J Adhes Dent. 2019;21(1):87-95. doi: 10.3290/j.jad.a41974.
The purpose of this in vitro study was to compare the shear bond strength of different universal adhesives to enamel and dentin with and without additional phosphoric acid etching before and after thermocycling (TC).
The mesial, distal, lingual, and buccal surfaces of the teeth were ground flat to expose two enamel areas and two dentin areas. Specimens were randomly divided into 36 groups (n = 10). Four adhesives were tested: Scotchbond Universal (SBU), Prime & Bond Elect (PBE), All-Bond Universal (ABU), and iBond Universal (IBU). The application was performed in the self-etch mode (SE) or in the etch-and-rinse mode (ER). Optibond FL (OFL) was used as an etch-and-rinse control. After composite buildups were made, half of the groups were tested before and the other half after TC. The failure mode was evaluated using a light microscope.
In enamel, mean bond strengths ranged from 13.4 to 21.9 MPa in the SE mode before TC. When used as an ER adhesive, mean bond strengths exceeded 30 MPa. TC did not influence the mean bond strengths in either application mode. Regarding dentin, significant differences in the SE mode were adhesive dependent. Differences were only detected between SBU and IBU before TC and were not present after TC. When SBU, PBE, and ABU were used as ER adhesives, no differences were detected before TC. TC only affected IBU when compared to the other adhesives.
Universal adhesives benefit from phosphoric acid etching, as bond strengths increased especially at enamel surfaces.
本体外研究的目的是比较不同通用型粘结剂在热循环（TC）前后有无额外磷酸酸蚀对牙釉质和牙本质的粘结强度。
牙齿的近中、远中、舌侧和颊侧表面被磨平，以暴露两个牙釉质区域和两个牙本质区域。标本被随机分为 36 组（n = 10）。测试了 4 种粘结剂： Scotchbond Universal（SBU）、Prime & Bond Elect（PBE）、All-Bond Universal（ABU）和 iBond Universal（IBU）。应用于自酸蚀模式（SE）或酸蚀-冲洗模式（ER）。Optibond FL（OFL）用作酸蚀-冲洗对照。在进行复合堆积后，一半的组在 TC 前进行测试，另一半在 TC 后进行测试。使用光显微镜评估失效模式。
在牙釉质中，TC 前 SE 模式的平均粘结强度为 13.4 至 21.9 MPa。当用作 ER 粘结剂时，平均粘结强度超过 30 MPa。TC 对两种应用模式下的平均粘结强度均无影响。关于牙本质，SE 模式下的差异与粘结剂有关。TC 前，仅在 SBU 和 IBU 之间存在差异，TC 后则不存在。当 SBU、PBE 和 ABU 用作 ER 粘结剂时，TC 前未检测到差异。与其他粘结剂相比，TC 仅影响 IBU。
通用粘结剂受益于磷酸酸蚀，因为粘结强度增加，尤其是在牙釉质表面。
