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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Evaluation of an accelerated aging medium for acrylic bone cement based on analysis of nanoindentation measurements on laboratory-prepared and retrieved specimens.
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Evaluation of an accelerated aging medium for acrylic bone cement based on analysis of nanoindentation measurements on laboratory-prepared and retrieved specimens.

机译:根据对实验室准备和回收的标本进行的纳米压痕测量分析,评估丙烯酸骨水泥的加速老化介质。

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摘要

The thrust of the study was a critical evaluation of the efficacy of a medium (30% v/v H(2)O(2), at 60 degrees C) that has been suggested in a literature report as being suitable for simulating the oxidative aging process, seen in vivo, in the acrylic bone cement mantles of total hip and knee joint replacements. For this purpose, quasi-static and dynamic nanoindentation measurements were used to obtain material properties--elastic modulus, E; hardness, H; and the variation of the storage and loss moduli with the frequency of the applied indenting force--of PalacosR acrylic bone cement specimens after various periods of immersion (7, 14, 21, and 28 days) in the aging solution, and of specimens prepared from cement mantles retrieved from cemented total hip joint replacements after various times in vivo (0.92-21 years). Also, best-fit relationships were obtained between E and time in the H(2)O(2) solution (t), H and t, E and in vivo time (T), and H and T. This body of results points to the possibility that the aging solution is effective, although the evidence is not conclusive.
机译:这项研究的重点是对一种介质(在60摄氏度下30%v / v H(2)O(2),在60摄氏度下)的功效进行了严格的评估,该文献已提出该介质适合于模拟氧化性从体内可见,在整个髋关节和膝关节置换的丙烯酸骨水泥套中老化过程。为此,使用准静态和动态纳米压痕测量来获得材料特性-弹性模量E;硬度,H;在老化溶液中浸泡不同时间(7、14、21和28天)后制得的PalacosR丙烯酸骨水泥标本的储能和损耗模量随施加压入力频率的变化在体内不同时间(0.92-21年)后,从固定的全髋关节置换物中获得的水泥套中提取。同样,获得了E和H(2)O(2)解决方案中的时间(t),H和t,E和体内时间(T)以及H和T之间的最佳拟合关系。尽管证据尚无定论,但老化解决方案可能有效。

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