Tay Franklin R, Pashley David H, Garcìa-Godoy Franklin, Yiu Cynthia K Y
Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital, 34 Hospital Road, Hong Kong SAR, China.
Am J Dent. 2004 Oct;17(5):315-22.
To investigate the existence of potential water-filled channels in resin-dentin interfaces of some single-step, self-etch adhesives.
In Experiment I, Prompt L-Pop (3M ESPE) or an experimental adhesive RZ II (Sun Medical) were bonded to hydrated dentin and then coupled with a light-cured composite that was light-activated immediately upon application. In Experiment II, RZ II and FuturaBond (Voco) were similarly bonded to hydrated dentin. Unfilled resins were coupled in the dark to the bonded dentin using the chemical-cured mode, or light-cured mode with a 20-minute delay before light-activation. Bonded assemblies were challenged with ammoniacal silver nitrate as a tracer and examined with transmission electron microscopy.
In Experiment I, two types of silver patterns were observed within adhesive layers and hybrid layers: interconnecting reticular, finger-like and tree-like patterns that were collectively named "water trees", and discrete silver grains. In Experiment II, apart from the patterns described above, silver-filled water blisters were also observed between the adhesive and the unfilled coupling resin in RZ II. They were linked to the pre-existing "water trees" in the adhesive layers via multiple, short water bridges. In FuturaBond, similar blisters were located between the first adhesive layer and the second adhesive layer that was light-activated after placement of the coupling resin.
研究某些单步自酸蚀粘结剂的树脂-牙本质界面中潜在充水通道的存在情况。
在实验I中，将Prompt L-Pop（3M ESPE）或实验性粘结剂RZ II（Sun Medical）粘结至湿的牙本质，然后与一种光固化复合树脂偶联，该复合树脂在应用后立即进行光活化。在实验II中，将RZ II和FuturaBond（Voco）以类似方式粘结至湿的牙本质。未填充树脂在黑暗中使用化学固化模式或在光活化前延迟20分钟的光固化模式与粘结的牙本质偶联。用硝酸银氨作为示踪剂对粘结组件进行处理，并通过透射电子显微镜检查。
在实验I中，在粘结剂层和混合层内观察到两种类型的银图案：相互连接的网状、指状和树状图案，统称为“水树”，以及离散的银颗粒。在实验II中，除上述图案外，在RZ II的粘结剂与未填充的偶联树脂之间还观察到充满银的水泡。它们通过多个短水桥与粘结剂层中预先存在的“水树”相连。在FuturaBond中，类似的水泡位于第一个粘结剂层与在放置偶联树脂后进行光活化的第二个粘结剂层之间。
