Celikel Peris, Sengul Fatih
Faculty of Dentistry, Ataturk University, Erzurum, Turkey.
Odontology. 2025 Jan;113(1):156-162. doi: 10.1007/s10266-024-00956-8. Epub 2024 May 29.
This study evaluated the effect of different post-curing cycles on the Vickers hardness, color change, and translucency value of 3D printed methacrylic acid ester-based temporary and permanent crown resins. A total of 300 samples were printed in disk shape (ø:8 mm, thickness: 2 mm) using VarseoSmile Crown Plus (VSC) and VarseoSmile Temp (VST) materials from a 3D printer. These disks were divided into five subgroups (n = 30 each) based on flash-curing cycles (0, 750, 1500, 2250, and 3000). Surface hardness tests and color tests were conducted on both the green state and flash-cured groups. The data were analyzed using univariate analysis of variance (ANOVA). The hardness of 3D printed temporary and permanent crown resin increased with post-curing time. Compared to the post-curing cycle recommended by the manufacturer, no clinically significant color change (ΔE ≥ 2.25) was observed in any of the polymerized groups. It was determined that permanent crown material had a more translucent structure than temporary crown material. The interaction between material and post-curing had significant effects on surface hardness, color (ΔE), and translucency of 3D printed methacrylic acid ester-based resins.
本研究评估了不同后固化周期对3D打印甲基丙烯酸酯基临时和永久冠树脂的维氏硬度、颜色变化及半透明值的影响。使用3D打印机，采用VarseoSmile Crown Plus（VSC）和VarseoSmile Temp（VST）材料共打印了300个圆盘状样本（直径：8毫米，厚度：2毫米）。这些圆盘根据快速固化周期（0、750、1500、2250和3000）分为五个亚组（每组n = 30）。对绿色状态组和快速固化组均进行了表面硬度测试和颜色测试。数据采用单因素方差分析（ANOVA）进行分析。3D打印的临时和永久冠树脂的硬度随后固化时间增加。与制造商推荐的后固化周期相比，在任何聚合组中均未观察到临床上显著的颜色变化（ΔE≥2.25）。确定永久冠材料比临时冠材料具有更半透明的结构。材料与后固化之间的相互作用对3D打印甲基丙烯酸酯基树脂的表面硬度、颜色（ΔE）和半透明性有显著影响。
