Faculty of Dentistry, Department of Prosthodontics, Kırıkkale University, Kırıkkale, Turkey.
Department of Prosthodontics, Afyon Kocatepe University School of Dentistry, Afyonkarahisar, Turkey.
J Prosthodont. 2020 Feb;29(2):136-141. doi: 10.1111/jopr.12702. Epub 2017 Nov 13.
To investigate the effect of different surface treatments on the surface roughness (Ra), wettability, and shear bond strength of polyetheretherketone (PEEK) to composite resin.
One hundred ninety eight PEEK specimens were divided into six groups (n = 33). Specimen surfaces were treated with the following surface treatment modalities: silicoating (CoJet), acetone treatment, acid etching (H SO ), airborne particle abrasion (Al O ), laser irradiation (Yb:PL laser), and the nontreated surface serving as the control. Surface roughness was measured with an profilometer (n = 11) and a goniometer was used to measure the surface wettability through contact angle (θ)(n = 11). PEEK surfaces were veneered with a composite resin (n = 11). The specimens were then thermocycled for 10,000 cycles at 5 to 55°C. Shear bond strengths between the PEEK and composite resin were measured with an universal test machine. One-way ANOVA was used to analyze the data. Tukey's post-hoc test was used to determine significant differences between groups (α = 0.05).
Surface roughness and wettability of PEEK surfaces along with shear bond strength of PEEK to composite resin were influenced by the surface treatments. (p < 0.01) Highest mean Ra values were obtained for PEEK surfaces treated by laser irradiation (2.85 ± 0.2 µm) followed by airborne particle abrasion (2.26 ± 0.33 µm), whereas other surface treatment modalities provided similar Ra values, with the acid-etched PEEK surfaces having the lowest mean Ra values (0.35 ± 0.14 µm). Silicoating provided the most wettable PEEK surfaces (48.04 ± 6.28º), followed by either acetone treatment (70.19 ± 4.49º) or acid treatment (76.07 ± 6.61º). Decreased wettability was observed for airborne particle abraded (84.83 ± 4.56º) and laser-treated PEEK surfaces (103.06 ± 4.88º). The highest mean shear bond strength values were observed for acid-etched PEEK surfaces (15.82 ± 4.23 MPa) followed by laser irradiated (11.46 ± 1.97 MPa), airborne particle abraded (10.81 ± 3.06 MPa), and silicoated PEEK surfaces (8.07 ± 2.54 MPa). Acetone-treated (5.98 ± 1.54 MPa) and untreated PEEK surfaces (5.09 ± 2.14 MPa) provided the lowest mean shear bond strengths.
The highest mean shear bond strengths were observed for acid-etched PEEK surfaces, followed by laser-irradiated, airborne particle abraded, and silicoated PEEK surfaces providing similar mean shear bond strengths. Since shear bond strengths higher than 10 MPa are considered acceptable, acid etching, laser irradiation, and airborne particle abrasion of PEEK surfaces may be considered viable surface treatment modalities for the PEEK material tested.
研究不同表面处理方式对聚醚醚酮（PEEK）与复合树脂之间的表面粗糙度（Ra）、润湿性和剪切结合强度的影响。
将 198 个 PEEK 标本分为 6 组（n = 33）。采用以下表面处理方式对标本表面进行处理：硅烷涂层（CoJet）、丙酮处理、酸蚀（H 2 SO 4 ）、空气颗粒喷砂（Al 2 O 3 ）、激光照射（Yb：PL 激光），未处理的表面作为对照。采用轮廓仪测量表面粗糙度（n = 11），使用接触角测定仪测量表面润湿性（θ）（n = 11）。将 PEEK 表面包复上复合树脂（n = 11）。然后将标本在 5 至 55°C 之间进行 10,000 次热循环。采用万能试验机测量 PEEK 与复合树脂之间的剪切结合强度。采用单因素方差分析对数据进行分析。采用 Tukey 事后检验确定组间的显著差异（α = 0.05）。
PEEK 表面的粗糙度和润湿性以及 PEEK 与复合树脂的剪切结合强度均受表面处理的影响。（p < 0.01）激光照射处理的 PEEK 表面获得的 Ra 值最高（2.85 ± 0.2 µm），其次是空气颗粒喷砂处理（2.26 ± 0.33 µm），而其他表面处理方式提供的 Ra 值相似，酸蚀处理的 PEEK 表面具有最低的平均 Ra 值（0.35 ± 0.14 µm）。硅烷涂层提供了最具润湿性的 PEEK 表面（48.04 ± 6.28°），其次是丙酮处理（70.19 ± 4.49°）或酸处理（76.07 ± 6.61°）。空气颗粒喷砂和激光处理的 PEEK 表面的润湿性降低（84.83 ± 4.56°和 103.06 ± 4.88°）。酸蚀处理的 PEEK 表面获得的平均剪切结合强度最高（15.82 ± 4.23 MPa），其次是激光照射处理（11.46 ± 1.97 MPa）、空气颗粒喷砂处理（10.81 ± 3.06 MPa）和硅烷涂层处理（8.07 ± 2.54 MPa）。丙酮处理（5.98 ± 1.54 MPa）和未处理的 PEEK 表面（5.09 ± 2.14 MPa）提供的平均剪切结合强度最低。
酸蚀处理的 PEEK 表面获得的平均剪切结合强度最高，其次是激光照射处理、空气颗粒喷砂处理和硅烷涂层处理的 PEEK 表面，它们提供的平均剪切结合强度相似。由于大于 10 MPa 的剪切结合强度被认为是可接受的，因此酸蚀、激光照射和空气颗粒喷砂处理可能是 PEEK 材料的可行表面处理方式。
