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首页> 外文会议>STP 1471; Symposium on Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications; 20051109-10; Washington,DC(US) >Creation of Oxidized Zirconium Orthopaedic Implants
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Creation of Oxidized Zirconium Orthopaedic Implants

机译：氧化锆骨科植入物的创建

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摘要

More demanding performance expectations for total joint arthroplasty are driving the development of alternative bearing materials. Oxidized zirconium was developed as an alternative to cobalt-chromium alloy for knee and hip femoral components in order to reduce wear of the polyethylene counterface and to address the needs of metal-sensitive patients. Oxidation in high temperature air transforms the metallic Zr-2.5Nb alloy surface into a stable, durable, low-friction oxide ceramic without creating the risk for brittle fracture associated with monolithic ceramic components. This presentation reviews aspects of this technology with a historical perspective, including standards for the zirconium alloy, non-medical applications for oxidized zirconium, and previous orthopaedic applications for zirconium. Manufacturing processes for oxidized zirconium components are described, beginning with refining of the zirconium from beach sand, to producing the alloy ingot and bar, to fabricating the component shape, and finally to oxidizing the surface and burnishing it to a smooth finish. Conditions are described for producing the oxide with excellent integrity, which is nominally 5 μm thick and predominantly monoclinic phase. The metal and oxide microstructures are characterized and related to the mechanical properties of the components and durability of the oxide. Laboratory hip and knee simulator tests are reviewed, which indicate that oxidized zirconium components reduce wear of the polyethylene counterface by 40-90% depending on test conditions. As evidenced by promising early clinical experience, oxidized zirconium components have characteristics that provide an alternative to conventional cobalt-chromium components with an interchangeable surgical technique, while providing the potential for superior performance.
机译：对全关节置换术的性能要求越来越高，这正在推动替代轴承材料的发展。氧化锆是钴铬合金的替代品，可用于膝部和髋部股骨组件，以减少聚乙烯对接面的磨损并满足对金属敏感的患者的需求。高温空气中的氧化将Zr-2.5Nb合金金属表面转变成稳定，耐用，低摩擦的氧化物陶瓷，而不会产生与整体陶瓷组件相关的脆性断裂的风险。本演讲从历史的角度回顾了该技术的各个方面，包括锆合金标准，氧化锆的非医疗应用以及锆的先前矫形应用。描述了用于氧化的锆组分的制造方法，该过程首先是从沙滩沙子中提炼锆，生产合金锭和棒材，制造出零件形状，最后是氧化表面并将其打磨成光滑的表面。描述了用于生产具有优异完整性的氧化物的条件，该氧化物的标称厚度为5μm，主要为单斜晶相。金属和氧化物的微观结构的特征在于其与部件的机械性能和氧化物的耐久性有关。审查了实验室的髋部和膝部模拟器测试，这些测试表明，氧化锆成分可根据测试条件将聚乙烯对面的磨损降低40-90％。正如有希望的早期临床经验所证明的那样，氧化锆组分具有可通过可互换的外科手术技术替代常规钴铬组分的特性，同时具有潜在的优越性能。

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