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Electrochemical behavior of 45S5 bioactive ceramic coating on Ti6Al4V alloy for dental applications

机译:45S5生物活性陶瓷涂层对牙科应用Ti6Al4V合金的电化学行为

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Titanium and its alloys are widely used as implant materials because of their mechanical properties and non-toxic behavior. Unfortunately, they are not bioinert, which means that they can release ions and can only fix the bone by mechanical anchorage, this can lead to the encapsulation of dense fibrous tissue in the body. The bone fixation is required in clinical conditions treated by orthopedic and dental medicine. The proposal is to coat metallic implants with bioactive materials to establish good interfacial bonds between the metal substrate and bone by increasing bioactivity. Bioactive glasses, ceramics specifically 45S5 Bioglass, have drawn attention as a serious functional biomaterial because osseointegration capacity. The EPD method of bioglass gel precursor was proposed in the present work as a new method to obtain 45S5/Ti6Al4V for dental applications. The coatings, were thermally treated at 700 and 800°C and presented the 45S5 bioglass characteristic phases showing morphology and uniformity with no defects, quantification percentages by EDS of Si, Ca, Na, P and O elements in the coating scratched powders, showed a good proportional relationship demonstrating the obtention of the45S5 bioglass. The corrosion tests were carried out in Hank's solution. By Tafel extrapolation, Ti6Al4V alloy showed good corrosion resistance in Hank's solution media, by the formation of a passivation layer on the metal surface, however, in the system 45S5/Ti6Al4V there was an increase in the corrosion resistance; i_(con)-, E_(corr) and corrosion rate decreased, the mass loss and the rate of release of ions, were lower in this system than in the titanium alloy without coating.
机译:由于其机械性能和无毒行为,钛及其合金被广泛用作植入材料。不幸的是,它们不是生物素线,这意味着它们可以释放离子并且只能通过机械锚定固定骨骼,这会导致身体中致密纤维组织的封装。在整形外科和牙科医学治疗的临床病症中需要骨固定。该提案是通过增加生物活性涂覆具有生物活性材料的金属植入物,以在金属基材和骨之间建立良好的界面键。生物活性玻璃,陶瓷专门为45s5生物生物,引起了严重的功能性生物材料,因为骨整合能力。在本作过程中提出了生物胶凝胶前体的EPD方法作为获得45s5 / Ti6Al4V的新方法,用于牙科应用。涂层在700和800℃下热处理,并呈现45S5个生物胶种特性相,显示形态和均匀性,没有缺陷,涂层涂层粉末中的Si,Ca,Na,P和O元素的量化百分比,显示出a良好的比例关系,证明了45S5生物制品的获得。腐蚀试验是在汉克的解决方案中进行的。通过Tafel外推,通过在金属表面上形成钝化层,Ti6Al4V合金在Hank的溶液介质中显示出良好的耐腐蚀性,然而,在系统45S5 / Ti6Al4V中,耐腐蚀性增加; I_(CON) - ,E_(COR)和腐蚀速率降低,在该系统中的质量损失和离子释放速率低于钛合金而没有涂层。

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