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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Comparison of failure characteristics of a range of cancellous bone-bone cement composites
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Comparison of failure characteristics of a range of cancellous bone-bone cement composites

机译：一系列松质骨水泥复合材料的破坏特性比较

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摘要

Over the past decade, orthopedic surgery has embraced an increase in the depth of cement penetration into the adjacent cancellous bone structure. The resultant interdigitation transforms this zone into a thick layer of continuous interpenetrating composite material. The failure behavior of the composite formed with a number of potential bone cements with different bonding ability was investigated. The cancellous bone-cement composites exhibit considerable resistance to crack extension, and in situ optical observation indicates that the contribution of the cancellous bone is analogous to that of a typical fiber bridging process. The critical stress intensity factor and the work of fracture have been used to quantify the failure characteristics of the cancellous bone-cement composites. The nature of the crack propagation through these cement-bone composites was also captured via optical microscopy, and scanning electron microscopic images were taken of the failure surfaces. The R-curve behavior, or crack extension characteristic, of the cancellous bone-cement composite was also determined. The interesting outcome is that the cancellous bone-PMMA (poly-methylmethacrylate) composite, despite the absence of chemical bonding with bone, required the highest energy to fracture. In addition, the dimensional stability of the cement has a great effect on the interface.
机译：在过去的十年中，整形外科已经接受了水泥渗入邻近的松质骨结构的深度的增加。最终的交叉指状将这个区域转变成厚薄的连续互穿复合材料层。研究了由许多具有不同粘结能力的潜在骨水泥形成的复合材料的破坏行为。松质骨水泥复合材料对裂纹扩展具有相当大的抵抗力，并且原位光学观察表明，松质骨的贡献类似于典型的纤维桥接过程。临界应力强度因子和断裂功已用于量化松质骨水泥复合材料的破坏特性。还通过光学显微镜捕获了通过这些水泥骨复合材料传播的裂纹的性质，并拍摄了破坏表面的扫描电子显微镜图像。还确定了松质骨水泥复合材料的R曲线行为或裂纹扩展特性。有趣的结果是，尽管与骨骼之间没有化学键合，但松质骨-PMMA（聚甲基丙烯酸甲酯）复合材料仍需要最高的破裂能量。另外，水泥的尺寸稳定性对界面有很大的影响。

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