Ren Zhiwei, Wang Ruili, Zhu Meifang
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
Heliyon. 2024 Jul 26;10(15):e35226. doi: 10.1016/j.heliyon.2024.e35226. eCollection 2024 Aug 15.
This work aimed to assess the bonding performance of universal adhesive and self-etch adhesives, and a comparative study was conducted using the same acid etching mode.
The selective acid-etching mode was used to simulate bonded restorations to teeth defects of isolated human molars including enamel and dentin. Microtensile bond strength and microleakage of all adhesives were tested and compared after 24 h and 5000 thermocycles, respectively. The morphology of the adhesive interfaces was observed by scanning electron microscopy (SEM) and fluorescent staining.
The bond strength and microleakage of Single Bond Universal (SBU) adhesive are comparable to those of self-etch adhesives, although Clearfil Tri-S Bond (S3) exhibited significantly lower bond strength compared to other two self-etch groups evaluated. No significant differences were found in the microleakage resistance of these four adhesives, suggesting their similar effectiveness in sealing the margins of the restorations, although SBU showed the highest resistance of microleakage. The SEM and fluorescent staining results of the resin-dentin interfaces further revealed the formation of abundant resin tags for all adhesives.
Self-etch adhesives evaluated in this study performed similarly to universal adhesives in selective acid-etch mode for bond strength and microleakage resistance. Both types of adhesives exhibited effective penetration capabilities into the dentinal tubules.
During the adhesion processes involving both dentin and enamel, self-etch adhesives can serve as alternatives to universal adhesives in selective acid-etch mode.
本研究旨在评估通用型粘结剂和自酸蚀粘结剂的粘结性能，并采用相同的酸蚀模式进行对比研究。
采用选择性酸蚀模式模拟粘结修复体修复离体人磨牙包括釉质和牙本质的牙体缺损。分别在24小时和5000次热循环后测试并比较所有粘结剂的微拉伸粘结强度和微渗漏情况。通过扫描电子显微镜（SEM）和荧光染色观察粘结界面的形态。
单键通用型（SBU）粘结剂的粘结强度和微渗漏与自酸蚀粘结剂相当，尽管与其他两组评估的自酸蚀粘结剂相比，Clearfil Tri-S Bond（S3）的粘结强度显著较低。这四种粘结剂在抗微渗漏方面未发现显著差异，表明它们在封闭修复体边缘方面效果相似，尽管SBU表现出最高的抗微渗漏能力。树脂-牙本质界面的SEM和荧光染色结果进一步显示所有粘结剂均形成了丰富的树脂突。
本研究中评估的自酸蚀粘结剂在选择性酸蚀模式下的粘结强度和抗微渗漏性能与通用型粘结剂相似。两种类型的粘结剂均表现出有效渗透到牙本质小管中的能力。
在涉及牙本质和釉质的粘结过程中，自酸蚀粘结剂在选择性酸蚀模式下可作为通用型粘结剂的替代品。
