Abstract
In recent years, zirconia ceramics have been widely used as in prosthodontics because of their good aesthetics and mechanical properties. At present, the thermal acid etching technology for treating zirconia ceramics has gradually emerged as a new method. In this study, the effect of thermal acid etching surface treatment on the shear strength and flexural properties was investigated. In the fourth sentence, it might be clearer to specify that the zirconia ceramics were divided into five groups: "In the experiment, the zirconia ceramics were divided into five groups, each receiving a different treatment: blank, 110µm alumina sandblasting, 10-minute thermal acid etching, 30-minute thermal acid etching, and 60-minute thermal acid etching.The surface morphology, crystal structure, and the initial shear bonding strength of zirconia were analyzed by scanning electron microscope (SEM), X-ray diffractometer (XRD), and Instron3345 micro-force testing machine, respectively.SPSS19.0 software was used for the statistical analysis of experimental data, and the statistical difference was set as P < 0.05. The experimental results show that the thermal acid etching technology can effectively increase the surface roughness of zirconia and the shear bonding strength of zirconia and resin adhesive, the effect is obviously better than that of sandblasting, and there is no obvious correlation with the time of technology. This conclusion is of significant importance for guiding oral clinical treatment.