de Figueiredo Aldo-Pessoa, Silva Isaias-Donizeti, Miranda Milton-Edson, Vitti Rafael-Pino, Brandt William-Cunha
Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, SP, Brazil.
Department of Implantology, School of Dentistry, University Santo Amaro, São Paulo, SP, Brazil.
J Clin Exp Dent. 2024 Aug 1;16(8):e984-e988. doi: 10.4317/jced.61887. eCollection 2024 Aug.
The aim of this study was to investigate the flexural strength of dental adhesives containing different combinations of photoinitiators systems.
The organic matrix of the experimental adhesives was created using a blend of monomers: 50% by weight bisphenol-A glycidyl methacrylate (BisGMA) and 50% triethylene glycol dimethacrylate (TEGDMA). The photoinitiators utilized were camphorquinone (CQ) and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (BAPO), with diphenyliodonium hexafluorophosphate (DPIHFP) and 2-(Dimethylamino)ethyl methacrylate (DMAEMA) as co-initiators. These photoinitiators and co-initiators were integrated into the organic matrix at a concentration of 0.5% by mass, resulting in the formation of 6 groups (n=12): CQ/DMAEMA (control); CQ/DMAEMA/DPIHFP; BAPO; BAPO/DMAEMA; BAPO/DPIHFP and BAPO/DMAEMA/DPIHFP. Samples measuring 7 mm in length, 2 mm in width, and 1 mm in height were prepared and subjected to a three-point flexural test. Data were analyzed using one-way ANOVA with Tukey's post-hoc test (α=0.05).
Results indicated that groups incorporating BAPO and DPIHFP exhibited higher flexural strength compared to those with CQ and DMAEMA. The BAPO/DPIHFP group achieved the highest mean flexural strength values (<0.001).
These findings suggest that using adhesive systems with alternative photoinitiators and co-initiators can lead to superior flexural strength compared to conventional systems. Photoinitiators, Dentin-bonding agents, Light-curing.
本研究旨在调查含有不同光引发剂体系组合的牙科粘合剂的弯曲强度。
实验粘合剂的有机基质由单体混合物制成：按重量计50%的双酚A甲基丙烯酸缩水甘油酯（BisGMA）和50%的三乙二醇二甲基丙烯酸酯（TEGDMA）。所使用的光引发剂为樟脑醌（CQ）和苯基双（2,4,6-三甲基苯甲酰基）氧化膦（BAPO），以六氟磷酸二苯基碘鎓（DPIHFP）和甲基丙烯酸2-（二甲氨基）乙酯（DMAEMA）作为共引发剂。这些光引发剂和共引发剂以0.5%的质量浓度整合到有机基质中，形成6组（n = 12）：CQ/DMAEMA（对照组）；CQ/DMAEMA/DPIHFP；BAPO；BAPO/DMAEMA；BAPO/DPIHFP和BAPO/DMAEMA/DPIHFP。制备长度为7 mm、宽度为2 mm、高度为1 mm的样品，并进行三点弯曲试验。数据采用单因素方差分析和Tukey事后检验进行分析（α = 0.05）。
结果表明，与含有CQ和DMAEMA的组相比，含有BAPO和DPIHFP的组表现出更高的弯曲强度。BAPO/DPIHFP组获得了最高的平均弯曲强度值（<0.001）。
这些发现表明，与传统体系相比，使用具有替代光引发剂和共引发剂的粘合剂体系可导致更高的弯曲强度。光引发剂、牙本质粘结剂、光固化。
