Sauro Salvatore, Makeeva Irina, Faus-Matoses Vicente, Foschi Federico, Giovarruscio Massimo, Maciel Pires Paula, Martins Moura Maria Elisa, Almeida Neves Aline, Faus-Llácer Vicente
Departamento de Odontologia, Facultad de Ciencias de la Salud, Universidad CEU Cardenal Herrera, 46115 Valencia, SPAIN.
Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia.
Materials (Basel). 2019 Mar 1;12(5):722. doi: 10.3390/ma12050722.
This study aimed at evaluating the microtensile bond strength (MTBS) and fractographic features of dentine-bonded specimens created using universal adhesives applied in etch-and-rinse (ER) or self-etching (SE) mode in combination with modern ion-releasing resin-modified glass-ionomer cement (RMGIC)-based materials after load cycling and artificial saliva aging. Two universal adhesives (FTB: Futurabond M+, VOCO, Germany; SCU: Scotchbond Universal, 3M Oral Care, USA) were used. Composite build-ups were made with conventional nano-filled composite (AURA, SDI, Australia), conventional resin-modified glass ionomer cement (Ionolux VOCO, Germany), or a (RMGIC)-based composite (ACTIVA, Pulpdent, USA). The specimens were divided in three groups and immersed in deionized water for 24 h, load-cycled (350,000 cycles; 3 Hz; 70 N), or load-cycled and cut into matchsticks and finally immersed for 8 months in artificial saliva (AS). The specimens were cut into matchsticks and tested for microtensile bond strength. The results were analyzed statistically using three-way ANOVA and Fisher's LSD post hoc test ( < 0.05). Fractographic analysis was performed through stereomicroscope and FE-SEM. FTB showed no significant drop in bond strength after aging. Unlike the conventional composite, the two RMGIC-based materials caused no bond strength reduction in SCU after load-cycle aging and after prolonged aging (8 months). The SEM fractographic analysis showed severe degradation, especially with composite applied on dentine bonded with SCU in ER mode; such degradation was less evident with the two GIC-based materials. The dentine-bond longevity may be influenced by the composition rather than the mode of application (ER vs. SE) of the universal adhesives. Moreover, the choice of the restorative material may play an important role on the longevity of the finalrestoration. Indeed, bioactive GIC-based materials may contribute to maintain the bonding performance of simplified universal adhesives over time, especially when these bonding systems are applied in ER mode.
本研究旨在评估在进行加载循环和人工唾液老化后，使用以酸蚀冲洗（ER）或自酸蚀（SE）模式应用的通用粘结剂与现代含离子释放的树脂改性玻璃离子水门汀（RMGIC）基材料所制备的牙本质粘结试件的微拉伸粘结强度（MTBS）和断口形貌特征。使用了两种通用粘结剂（FTB：Futurabond M +，VOCO，德国；SCU：Scotchbond Universal，3M口腔护理公司，美国）。复合修复体采用传统纳米填料复合树脂（AURA，SDI，澳大利亚）、传统树脂改性玻璃离子水门汀（Ionolux VOCO，德国）或基于RMGIC的复合树脂（ACTIVA，Pulpdent，美国）制成。将试件分为三组，在去离子水中浸泡24小时，进行加载循环（350,000次循环；3Hz；70N），或将加载循环后的试件切成火柴棍状，最后在人工唾液（AS）中浸泡8个月。将试件切成火柴棍状并测试其微拉伸粘结强度。使用三因素方差分析和Fisher最小显著差异事后检验（<0.05）对结果进行统计学分析。通过体视显微镜和场发射扫描电子显微镜进行断口形貌分析。FTB在老化后粘结强度没有显著下降。与传统复合树脂不同，两种基于RMGIC的材料在加载循环老化和长期老化（8个月）后，SCU的粘结强度没有降低。扫描电子显微镜断口形貌分析显示有严重降解，特别是在ER模式下用SCU粘结牙本质上应用复合树脂时；而两种基于玻璃离子水门汀的材料这种降解不太明显。牙本质粘结的耐久性可能受通用粘结剂的成分而非应用模式（ER与SE）影响。此外，修复材料的选择可能对最终修复体的耐久性起重要作用。实际上，基于生物活性玻璃离子水门汀的材料可能有助于随着时间推移维持简化通用粘结剂的粘结性能，特别是当这些粘结系统以ER模式应用时。
