Division of Computerized Restorative Dentistry, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032, Zurich, Switzerland.
Dental Materials Unit, Clinic for Fixed and Removable Prosthodontics and Dental Materials, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032, Zurich, Switzerland.
Clin Oral Investig. 2019 Jun;23(6):2777-2784. doi: 10.1007/s00784-018-2717-2. Epub 2018 Oct 27.
Indirect CAD/CAM restorations can be fabricated using both subtractive and additive CAD/CAM technology. This study investigated the fracture load of crowns fabricated from three particle-filled composite CAD/CAM materials and one 3D-printed composite material.
Lava Ultimate, Cerasmart and Brilliant Crios were used as particle-filled composite CAD/CAM material and els-3D Harz as 3D-printed composite material. For each group, crowns with three different material thicknesses (0.5/1.0/1.5 mm) were fabricated. Control group was composed of ceramic-based CAD/CAM materials e.max CAD and Enamic. Totally, n = 180 crowns were fabricated and adhesively seated on SLA fabricated dies. Thermomechanical loading and fracture testing were performed. The data for fracture loading force were statistically analyzed by two-way ANOVA followed with multiple comparisons by post hoc Tukey's test (α = 0.05).
In contrast to ceramics, all particle-filled composite crowns with 0.5-mm thickness survived fatigue testing. Forces varied statistically significantly. Brilliant Crios showed highest maximum loading force with 1580.4 ± 521.0 N (1.5 mm). Two-way ANOVA indicated that both the material and the thickness affected the fracture load (p < 0.05).
Particle-filled composite resin CAD/CAM materials may have advantageous material characteristics compared to ceramic CAD/CAM materials for minimal restoration thicknesses.
Composite-based CAD/CAM materials may offer new possibilities in minimally invasive restorative treatment concepts.
间接 CAD/CAM 修复体可以使用减法和加法 CAD/CAM 技术制造。本研究调查了三种填充颗粒的复合 CAD/CAM 材料和一种 3D 打印复合材料制成的冠的断裂载荷。
Lava Ultimate、Cerasmart 和 Brilliant Crios 用作填充颗粒的复合 CAD/CAM 材料，els-3D Harz 用作 3D 打印复合材料。对于每组，制备了三种不同材料厚度（0.5/1.0/1.5mm）的冠。对照组由基于陶瓷的 CAD/CAM 材料 e.max CAD 和 Enamic 组成。总共制备了 180 个冠，并将其黏合到 SLA 制作的模具上。进行了热机械加载和断裂测试。通过双向方差分析对断裂载荷力数据进行了统计分析，然后通过事后 Tukey 检验进行了多重比较（α=0.05）。
与陶瓷不同，所有厚度为 0.5mm 的填充颗粒复合冠都通过了疲劳测试。力值具有统计学意义。Brilliant Crios 显示出最高的最大加载力，为 1580.4±521.0N（1.5mm）。双向方差分析表明，材料和厚度都影响了断裂载荷（p<0.05）。
与陶瓷 CAD/CAM 材料相比，填充颗粒的复合树脂 CAD/CAM 材料对于最小修复厚度可能具有有利的材料特性。
基于复合的 CAD/CAM 材料可能为微创修复治疗概念提供新的可能性。
