Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University at Kiel, Germany; Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Egypt.
Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University at Kiel, Germany.
J Mech Behav Biomed Mater. 2018 Oct;86:84-88. doi: 10.1016/j.jmbbm.2018.06.027. Epub 2018 Jun 20.
Aim of this study was to evaluate the tensile bond strength (TBS) between resin cement and zirconia surface treated in different sintering stages.
Eighty zirconia discs having final dimensions of 12 mm diameter and 3.2 mm thickness were milled then divided into three main groups according to the type of surface treatment performed (group 1: air abrasion using 50 µm AlO particles, group 2: silica coating using Rocatec soft, and group 3: a control group receiving no surface treatment). Groups 1 and 2 were divided into two subgroups each according to the stage in which the surface treatment was performed (subgroup A; surface treatment performed in the pre-sintered stage and subgroup B; surface treatment performed in the post-sintered stage). Discs were later bonded to composite core materials using resin cement then tested for TBS either being subjected to 3 days of water storage or 150 days of water storage and 37,500 thermal cycles.
Long-term aging caused a significant decrease in TBS of all subgroups except the subgroup air-abraded in the post-sintered stage. After long-term aging, the group silica coated in the pre-sintered stage showed the significantly lowest TBS compared to all other groups. There was also no significant difference between the subgroups air-abraded and silica coated in the pre-sintered stage. All specimens in the control group debonded during long-term aging.
Air-abrading zirconia with AlO at a reduced pressure in the pre-sintered stage may result in durable bond strength to resin cement.
本研究旨在评估不同烧结阶段处理的氧化锆表面与树脂水门汀之间的拉伸结合强度（TBS）。
共 80 个氧化锆圆盘，最终尺寸为 12mm 直径和 3.2mm 厚度，经过铣削加工，然后根据表面处理类型分为三个主要组：（1）使用 50μm AlO 颗粒进行喷丸处理的组，（2）使用 Rocatec 软质材料进行硅涂层处理的组，（3）未进行表面处理的对照组。组 1 和 2 各分为两个亚组，根据表面处理的阶段（亚组 A：在预烧结阶段进行表面处理，亚组 B：在烧结后阶段进行表面处理）。将圆盘用树脂水门汀粘结到复合芯材料上，然后进行 TBS 测试，要么进行 3 天的水储存，要么进行 150 天的水储存和 37500 次热循环。
除了在烧结后阶段进行喷丸处理的亚组之外，长期老化导致所有亚组的 TBS 均显著降低。经过长期老化后，在预烧结阶段进行硅涂层处理的组的 TBS 明显低于其他所有组。在预烧结阶段进行喷丸处理和硅涂层处理的亚组之间也没有显著差异。对照组的所有样本在长期老化过程中均发生脱粘。
在预烧结阶段使用 AlO 在减压下对氧化锆进行喷丸处理可能会导致与树脂水门汀具有持久的结合强度。
