Abstract The purpose of this study is to investigate the effect of nitrogen plasma treatment on the shear bonding strength (SBS) of polyetheretherketone (PEEK) to resin cements. A total of 240 PEEK specimens were subjected to different duration of nitrogen plasma treatment for 0 min, 15 min, 25 min, 35 min respectively. The surface topography was observed by a scanning electron microscope (SEM). In addition, X-ray photoelectron spectroscopy (XPS) was applied to study the surface element content changes before and after treatment. The adhesive specimens were bonded with Variolink in all groups. Afterwards, each group was divided into three subgroups (n = 20/group), (a) water storage for 56 h at 37 °C, (b) thermal cycling for 5000 times, (c) thermal cycling for 10000 times. Following storage shear bond strength (SBS) was tested in a universal testing machine and the failure modes were observed by stereoscopic microscope. After plasma treatment, the bonding strength between PEEK and Variolink was significantly increased. Among them, the 25 min group achieved the highest bonding strength. After thermal cycling, the SBS values were significantly decreased, compared with the group in water storage. Nitrogen low temperature plasma treatment improves SBS between PEEK and resin, and a duration of 25 min treatment group seems to be the best.

中文翻译：

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氮等离子体处理对PEEK粘接性能的影响

摘要 本研究的目的是研究氮等离子体处理对聚醚醚酮 (PEEK) 与树脂水泥的剪切粘合强度 (SBS) 的影响。对总共 240 个 PEEK 样品分别进行了 0 分钟、15 分钟、25 分钟、35 分钟的不同持续时间的氮等离子体处理。通过扫描电子显微镜（SEM）观察表面形貌。此外，还应用X射线光电子能谱（XPS）来研究处理前后表面元素含量的变化。在所有组中，粘合剂样品都用 Variolink 粘合。之后，每组被分为三个亚组（n = 20/组），（a）在37°C下储水56小时，（b）热循环5000次，（c）热循环10000次。随后在万能试验机中测试储存剪切粘合强度（SBS），并通过立体显微镜观察破坏模式。等离子处理后，PEEK与Variolink的结合强度显着提高。其中，25 min组达到了最高的结合强度。与蓄水组相比，热循环后SBS值显着降低。氮气低温等离子体处理改善了 PEEK 与树脂之间的 SBS，持续时间为 25 分钟的处理组似乎是最好的。与蓄水组相比，SBS 值显着降低。氮气低温等离子体处理改善了 PEEK 与树脂之间的 SBS，持续时间为 25 分钟的处理组似乎是最好的。与蓄水组相比，SBS 值显着降低。氮气低温等离子体处理改善了 PEEK 与树脂之间的 SBS，持续时间为 25 分钟的处理组似乎是最好的。