Pimentel de Oliveira Roberta, de Paula Brennda Lucy, Ribeiro Mara Eliane, Alves Eliane, Costi Hilton Túlio, Silva Cecy
School of Dentistry, Federal University of Pará, Belém 66075-110, Brazil.
Institutional Scanning Electron Microscopy Laboratory, Emílio Goeldi Paraense Museum, Belém 66077-530, Brazil.
Int J Dent. 2022 Jun 10;2022:5756649. doi: 10.1155/2022/5756649. eCollection 2022.
The aim of this study was to assess the bond strength of self-etching adhesives containing HEMA and 10-MDP monomers. Twenty-four bovine teeth were divided into three groups. Two cylinders of composite resin were made in each tooth ( = 16): G1-Prime and Bond Universal (control); G2-OptiBond All-in-One (HEMA); and G3-Clearfil SE (10-MDP and HEMA). After 24-hour storage in distilled water, the specimens were fixed to a universal testing machine (Kratos Equipamentos Ltda.) for the microshear test at a speed of 0.5 mm/min. A qualitative analysis of the fracture pattern was also performed using scanning electron microscopy (500× magnification). The normality of sample data distribution was determined using the Shapiro-Wilk test. The results were assessed using the Kruskal-Wallis test, and level of 5% was used for the analysis. The results indicated a statistical difference ( > 0.05) between G3 (15.6080 MPa) and G2 (11.2180 MPa). No statistical difference was observed when G1 (14,6325 MPa) was compared with the other two groups. It was also observed that a mixed fracture pattern was predominant in all groups. The self-etching adhesive containing HEMA and 10-MDP monomers showed to be promising in increasing the bond strength between the dental substrate and the composite resin, whereas the adhesive containing only HEMA exhibited lower bond strength to dentin.
本研究的目的是评估含有甲基丙烯酸羟乙酯（HEMA）和10-甲基丙烯酰氧癸基二氢磷酸酯（10-MDP）单体的自酸蚀粘结剂的粘结强度。将24颗牛牙分为三组。每颗牙制作两个复合树脂圆柱体（n = 16）：G1组——Prime and Bond Universal（对照组）；G2组——OptiBond All-in-One（含HEMA）；G3组——Clearfil SE（含10-MDP和HEMA）。在蒸馏水中储存24小时后，将标本固定在万能材料试验机（Kratos Equipamentos Ltda.）上，以0.5毫米/分钟的速度进行微剪切试验。还使用扫描电子显微镜（放大500倍）对断裂模式进行了定性分析。使用夏皮罗-威尔克检验确定样本数据分布的正态性。结果采用克鲁斯卡尔-沃利斯检验进行评估，分析使用的显著性水平为5%。结果表明，G3组（15.6080兆帕）和G2组（11.2180兆帕）之间存在统计学差异（P > 0.05）。将G1组（14.6325兆帕）与其他两组进行比较时，未观察到统计学差异。还观察到，所有组中混合断裂模式占主导。含有HEMA和10-MDP单体的自酸蚀粘结剂在提高牙体基质与复合树脂之间的粘结强度方面显示出前景，而仅含HEMA的粘结剂对牙本质的粘结强度较低。
