Degirmenci Alperen, Unalan Degirmenci Beyza
Department of Restorative Dentistry, University of Van Yuzuncu Yil, 65090 Van, Turkey.
Department of Prosthodontics, University of Van Yuzuncu Yil, 65090 Van, Turkey.
Polymers (Basel). 2024 Aug 2;16(15):2212. doi: 10.3390/polym16152212.
This study aims to evaluate the repair micro-shear bond strength of the CAD/CAM resin nanoceramic block treated using four different surface treatments and composite resins of different viscosities. For the current study, 96 samples with dimensions of 14 × 12 × 2 mm were obtained from a CAD/CAM resin nanoceramic block (Cerasmart) with a low-speed precision cutting saw under water cooling. The relevant samples were randomly divided into four groups according to the surface treatment processes: grinding with diamond bur, aluminum oxide airborne-particle abrasion, long-pulse laser, and short-pulse laser. Following silane application, universal adhesive was applied to all surface-treated samples and cured with an LED for 10 s. The samples prepared for the repair procedure were divided into two subgroups (microhybrid composite and injectable composite) according to the viscosity of the repair material to be used ( = 12). After the repair procedure, care was taken to keep the samples in distilled water in an incubator at 37 °C for 24 h. The repair micro-shear bond strength values (μSBSs) of CAD/CAM resin nanoceramic-composite resin complexes were tested. In addition, randomly selected samples from each group were examined with a scanning electron microscope to evaluate the surface topography after both surface treatments and the micro-shear bond strength test. Data were analyzed by two-way ANOVA and Bonferroni test. It was determined that the surface treatment preferred in the repair protocol significantly affected the μSBS value ( < 0.001). While the highest μSBS value was obtained with the short-pulse laser airradiation group, the lowest μSBS values were found in samples with long pulse laser irradiation. However, samples grinded with a bur and airborne-particle abrasion showed similar μSBS values ( > 0.05). The preferred composite viscosity in the repair procedure has a significant effect on the μSBS value ( < 0.001). However, the interaction between the surface treatment and the viscosity of the repair composite does not affect the μSBS values in a statistically significant way ( = 0.193). It may be recommended to clinicians to repair CAD/CAM resin nanoceramic restoration surfaces with injectable composites or after treatment with short-pulse lasers.
本研究旨在评估经四种不同表面处理的CAD/CAM树脂纳米陶瓷块与不同粘度复合树脂的修复微剪切粘结强度。在本研究中，使用低速精密切割锯在水冷条件下从CAD/CAM树脂纳米陶瓷块（Cerasmart）获取96个尺寸为14×12×2 mm的样本。根据表面处理工艺，将相关样本随机分为四组：用金刚石车针打磨、氧化铝空气颗粒研磨、长脉冲激光处理和短脉冲激光处理。在应用硅烷后，对所有经表面处理的样本施加通用粘结剂并用LED固化10秒。根据待使用的修复材料粘度（ = 12），将准备进行修复程序的样本分为两个亚组（微混合复合树脂和可注射复合树脂）。修复程序完成后，小心地将样本置于37°C培养箱中的蒸馏水中24小时。测试CAD/CAM树脂纳米陶瓷 - 复合树脂复合物的修复微剪切粘结强度值（μSBSs）。此外，从每组中随机选择样本，用扫描电子显微镜检查，以评估表面处理和微剪切粘结强度测试后的表面形貌。数据采用双向方差分析和Bonferroni检验进行分析。结果确定，修复方案中首选的表面处理对μSBS值有显著影响（ < 0.001）。短脉冲激光空气辐照组获得的μSBS值最高，而长脉冲激光辐照的样本中μSBS值最低。然而，用车针打磨和空气颗粒研磨的样本显示出相似的μSBS值（ > 0.05）。修复程序中首选的复合树脂粘度对μSBS值有显著影响（ < 0.001）。然而,表面处理与修复复合树脂粘度之间的相互作用对μSBS值没有统计学上的显著影响（ = 0.193）。建议临床医生使用可注射复合树脂或在短脉冲激光处理后修复CAD/CAM树脂纳米陶瓷修复体表面。
