Gouveia Diogo do Nascimento Machado, Razzoog Michael E, Sierraalta Marianella, Alfaro Maria Fernanda
Assistant Professor, Department of Restorative and Prosthetic Dentistry, The Ohio State University, Columbus, Ohio.
Professor, Department of Biological and Material Sciences, Division of Prosthodontics, University of Michigan, Ann Arbor, Mich.
J Prosthet Dent. 2022 Nov;128(5):1061-1066. doi: 10.1016/j.prosdent.2021.02.003. Epub 2021 Mar 5.
Polyaryletherketones (PAEKs) are high-performance polymer materials in which polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) are the most used. Although mechanical and shear bonding strength tests have been performed on the 2 materials, studies on the influence of processing on bonding are scarce.
The purpose of this in vitro study was to determine the influence of the surface treatment and the manufacturing process on the shear bond strength of veneering composite resin to PEKK and PEEK.
Thirty pressed PEKK, 30 milled PEKK, and 30 milled PEEK specimens were distributed in 6 groups (n=13) as per the manufacturing process and treatment surface. The specimens were either treated with airborne-particle abrasion with 110-μm aluminum oxide, or no surface treatment was applied. Moreover, the PEKK specimens were grouped regarding their manufacturing process, as either milled or heat-pressed. The specimens were all bonded by using a methyl methacrylate-based adhesive (visio.link), and composite resin (Gradia Revolution 2) was bonded to the specimens. An Instron universal machine was used to calculate the shear bond strength between the PEEK or PEKK and the composite resin. Two specimens from each group had their topography modification assessed with a scanning electron microscope. Statistical analysis was performed by using a 3-way ANOVA for multiple comparisons (α=0.05) RESULTS: The groups that were surface treated with 110-μm aluminum oxide (AlO) before bonding showed significantly higher shear bond strength (P=.001) than the other groups. However, no statistically significant difference was observed among the groups, regardless of the manufacturing process (milled or heat-pressed) (P=.607).
PEEK and PEKK surfaces treated with 110-μm aluminum oxide airborne-particle abrasion displayed better shear bond strength to composite resin. The manufacturing process (milled or heat-pressed) did not significantly affect the bond strength of PEKK when subjected to the same bonding process.
聚芳醚酮（PAEKs）是高性能聚合物材料，其中聚醚醚酮（PEEK）和聚醚酮酮（PEKK）应用最为广泛。尽管已经对这两种材料进行了机械和剪切粘结强度测试，但关于加工对粘结影响的研究却很少。
本体外研究的目的是确定表面处理和制造工艺对饰面复合树脂与PEKK和PEEK之间剪切粘结强度的影响。
根据制造工艺和处理表面，将30个压制PEKK、30个铣削PEKK和30个铣削PEEK样本分为6组（n = 13）。样本要么用110μm氧化铝进行空气颗粒磨损处理，要么不进行表面处理。此外，PEKK样本根据其制造工艺分为铣削或热压组。所有样本均使用基于甲基丙烯酸甲酯的粘合剂（visio.link）进行粘结，并将复合树脂（Gradia Revolution 2）粘结到样本上。使用Instron万能机计算PEEK或PEKK与复合树脂之间的剪切粘结强度。每组选取两个样本，用扫描电子显微镜评估其表面形貌变化。使用三因素方差分析进行统计分析以进行多重比较（α = 0.05）。结果：粘结前用110μm氧化铝（AlO）进行表面处理的组显示出比其他组显著更高的剪切粘结强度（P = 0.001）。然而，无论制造工艺（铣削或热压）如何，各组之间均未观察到统计学上的显著差异（P = 0.607）。
用110μm氧化铝空气颗粒磨损处理的PEEK和PEKK表面对复合树脂显示出更好的剪切粘结强度。当采用相同的粘结工艺时，制造工艺（铣削或热压）对PEKK的粘结强度没有显著影响。
