PDF(Pubmed)
Abstract：
This study aimed to evaluate the flexural strength (FS), surface wear, and optical properties of 3D-printed dental resins subjected to different post-printing conditions. A total of 240 specimens (2 × 2 × 25 mm³) were 3D-printed using resin materials for permanent (VaresoSmile Crown Plus) VSC and temporary (VaresoSmile Temp) VST restorations. Specimens underwent five post-printing conditions: no post-printing cure; post-cured in a Form Cure curing unit; Visio Beta Vacuum; Ivoclar Targis; or heat-cured (150 °C) for 30 min. Each group of specimens (n = 24) was tested either directly after post-curing, after 24 h of dry storage, or following hydrothermal accelerated aging in boiling water for 16 h. The three-point bending test was used to evaluate the FS. The two-body wear test was performed on 50 disc-shaped specimens (n = 5/group). Surface gloss and translucency were measured for permanent VSC specimens (n = 5/group). SEM/EDS and statistical analyses were performed. The Form Cure device yielded the highest FS and lowest wear depth (p < 0.05). Hydrothermal aging significantly reduced FS. There were no statistical differences in FS and wear values between materials subjected to same post-printing conditions. VSC groups exhibited similar optical properties across different post-printing treatments. Post-printing treatment conditions had a significant impact on the FS and wear of the 3D-printed resin, while optical properties remained unaffected.
摘要：
本研究旨在评估弯曲强度(FS)，表面磨损,以及经受不同后打印条件的3D打印牙科树脂的光学性能。使用树脂材料3D打印了总共240个标本（2×2×25mm²），用于永久（VaresoSmileCrownPlus）VSC和临时（VaresoSmileTemp）VST修复。样品经历五种印刷后条件:没有印刷后固化;在FormCure固化单元中进行后固化;Visioβ真空;IvoclarTargis;或热固化(150°C)30分钟。每组样品（n=24）在后固化后直接进行测试，干燥储存24小时后，或在沸水中水热加速老化16小时。三点弯曲试验用于评估FS。对50个圆盘形试样(n=5/组)进行了两体磨损试验。测量永久性VSC样品的表面光泽度和半透明性(n=5/组)。进行SEM/EDS和统计分析。成形固化装置产生最高的FS和最低的磨损深度(p<0.05)。水热老化显著降低了FS。经受相同印刷后条件的材料之间的FS和磨损值没有统计学差异。VSC组在不同的印刷后处理中表现出相似的光学性质。打印后处理条件对3D打印树脂的FS和磨损有重大影响，而光学性能不受影响。
