Department of Restorative Dentistry, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil.
Oper Dent. 2010 Jan-Feb;35(1):29-36. doi: 10.2341/08-065-L.
This study evaluated the effect of a warm (W) or cold (C) air-dry stream for solvent evaporation on the immediate (IM) and six-month (6M) resin-dentin bond strength (microTBS) and silver nitrate uptake pattern (SNU) of two-step etch-and-rinse adhesive system (Adper Single Bond [SB] and Prime & Bond 2.1 [PB]). The adhesives were applied on demineralized dentin surfaces and a warm or cold air-dry stream (10 seconds) was applied followed by light-activation (10 seconds). After 24-hours of water storage, the specimens were serially sectioned in the "x" and "y" directions to obtain bonded sticks around 0.8 mm2 to be tested immediately or after six months of water storage. The specimens at each period were immersed in a 50% solution of silver nitrate, photodeveloped and analyzed by SEM for SNU. Higher IM microTBS values were observed for SB under W conditions. Both adhesives showed reductions in microTBS after 6M in both air temperatures. Regarding SEM, a low silver nitrate uptake was observed in the W groups either in IM or 6M for both adhesives.
本研究评估了在溶剂蒸发过程中使用热（W）或冷（C）风干气流对两步酸蚀-冲洗型粘结剂系统（Adper Single Bond [SB] 和 Prime & Bond 2.1 [PB]）的即刻（IM）和六个月（6M）树脂-牙本质粘结强度（微拉伸粘结强度，microTBS）和硝酸银摄取模式（SNU）的影响。将粘结剂应用于脱矿质牙本质表面，然后使用热或冷风干气流（10 秒）进行干燥，随后进行光固化（10 秒）。水储存 24 小时后，将样本沿“x”和“y”方向连续切片，获得约 0.8mm2的粘结条，立即进行测试或在水储存六个月后进行测试。在每个时间段的样本均浸入 50%的硝酸银溶液中，进行光显影，并用 SEM 分析 SNU。在 W 条件下，SB 的即刻 microTBS 值较高。两种粘结剂在两种空气温度下的 6M 时，microTBS 值均降低。关于 SEM，在 W 组中，两种粘结剂的即刻或 6M 时均观察到硝酸银摄取量较低。
