Kim Jong-Eun, Kwon Yong-Chan, Kim Sunjai, Park Young-Bum, Shim June-Sung, Moon Hong-Seok
Department of Prosthodontics, Yonsei University College of Dentistry, 50-1 Yonsei-Ro, SeodaemunGu, Seoul 03722, Korea.
CLF Dental Laboratory, 227 Moraenae-ro, Seodaemun Gu, Seoul 03695, Korea.
Materials (Basel). 2021 May 1;14(9):2359. doi: 10.3390/ma14092359.
The aim of this work was to evaluate the effects of application time of an acid mixture solution on the surface roughness, phase transformation, and biaxial flexural strength of 3Y-TZP after sintering or air abrasion. For the biaxial flexural strength measurement, 220 3Y-TZP disk-shaped specimens were prepared after as-sintering or air abrasion. The etching solution comprised a mixture of hydrofluoric acid, sulfuric acid, hydrogen peroxide, methyl alcohol, and purified water. The samples were divided into 11 subgroups according to the etching times (Control, 1, 2, 3, 5, 8, 10, 12, 15, 20, and 30 min). The results showed that acid treatment on both as-sintered and air-abraded 3Y-TZP surfaces increased the surface roughness. However, it had no significant effects on the monoclinic phase or flexural strength of as-sintered zirconia. The monoclinic phase and flexural strength of air-abraded zirconia increased sharply after air abrasion; however, they gradually decreased after acid treatment, to a similar level to the case of the untreated surface. Surface treatment with acid mixture increased the roughness, but the lack of increase of monoclinic phase is thought to be because the loose monoclinic particles remaining on the surface were removed through the etching process.
本研究的目的是评估酸性混合溶液的作用时间对3Y-TZP烧结或空气研磨后表面粗糙度、相变及双轴弯曲强度的影响。为进行双轴弯曲强度测量，在烧结或空气研磨后制备了220个3Y-TZP盘状试样。蚀刻溶液由氢氟酸、硫酸、过氧化氢、甲醇和纯净水混合而成。根据蚀刻时间（对照、1、2、3、5、8、10、12、15、20和30分钟）将样品分为11个亚组。结果表明，对烧结态和空气研磨态的3Y-TZP表面进行酸处理均会增加表面粗糙度。然而，对烧结态氧化锆的单斜相或弯曲强度没有显著影响。空气研磨后的氧化锆单斜相和弯曲强度在空气研磨后急剧增加；然而，酸处理后它们逐渐降低，降至与未处理表面类似的水平。用酸性混合物进行表面处理会增加粗糙度，但单斜相没有增加被认为是因为表面残留的松散单斜颗粒通过蚀刻过程被去除了。
