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首页> 外文期刊>The International journal of oral & maxillofacial implants >Effects of Surface Treatments on Mechanics Behavior of Sintered and Pre-sintered Yttria-Stabilized Zirconia and Reliability of Crowns and Abutments Processed by CAD/CAM
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Effects of Surface Treatments on Mechanics Behavior of Sintered and Pre-sintered Yttria-Stabilized Zirconia and Reliability of Crowns and Abutments Processed by CAD/CAM

机译：表面处理对烧结和烧结前氧化钇稳定的氧化锆的力学行为的影响以及CAD / CAM处理的冠和支座的可靠性

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Purpose: This study evaluated the micro shear bond strength of resin cement to an yttria-stabilized zirconia ceramic and the survival probability of zirconia abutments and crowns after different surface treatments through a fatigue test. Materials and Methods: The study was divided into two parts. For part 1, 95 zirconia disks were divided into five groups (n = 19): control, untreated, airborne particle abrasion with Al2O3 particles before sintering, airborne particle abrasion with Al2O3 particles after sintering, silicatization before sintering, and silicatization after sintering. Three samples of each group were used for evaluation of surface roughness by confocal laser scanning microscopy and afterward were prepared for surface microstructural analysis by scanning electron microscopy. Ten samples of each group were subjected to micro shear bond strength testing, and the interfaces of the remaining six were examined by scanning electron microscopy. In part 2, 70 external hex zirconia abutments and copings were made by computer-aided design/computeraided manufacturing (n = 14). Marginal fit of abutment/coping was measured in a confocal laser scanning microscope. Afterward, a fatigue test was carried out with progressive load of 80 up to 320 N (40 N steps), 5 Hz frequency, and 20,000 cycles at each step. Thermal cycling was simultaneously performed (5 degrees C to 55 degrees C). Results: The group treated after sintering with SiO achieved statistically higher micro shear bond strength (P < .01). Higher failure loads were associated with a combined failure. The surface changes in the group treated with SiO before sintering suggest silica deposition, and there was a lack of homogeneity, which was more evident on the surface of the groups treated before sintering. The marginal gap was higher for the group treated before sintering with SiO (P < .01), and the survival probability of the sets was similar for all tested groups (P = .57). Conclusion: The micro shear bond strength to zirconia was improved after silicatization after sintering, but the survival probability of crown/abutment/implant sets was not affected by different surface treatments.
机译：目的：该研究评估了树脂水泥对氧化钇稳定的氧化锆陶瓷的微剪切粘合强度，并通过疲劳试验在不同表面处理后氧化锆基台和冠的存活概率。材料和方法：该研究分为两部分。对于第1部分，将95个氧化锆盘分为五组（n = 19）：对照，未处理，在烧结前用Al2O3颗粒进行空气传播的颗粒磨损，烧结后的Al 2 O 3颗粒，烧结前的硅化，硅化，硅溶液和硅溶液。每组的三个样品用于通过共聚焦激光扫描显微镜进行表面粗糙度，然后通过扫描电子显微镜进行表面微观结构分析。对每组的10个样品进行微剪切粘合强度试验，通过扫描电子显微镜检查剩余六的界面。在第2部分中，通过计算机辅助设计/电脑制造（n = 14）进行了70个外部十六进制氧化锆基台和应答。在共聚焦激光扫描显微镜中测量邻接/应对的边缘拟合。之后，在每个步骤下，在80至320n（40 n步），5Hz频率和20,000个循环中，进行疲劳试验。同时进行热循环（5℃至55℃）。结果：用SIO烧结后处理的本组均有统计学上更高的微剪切强度（P <.01）。更高的故障载荷与组合的故障相关联。在烧结前用SiO处理的基团的表面变化表明二氧化硅沉积，并且缺乏均匀性，在烧结前处理的基团的表面更明显。在用SiO（p <0.01）烧结前对靶进行的基团的边缘间隙更高，并且该组的存活概率对于所有测试基团相似（p = .57）。结论：在烧结后硅化后，将微剪切粘合强度提高，但冠状纤维化/植入物组的存活概率不受不同的表面处理的影响。

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