Department of Prosthodontics, Faculty of Dentistry, Firat University, Elazig, Turkey,
Department of Prosthodontics, Faculty of Dentistry, Inonu University, Malatya, Turkey.
Am J Dent. 2022 Aug;35(4):167-171.
To evaluate the fracture strength of polyetheretherketone (PEEK) single crowns veneered with different materials produced by computer-aided design (CAD)-computer-aided manufacture (CAM) after aging.
60 stainless-steel master dies were prepared with a 1 mm-wide deep chamfer. Sixty PEEK frameworks were produced with a CAD-CAM system for the right maxillary first molar tooth on the dies. PEEK frameworks were divided into six groups (n= 10) according to veneering materials (five CAD-CAM materials and a resin composite). Group ZR: monolithic zirconia (Upcera ST-Color); Group EC: lithium disilicate glass-ceramic (IPS e.max CAD); Group LU: resin nano-ceramic (Lava Ultimate); Group VM: feldspathic ceramic (Vitablocs Mark II); Group VS: zirconia-reinforced lithium silicate glass-ceramic (VITA Suprinity); and Group CR: indirect resin composite (Gradia). All samples were subjected to a fracture strength test in a universal test device after thermo-mechanical aging and then the results were analyzed statistically using one-way ANOVA and Tukey's post hoc test. In addition, post-fracture analyses of all samples were performed with a stereomicroscope.
The differences in fracture strength values of different veneer materials in single crowns with a PEEK framework were statistically significant (P< 0.05). Fracture strength was highest in Group ZR (1665 N), followed by Groups LU (1440 N), EC (1249 N), CR (918 N), VS (754 N), and VM (655 N).
PEEK frameworks may have the potential to be used with many veneer materials of different content and properties in fixed partial prostheses.
评估经计算机辅助设计（CAD）-计算机辅助制造（CAM）制作的聚醚醚酮（PEEK）单冠，在老化后用不同材料进行饰面的断裂强度。
用 1 毫米宽深倒角制备 60 个不锈钢母模。用 CAD-CAM 系统在母模上制作 60 个右侧上颌第一磨牙的 PEEK 基台。根据饰面材料（五种 CAD-CAM 材料和一种树脂复合材料）将 PEEK 基台分为六组（每组 n=10）。组 ZR：整体氧化锆（Upcera ST-Color）；组 EC：锂硅二酸盐玻璃陶瓷（IPS e.max CAD）；组 LU：树脂纳米陶瓷（Lava Ultimate）；组 VM：长石质陶瓷（Vitablocs Mark II）；组 VS：氧化锆增强锂硅玻璃陶瓷（VITA Suprinity）；组 CR：间接树脂复合材料（Gradia）。所有样本在热机械老化后在万能试验机上进行断裂强度测试，然后使用单向方差分析和 Tukey 事后检验对结果进行统计学分析。此外，对所有样本的断裂后分析均在立体显微镜下进行。
不同饰面材料的 PEEK 基台单冠的断裂强度值存在显著差异（P<0.05）。组 ZR 的断裂强度最高（1665 N），其次是组 LU（1440 N）、组 EC（1249 N）、组 CR（918 N）、组 VS（754 N）和组 VM（655 N）。
PEEK 基台可能具有在固定局部义齿中使用不同含量和性质的多种饰面材料的潜力。
