Liebermann Anja, Wimmer Timea, Schmidlin Patrick R, Scherer Harry, Löffler Patrick, Roos Malgorzata, Stawarczyk Bogna
Assistant Professor, Department of Prosthodontics, Ludwig-Maximilians-University, Munich, Germany.
Head, Outpatient Department, Department of Prosthodontics, Ludwig-Maximilians-University, Munich, Germany.
J Prosthet Dent. 2016 Mar;115(3):321-8.e2. doi: 10.1016/j.prosdent.2015.09.004. Epub 2015 Nov 6.
Polyetheretherketone (PEEK) can be used to support fixed dental prostheses. However, information about physicomechanical characterization is still scarce.
The purpose of this in vitro study was to assess effects of different aging regimens/durations on roughness, solubility, water absorption, Martens hardness (HM), and indentation modulus/EIT on different computer-aided design and computer-aided manufacturing (CAD/CAM) polymers.
Forty standardized specimens of the following materials were fabricated: PEEK: Dentokeep (DK); hybrid material: VITA Enamic (EN); composite resins: LAVA Ultimate (LU) and an experimental CAD/CAM nanohybrid-composite resin (EX); poly(methyl methacrylate) (PMMA)-based: VITA CAD-Temp (CT); Telio CAD (TC), artBloc Temp (AT), and ZENOTEC ProFix (ZP). A nanofilled-polymer for interim restorations, Protemp 4 (CG), served as the control group. Specimens were stored in sodium chloride, artificial saliva, physiological saliva, and distilled water at 37°C for 1, 7, 14, 28, 90, and 180 days. Roughness, water absorption, HM, and EIT were investigated after each storage period; solubility was determined after 180 days only. Data were analyzed using weighted 3/2/1-way ANOVA and the post hoc Scheffé tests (α=.05).
Storage media had no effect on surface roughness and water absorption. Physiological saliva revealed the highest significant impact on solubility followed by artificial saliva, sodium chloride, and distilled water. Water absorption increased significantly with storage duration. PEEK showed the lowest solubility and water absorption values. The highest solubility was observed for the conventional polymer CG, and the highest water absorption was found for the composite LU. PMMA-based TC, ZP, CG, and AT showed the lowest HM and indentation modulus, followed by CT, and PEEK. The highest values were observed for the hybrid material EN, followed by LU and EX.
The hardness parameters of PEEK were comparable with those of PMMA-based materials.
聚醚醚酮（PEEK）可用于支持固定义齿。然而，有关物理力学特性的信息仍然很少。
本体外研究的目的是评估不同老化方案/持续时间对不同计算机辅助设计和计算机辅助制造（CAD/CAM）聚合物的粗糙度、溶解度、吸水性、马氏体硬度（HM）和压痕模量/EIT的影响。
制备了以下材料的40个标准化试件：PEEK：Dentokeep（DK）；混合材料：VITA Enamic（EN）；复合树脂：LAVA Ultimate（LU）和一种实验性CAD/CAM纳米混合复合树脂（EX）；聚甲基丙烯酸甲酯（PMMA）基：VITA CAD-Temp（CT）、Telio CAD（TC）、artBloc Temp（AT）和ZENOTEC ProFix（ZP）。一种用于临时修复的纳米填充聚合物Protemp 4（CG）作为对照组。试件在37℃下分别在氯化钠、人工唾液、生理唾液和蒸馏水中储存1、7、14、28、90和180天。在每个储存期后研究粗糙度、吸水性、HM和EIT；仅在180天后测定溶解度。使用加权3/2/1方差分析和事后Scheffé检验（α=0.05）分析数据。
储存介质对表面粗糙度和吸水性没有影响。生理唾液对溶解度的影响最为显著，其次是人工唾液、氯化钠和蒸馏水。吸水性随储存时间显著增加。PEEK的溶解度和吸水性值最低。传统聚合物CG的溶解度最高，复合树脂LU的吸水性最高。基于PMMA的TC、ZP、CG和AT的HM和压痕模量最低，其次是CT和PEEK。混合材料EN的值最高，其次是LU和EX。
PEEK的硬度参数与基于PMMA的材料相当。
