structure, design and characterization of biomedical glasses Surface science and interactions of biomedical glasses with aqueous and biological media Modeling structure and reactivity of biomedical glasses and their interfaces Biocompatibility of biomedical glasses Processing of biomedical glasses to achieve specific forms and functionality Biomedical glass coatings and composites In vitro and in vivo evaluation of biomedical glasses Glasses and glass-ceramics in engineered regeneration of tissues and organs Glass-based devices for medical and dental applications Application of glasses and glass-ceramics in healthcare.