Department of Dental Materials and Fixed Prosthodontics, Tuscan School of Dental Medicine, University of Florence and Siena, Italy.
J Adhes Dent. 2012 Feb;14(1):51-7. doi: 10.3290/j.jad.a21849.
To assess whether the polymerization extent of cement is influenced by curing mode of the adhesive and/or by photoactivation of the cement.
One hundred five root segments were prepared from endodontically treated teeth. After post space preparation, the root segments were randomly divided into 7 groups, based on the cementation procedure to lute RelyX Fiber Posts (3M ESPE): 1. Variolink II (V, Ivoclar Vivadent); 2. V light-cured (LC); 3. Excite LC (ELC, Ivoclar Vivadent)/V; 4. ELC/V LC; 5. ELC-V LC (One Shot); 6. Excite DSC (EDSC)/V; 7. EDSC-V LC (One Shot). Each root segment was submitted to the acetone shake test to remove the unpolymerized resin and then cut longitudinally. On each half, the extent of cure of the cement was measured with image analysis software.
The deepest and basically complete polymerization was obtained with EDSC (groups 6 and 7), regardless of whether light curing was performed. The extent of polymerization was most limited when adhesive was not applied (groups 1 and 2), or when ELC was only light cured, while V was allowed to auto-cure (group 3). With the one-shot polymerization of ELC and V (group 5), the extent of polymerization was similar to the procedure involving separate irradiation of adhesive and cement (group 4). The one-shot technique was significantly more effective if EDSC was used (group 6).
The use of a self-activating dual-curing adhesive system in combination with a dual-curing cement enables effective luting of FRC posts regardless of the amount of light transmitted through the post.
评估粘结剂的固化方式和/或水泥的光激活是否会影响水泥的聚合程度。
从牙髓治疗过的牙齿中制备了 105 个根管段。在进行桩腔预备后，根据将 RelyX Fiber Posts（3M ESPE）粘固的程序，将根管段随机分为 7 组：1. Variolink II（V，义获嘉伟瓦登特）；2. V 光固化（LC）；3. Excite LC（ELC，义获嘉伟瓦登特）/V；4. ELC/V LC；5. ELC-V LC（一次法）；6. Excite DSC（EDSC）/V；7. EDSC-V LC（一次法）。每个根管段都进行了丙酮摇动试验以去除未聚合的树脂，然后进行纵向切割。在每个半根管段上，使用图像分析软件测量水泥的固化程度。
无论是否进行光固化，EDSC（第 6 组和第 7 组）都获得了最深和基本完全的聚合。如果不使用粘结剂（第 1 组和第 2 组），或者仅对 ELC 进行光固化，而允许 V 自固化（第 3 组），则聚合程度受到的限制最大。使用 ELC 和 V 的一次法聚合（第 5 组）时，聚合程度与单独照射粘结剂和水泥的程序相似（第 4 组）。如果使用 EDSC，则一次法技术更为有效（第 6 组）。
使用自固化双固化粘结剂系统结合双固化水泥，无论通过桩传递的光量如何，都能有效地粘固 FRC 桩。
