Klarić Eva, Bosnić Josipa Vukelja, Par Matej, Tarle Zrinka, Marovic Danijela
Department of Endodontics and Restorative Dentistry, University of Zagreb School of Dental Medicine, 10000 Zagreb, Croatia.
Private Dental Practice, 10000 Zagreb, Croatia.
Materials (Basel). 2024 May 13;17(10):2297. doi: 10.3390/ma17102297.
This study investigated the effect of 3 s light-curing with a high-power LED curing unit on the shear bond strength of bulk-fill composites. Four bulk-fill composites were bonded to dentin with a universal adhesive (Scotchbond Universal Plus): two materials designed for rapid curing (Tetric PowerFill and Tetric PowerFlow) and two controls (Filtek One Bulk Fill Restorative and SDR Plus Bulk Fill Flowable). The 4 mm composite layer was light-cured with Bluephase PowerCure for 20 s at 1000 mW/cm ("20 s") or for 3 s at 3000 mW/cm ("3 s"). The samples were stored at 37 °C in distilled water and tested after 1, 6 and 12 months. The samples polymerised in the "3 s" mode had statistically similar or higher bond strength than the samples cured in "20 s" mode, except for the Tetric PowerFlow (1 month) and SDR+ (6 month). The flowable materials Tetric PowerFlow and SDR Plus initially showed the highest values in the "3 s" and "20 s" groups, which decreased after 12 months. The bond strength was statistically similar for all materials and curing protocols after 12 months, except for Tetric PowerFill cured with the "3 s" protocol (21.22 ± 5.0 MPa), which showed the highest value. Tetric PowerFill showed the highest long-term bond strength. While "3 s" curing resulted in equal or better shear bond strength, its use can only be recommended for a material with an AFCT agent such as Tetric PowerFill.
本研究调查了使用高功率发光二极管固化单元进行3秒光固化对大块充填复合树脂剪切粘结强度的影响。使用通用粘结剂（Scotchbond Universal Plus）将四种大块充填复合树脂粘结至牙本质：两种设计用于快速固化的材料（Tetric PowerFill和Tetric PowerFlow）以及两种对照材料（Filtek One Bulk Fill Restorative和SDR Plus Bulk Fill Flowable）。4毫米厚的复合树脂层使用Bluephase PowerCure在1000 mW/cm²下光固化20秒（“20秒”）或在3000 mW/cm²下光固化3秒（“3秒”）。将样本在37°C的蒸馏水中储存，并在1、6和12个月后进行测试。除了Tetric PowerFlow（1个月）和SDR+（6个月）外，以“3秒”模式聚合的样本的粘结强度在统计学上与以“20秒”模式固化的样本相似或更高。可流动材料Tetric PowerFlow和SDR Plus最初在“3秒”和“20秒”组中显示出最高值，在12个月后下降。12个月后，除了用“3秒”方案固化的Tetric PowerFill（21.22±5.0 MPa）显示出最高值外，所有材料和固化方案的粘结强度在统计学上相似。Tetric PowerFill显示出最高的长期粘结强度。虽然“3秒”固化导致同等或更好的剪切粘结强度，但仅建议将其用于含有AFCT剂的材料，如Tetric PowerFill。
