首页> 外文期刊>Proceedings of the institution of mechanical engineers >Synthesis, characterization, and coating of forsterite (Mg_2SiO_4) based material over medical implants: A review
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Synthesis, characterization, and coating of forsterite (Mg_2SiO_4) based material over medical implants: A review

机译:医用植入物上镁橄榄石(Mg_2SiO_4)基材料的合成,表征和涂层:综述

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摘要

Biocompatible metallic alloys (stainless steel, Ti-alloy, Co-Cr alloys, etc.) have been frequently used for various biomedical implants. Being biocompatible, complications like implant corrosion, body inflammation, organ pain, local infection, and cytotoxicity cannot be avoided. Hydroxyapatite, a common biomaterial, is used in the form of powders, coatings, and composites for biomedical applications. But poor adhesion, poor load-bearing capacity, high dissolution, poor wear resistance, natural fragility, etc. are the few hindrances in the use of hydroxyapatite coating over implants. Hence, there is a need to focus on the development of alternative biomaterials and their coatings for metallic (orthopedic, dental, metallic stents, pacemakers, etc.) implants. To avoid various complexities and to improve the biocompatibility of metal implants, the coating of forsterite and its composites are being used nowadays. Techniques like dip coating, plasma spraying, and electrophoretic deposition are employed for such coatings. In this paper, a review based on methods of preparation of forsterite has been done. For the preparation of forsterite powder, various studies have reported the sintering temperature range to be 800-1450? and the crystallite size from 10nm to 100 mu m. The forsterite and its composites coating over Ti-alloy and stainless steel have also been reported. This paper also compares the mechanical and biological properties of forsterite and hydroxyapatite. It has been observed that the mechanical properties (hardness, fracture toughness, Young's modulus, and compressive strength), and biological properties (biocompatibility and bioactivity) of forsterite are favorable for the biomedical implant coating.
机译:生物相容性金属合金(不锈钢,钛合金,钴铬合金等)已经常用于各种生物医学植入物。由于具有生物相容性,因此无法避免诸如植入物腐蚀,身体发炎,器官疼痛,局部感染和细胞毒性等并发症。羟基磷灰石是一种常见的生物材料,以粉末,涂料和复合材料的形式用于生物医学应用。但是,在植入物上使用羟基磷灰石涂层的障碍很少,但是附着力差,承载能力差,溶解度高,耐磨性差,天然脆性等。因此,需要专注于替代生物材料及其用于金属(矫形,牙科,金属支架,起搏器等)植入物的涂层的开发。为了避免各种复杂性并提高金属植入物的生物相容性,如今正在使用镁橄榄石及其复合材料的涂层。这种涂层采用浸涂,等离子喷涂和电泳沉积等技术。本文对镁橄榄石的制备方法进行了综述。对于镁橄榄石粉末的制备,各种研究报道了烧结温度范围为800-1450℃。晶粒尺寸从10nm到100μm。也已经报道了钛合金和不锈钢上的镁橄榄石及其复合涂层。本文还比较了镁橄榄石和羟基磷灰石的力学和生物学性能。已经观察到镁橄榄石的机械性能(硬度,断裂韧性,杨氏模量和抗压强度)和生物学性能(生物相容性和生物活性)对于生物医学植入物涂层是有利的。

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