Prati C, Nucci C, Montanari G
Department of Conservative Dentistry I, University of Bologna, School of Dentistry, Italy.
J Prosthet Dent. 1991 Mar;65(3):401-7. doi: 10.1016/0022-3913(91)90232-l.
This study evaluated the shear bond strength and microleakage of class V non-retentive restorations with 10 different dentin bonding systems. Some were tested with different composite resins. For the shear bond test, eight specimens were prepared for each product and tested in a universal testing machine. For the microleakage test, 158 V-shaped class V cavities extending to the cementoenamel junction were prepared, coated with a dentin bonding system, and restored with a composite resin. After 250 thermocycles, the teeth were immersed in a dye solution for 48 hours, longitudinally sectioned, and evaluated for microleakage. Both test procedures resulted in significant differences between the various materials. The bond strength failed to completely prevent microleakage at the dentinal wall. The new generation of dentin bonding systems offer a significant improvement over previous materials.
本研究评估了使用10种不同牙本质粘结系统的V类非固位修复体的剪切粘结强度和微渗漏情况。部分修复体使用不同的复合树脂进行测试。对于剪切粘结测试，每种产品制备8个样本，并在万能试验机上进行测试。对于微渗漏测试，制备158个延伸至牙骨质釉质界的V形V类洞，用牙本质粘结系统涂布，并用复合树脂修复。经过250次热循环后，将牙齿浸泡在染料溶液中48小时，纵向切片，并评估微渗漏情况。两种测试方法均导致不同材料之间存在显著差异。粘结强度未能完全防止牙本质壁处的微渗漏。新一代牙本质粘结系统较之前的材料有显著改进。
