OBJECTIVES:To evaluate the durability of all-in-one adhesive systems bonded to dentine with and without simulated hydrostatic pulpal pressure (PP). METHODS:Flat dentine surfaces of extracted human molars were prepared. Two all-in-one adhesive systems, One-Up Bond F (OBF) (Tokuyama Corp., Tokyo, Japan), and Fluoro Bond Shake One (FBS) (Shofu Co., Kyoto, Japan) were applied to the dentine surfaces under either a PP of 0 or 15cm H(2)O. Then, resin composite build-ups were made. The specimens bonded under pressure were stored in 37 degrees C water for 24h, 1 and 3 months under 15cm H(2)O PP. Specimens not bonded under pressure were stored under zero PP. After storage, the specimens were sectioned into slabs that were trimmed to hourglass shapes and subjected to micro-tensile bond testing (muTBS). The data were analysed using two-way ANOVA and Holm-Sidak HSD multiple comparison tests (alpha=0.05). RESULTS:The muTBS of OBF fell significantly (p<0.05) when PP was applied during bonding and storage, regardless of storage time. In contrast, although the muTBS of OBF specimens bonded and stored without hydrostatic pressure storage fell significantly over the 3 months period, the decrease was less than half as much as specimens stored under PP. In FBS bonded specimens, although there was no significant difference between the muTBS with and without hydrostatic pulpal pressure at 24h, by 1 and 3 months of storage under PP, significant reductions were seen compared with the control group without PP. CONCLUSION:The muTBS of OBF bonded specimens was lowered more by simulated PP than by storage time; specimens bonded with FBS were not sensitive to storage time in the absence of PP, but showed lower bond strengths at 1 and 3 months in the presence of PP.

译文

目的:评估在有和没有模拟静水牙髓压(PP)的情况下粘合到牙本质的多合一粘合剂体系的耐久性。
方法:制备人牙磨牙的平面牙本质表面。在牙本质表面上使用了两种多合一粘合剂系统,即One-up Bond F(OBF)(日本东京Tokuyama公司)和Fluoro Bond Shake One(FBS)(日本京都Shofu Co.)。在0或15cm H(2)O的PP下。然后,制成树脂复合材料。在压力下粘合的样品在15cm H(2)O PP下于37摄氏度的水中存储24h,1和3个月。未在压力下粘合的样品存储在零PP下。储存后,将标本切成薄片,将其修整为沙漏形状,并进行微拉伸粘合力测试(muTBS)。使用双向方差分析和Holm-Sidak HSD多重比较测试(α= 0.05)分析数据。
结果:在粘结和储存过程中,无论储存时间如何,使用PP时,OBF的muTBS均显着下降(p <0.05)。相比之下,虽然在没有静水压力存储的情况下粘合和存储的OBF标本的muTBS在3个月内显着下降,但下降幅度不到在PP下存储的标本的一半。在FBS粘结的标本中,尽管在24h下有和没有静水纸浆压力的muTBS之间没有显着差异,但在PP下储存1和3个月时,与未使用PP的对照组相比,观察到显着降低。
结论:模拟PP降低了OBF粘结样品的muTBS,而不是保存时间降低了。在没有PP的情况下,用FBS粘结的样品对储存时间不敏感,但是在有PP的情况下,在1个月和3个月时,其粘结强度较低。

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