Kimura Tatsuya, Aoyagi Yujin, Taka Norimasa, Kanatani Mitsugu, Uoshima Katsumi
Division of Bio-Prosthodontics, Faculty of Dentistry, Graduate School of Medical and Dental Sciences, Niigata University, 2-5274 Gakkocho-dori, Chuo-ku, Niigata 951-8514, Japan.
Division of Preventive Dentistry, Faculty of Dentistry, Graduate School of Medical and Dental Sciences, Niigata University, 2-5274 Gakkocho-dori, Chuo-ku, Niigata 951-8514, Japan.
J Funct Biomater. 2021 Nov 17;12(4):62. doi: 10.3390/jfb12040062.
Zirconia has been used as a prosthesis material for over a decade because of its excellent mechanical properties and esthetics. The surface treatment for zirconia generally involves sandblasting and the application of primers for favorable bond strength between the surface and resin. However, sandblasting causes the microcracking and chipping of the zirconia surface. To overcome these challenges, the metallization of the zirconia surface was performed. Ti and Au were sputtered on yttria stabilized zirconia (YSZ) disks and heated to 800 °C for 15 min in air. These disks were bonded to stainless-steel rods using resin cement. Then, shear bond strength tests were performed using an Instron-type testing machine. The shear bond strength of the Ti sputtering group was significantly higher than that of the other groups. According to the results of X-ray photoelectron spectroscopy and electron probe microanalysis, the Ti-sputtered YSZ surface contained both sub-titanium oxide and titanium oxide before heating. Sub-titanium oxide was converted to titanium oxide by heating. These results suggest that metallization using Ti is effective for zirconia surface treatment to improve the shear bond strength between YSZ and resin cement. This metallization technique for YSZ has potential in clinical applications.
由于氧化锆具有优异的机械性能和美学特性，它作为一种修复材料已被使用了十多年。氧化锆的表面处理通常包括喷砂处理以及涂覆底漆，以获得表面与树脂之间良好的粘结强度。然而，喷砂会导致氧化锆表面出现微裂纹和碎片。为了克服这些挑战，对氧化锆表面进行了金属化处理。将钛（Ti）和金（Au）溅射在氧化钇稳定氧化锆（YSZ）圆盘上，并在空气中加热至800°C 15分钟。这些圆盘使用树脂粘结剂粘结到不锈钢棒上。然后，使用英斯特朗型试验机进行剪切粘结强度测试。钛溅射组的剪切粘结强度明显高于其他组。根据X射线光电子能谱和电子探针微分析的结果，溅射钛的YSZ表面在加热前同时含有低价钛氧化物和钛氧化物。低价钛氧化物通过加热转化为钛氧化物。这些结果表明，使用钛进行金属化处理对氧化锆表面处理有效，可提高YSZ与树脂粘结剂之间的剪切粘结强度。这种YSZ的金属化技术在临床应用中具有潜力。
