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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Characterization of the quasi‐static and viscoelastic properties of orthopaedic bone cement at the macro and nanoscale
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Characterization of the quasi‐static and viscoelastic properties of orthopaedic bone cement at the macro and nanoscale

机译：宏观和纳米尺度骨水泥的准静态和粘弹性的表征

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Abstract Acrylic bone cement is often used in total joint replacement procedures to anchor an orthopaedic implant to bone. Bone cement is a viscoelastic material that exhibits creep and stress relaxation properties, which have been previously characterized using a variety of techniques such as flexural testing. Nanoindentation has become a popular method to characterize polymer mechanical properties at the nanoscale due to the technique's high sensitivity and the small sample volume required for testing. The purpose of the present work therefore was to determine the mechanical properties of bone cement using traditional macroscale techniques and compare the results to those obtained from nanoindentation. To this end, the quasi‐static and viscoelastic properties of two commercially available cements, Palacos and Simplex, were assessed using a combination of three‐point bending and nanoindentation. Quasi‐static properties obtained from nanoindentation tended to be higher relative to three‐point bending. The general displacement and creep compliance trends were similar for the two methods. These findings suggest that nanoindentation is an attractive characterization technique for bone cement, due to the small sample volumes required for testing. This may prove particularly useful in testing failed/retrieved cement samples from patients where material availability is typically limited. ? 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1461–1468, 2017.
机译：摘要丙烯酸骨水泥通常用于总联合替代程序，以将整形外科植入物锚固到骨骼上。骨水泥是一种粘弹性材料，其展示蠕变和应力松弛性能，其先前已经使用各种技术（例如弯曲测试）。由于技术的高灵敏度和测试所需的小样本量，纳米indentation已经成为纳米级的聚合物机械性能的流行方法。因此，本作工作的目的是使用传统的宏观技术确定骨水泥的机械​​性能，并将结果与​​从纳米凸缘获得的结果进行比较。为此，使用三点弯曲和纳米狭窄的组合评估两种市售水泥，帕拉卡猴和单纯克的准静态和粘弹性性质。从纳米内狭窄获得的准静态特性相对于三点弯曲倾向于更高。这两种方法都是相似的一般位移和蠕变合规性趋势。这些研究结果表明，由于测试所需的小样本量，纳米indentation是骨水泥的有吸引力的表征技术。这可能证明在从患者中测试失败/检索的水泥样本通常有用，其中材料可用性通常有限。还2016 Wiley期刊，Inc .J生物保解员B：Appl Biomater，105B：1461-1468,2017。

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