Schwitalla Andreas Dominik, Bötel Friederike, Zimmermann Tycho, Sütel Mona, Müller Wolf-Dieter
Charité -Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, School of Dentistry, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
Charité -Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, School of Dentistry, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
Dent Mater. 2017 Sep;33(9):990-994. doi: 10.1016/j.dental.2017.06.003. Epub 2017 Jun 24.
The aim of the study was to evaluate the impact of low-pressure argon/oxygen plasma with and without previous sandblasting on the shear bond strength (SBS) between dental PEEK compounds and a veneering composite.
Of one type of unfilled PEEK and two pigment powder filled PEEK compounds, forty rectangular plates each were prepared and polished up to 4000 grit. The samples were randomly assigned to four surface pre-treatment groups, each consisting of ten specimens (1. Untreated; 2. Plasma treatment; 3. Sandblasting; 4. Sandblasting+plasma treatment). Plasma treatment was performed for 35min using a low-pressure plasma system with a 1:1 mixture of the process gases argon and oxygen. Surface roughness and water contact angles were recorded. An adhesive (Visio.link, Bredent GmbH & Co KG, Senden, Germany) was applied onto the specimen surfaces and light cured. A mold was used to shape the veneering composite (Vita VM LC, Vita Zahnfabrik, Bad Säckingen, Germany) into a cylindrical form on the sample surface before light curing. SBS was measured after 24h incubation at 37°C in distilled water using a universal testing machine.
The samples pre-treated according to group 4 (sandblasting and plasma treatment) showed the highest SBS overall, whereas the unfilled PEEK showed the highest SBS (19.8±2.46MPa) compared to the other PEEK materials (15.86±4.39MPa and 9.06±3.1MPa).
Sandblasting and surface activation with low-pressure argon/oxygen plasma in combination with an adhesive causes a favorable increase in shear bond strength, especially on unfilled PEEK material.
本研究旨在评估有无预先喷砂处理的低压氩/氧等离子体对牙科聚醚醚酮（PEEK）复合材料与饰面复合材料之间剪切粘结强度（SBS）的影响。
制备了一种未填充的PEEK和两种颜料粉末填充的PEEK复合材料，每种材料各制作40个矩形板，并打磨至4000目。将样品随机分为四个表面预处理组，每组10个样本（1. 未处理；2. 等离子体处理；3. 喷砂处理；4. 喷砂+等离子体处理）。使用低压等离子体系统，以氩气和氧气1:1的混合工艺气体进行35分钟的等离子体处理。记录表面粗糙度和水接触角。在试样表面涂抹粘合剂（Visio.link，Bredent GmbH & Co KG，德国森登）并光固化。在光固化前，使用模具将饰面复合材料（Vita VM LC，德国维他齿科集团，德国巴特萨克京根）在样品表面成型为圆柱形。在37°C蒸馏水中孵育24小时后，使用万能试验机测量SBS。
按照第4组（喷砂和等离子体处理）预处理的样品总体上显示出最高的SBS，而未填充的PEEK与其他PEEK材料（15.86±4.39MPa和9.06±3.1MPa）相比，显示出最高的SBS（19.8±2.46MPa）。
喷砂处理以及低压氩/氧等离子体表面活化与粘合剂相结合可使剪切粘结强度得到有利提高，尤其是在未填充的PEEK材料上。
