J Adhes Dent. 2018;20(5):453-459. doi: 10.3290/j.jad.a41330.
To evaluate the bonding efficacy of 4-META/MMA-TBB resin to highly translucent zirconia subjected to various surface treatments.
Highly translucent zirconia specimens (Zpex Smile, Tosoh; 11.5 mm diameter, 5.0 mm thick) were mechanically pre-treated to improve micromechanical interlocking either by sandblasting with 50-µm Al2O3 particles (Kulzer Japan) or subjecting the specimens to a low-pressure plasma treatment (PM100, Yamato), or evaluated using the as-sintered surfaces as controls. Next, specimens from each condition were primed with an MDP-containing primer (PZ Primer, Sun Medical), while some remained unprimed. All specimens were bonded to stainless rods using 4-META/MMA-TBB resin (Super-Bond, Sun Medical). The specimens were stored in ultrapure water at 37°C for 24 h, after which a portion were subjected to 10,000 thermocycles. For all specimens (n=10/group) the tensile bond strength (TBS) was determined with a universal testing machine. The measured values were statistically analyzed using Weibull analysis. Fractographic analysis was performed using a light microscope and an SEM.
After aging, Weibull analysis revealed significantly lower bond strengths for both as-sintered and plasma-treated zirconia without a primer treatment. The fractographic analysis showed that these two conditions resulted in a higher frequency of adhesive failure.
Chemical pre-treatment with an MDP-containing primer improved bonding efficacy of 4-META/MMA-TBB resin to highly translucent zirconia. In addition, Al2O3 sandblasting resulted in durable bonding of 4-META/MMA-TBB resin to highly translucent zirconia, regardless of chemical pre-treatment.
评估 4-META/MMA-TBB 树脂对经过不同表面处理的高度半透明氧化锆的粘结效果。
对高度半透明氧化锆试件（Zpex Smile，Tosoh；直径 11.5mm，厚 5.0mm）进行机械预处理，以通过用 50-μm Al2O3 颗粒（Kulzer Japan）喷砂或对试件进行低压等离子体处理（PM100，Yamato）来改善微观机械锁合，或作为对照使用烧结后的表面。然后，用含 MDP 的底漆（PZ Primer，Sun Medical）对每种条件下的试件进行底漆处理，而有些试件则不进行底漆处理。所有试件均使用 4-META/MMA-TBB 树脂（Super-Bond，Sun Medical）粘结到不锈钢棒上。将试件在 37°C 的超纯水中储存 24 h 后，一部分进行 10000 次热循环。对所有试件（n=10/组）进行万能试验机拉伸粘结强度（TBS）测试。使用 Weibull 分析对测量值进行统计学分析。使用光学显微镜和 SEM 进行断口形貌分析。
老化后，Weibull 分析显示未经底漆处理的烧结和等离子体处理氧化锆的粘结强度显著降低。断口形貌分析表明这两种情况导致了更高频率的粘聚性失效。
用含 MDP 的底漆进行化学预处理可提高 4-META/MMA-TBB 树脂对高度半透明氧化锆的粘结效果。此外，Al2O3 喷砂处理可使 4-META/MMA-TBB 树脂与高度半透明氧化锆形成持久的粘结，而与化学预处理无关。
