Costa Daniele Morosini, Somacal Deise Caren, Borges Gilberto Antonio, Spohr Ana Maria
Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.
Department of Restorative Dentistry, Uberaba University, Uberaba, Brazil.
Open Dent J. 2017 Jun 30;11:276-283. doi: 10.2174/1874210601711010276. eCollection 2017.
The aim was to evaluate, , the tensile bond strength to dentin of Scotchbond Universal (SU), All-Bond Universal (AU) and One Coat 7 Universal (OC7) adhesives applied in self-etch mode, after 24 h of storage and after 500,000 loading cycles, using Clearfil SE Bond (SE) as a control.
The adhesives were applied on the dentin of bovine teeth, followed by the application of a composite resin. Thirty specimens were obtained for each adhesive. Half of the specimens were submitted to cyclic loading for 500,000 cycles. All specimens were submitted to a tensile bond strength test in a universal testing machine at a crosshead speed of 0.5 mm/minute.
According to two-way ANOVA and Tukey's test (α=5%), the interaction between the adhesive and cyclic loading factors was significant (p=0.001). The means followed by the same letter represent no significant difference in the bond strength (MPa) after 24 h: OC7=7.86 (±2.90), SU=6.78 (±2.03), AU=5.61 (±2.32), and SE=3.53 (±1.89). After cyclic loading, SE, SU and AU maintained bond strength comparable to 24 h period. There was a significant decrease only for OC7.
SU, AU and OC7 had bond strength to dentin comparable to that of SE. Only OC7 had decreased bond strength to dentin after cyclic loading.
本研究旨在评估自酸蚀模式下应用的Scotchbond通用型（SU）、全粘结通用型（AU）和单涂层7通用型（OC7）粘结剂在储存24小时后以及经过500,000次加载循环后与牙本质的拉伸粘结强度，并以Clearfil SE粘结剂（SE）作为对照。
将粘结剂应用于牛牙的牙本质上，随后应用复合树脂。每种粘结剂制备30个样本。其中一半样本进行500,000次循环加载。所有样本在万能试验机上以0.5毫米/分钟的十字头速度进行拉伸粘结强度测试。
根据双向方差分析和Tukey检验（α = 5%），粘结剂和循环加载因素之间的交互作用显著（p = 0.001）。在24小时后，相同字母后的均值表示粘结强度（MPa）无显著差异：OC7 = 7.86（±2.90），SU = 6.78（±2.03），AU = 5.61（±2.32），SE = 3.53（±1.89）。循环加载后，SE、SU和AU的粘结强度与24小时时相当。只有OC7有显著下降。
SU、AU和OC7与牙本质的粘结强度与SE相当。只有OC7在循环加载后与牙本质的粘结强度下降。
