Abstract：
OBJECTIVE: To evaluate the ability of the water glass treatment to penetrate zirconia and improve the bond strength of resin cement.
METHODS: Water glass was applied to zirconia specimens, which were then sintered. The specimens were divided into water-glass-treated and untreated zirconia (control) groups. The surface properties of the water-glass-treated specimens were evaluated using surface roughness and electron probe micro-analyser (EPMA) analysis. A resin cement was used to evaluate the tensile bond strength, with2 and without a silane-containing primer. After 24 h in water storage at 37 °C and thermal cycling, the bond strengths were statistically evaluated with t-test, and the fracture surfaces were observed using SEM.
RESULTS: The water glass treatment slightly increased the surface roughness of the zirconia specimens, and the EPMA analysis detected the water glass penetration to be 50 μm below the zirconia surface. The application of primer improved the tensile bond strength in all groups. After 24 h, the water-glass-treated zirconia exhibited a tensile strength of 24.8 ± 5.5 MPa, which was significantly higher than that of the control zirconia (17.6 ± 3.5 MPa) (p < 0.05). After thermal cycling, the water-glass-treated zirconia showed significantly higher tensile strength than the control zirconia. The fracture surface morphology was mainly an adhesive pattern, whereas resin cement residue was occasionally detected on the water-glass-treated zirconia surfaces.
CONCLUSIONS: The water glass treatment resulted in the formation of a stable silica phase on the zirconia surface. This process enabled silane coupling to the zirconia and improved the adhesion of the resin cement.
METHODS: Water glass was applied to zirconia specimens, which were then sintered. The specimens were divided into water-glass-treated and untreated zirconia (control) groups. The surface properties of the water-glass-treated specimens were evaluated using surface roughness and electron probe micro-analyser (EPMA) analysis. A resin cement was used to evaluate the tensile bond strength, with2 and without a silane-containing primer. After 24 h in water storage at 37 °C and thermal cycling, the bond strengths were statistically evaluated with t-test, and the fracture surfaces were observed using SEM.
RESULTS: The water glass treatment slightly increased the surface roughness of the zirconia specimens, and the EPMA analysis detected the water glass penetration to be 50 μm below the zirconia surface. The application of primer improved the tensile bond strength in all groups. After 24 h, the water-glass-treated zirconia exhibited a tensile strength of 24.8 ± 5.5 MPa, which was significantly higher than that of the control zirconia (17.6 ± 3.5 MPa) (p < 0.05). After thermal cycling, the water-glass-treated zirconia showed significantly higher tensile strength than the control zirconia. The fracture surface morphology was mainly an adhesive pattern, whereas resin cement residue was occasionally detected on the water-glass-treated zirconia surfaces.
CONCLUSIONS: The water glass treatment resulted in the formation of a stable silica phase on the zirconia surface. This process enabled silane coupling to the zirconia and improved the adhesion of the resin cement.
摘要：
目的：评价水玻璃处理对氧化锆的渗透能力，提高树脂水泥的粘结强度。
方法：将水玻璃应用于氧化锆试样，然后烧结。将样品分成水玻璃处理和未处理的氧化锆(对照)组。使用表面粗糙度和电子探针微分析仪（EPMA）分析评估了水玻璃处理样品的表面性能。使用树脂水泥来评估拉伸粘结强度，有2个，没有含硅烷的底漆。在37°C的水中储存24小时并进行热循环后，粘结强度用t检验进行统计评估，并使用SEM观察断裂表面。
结果：水玻璃处理略微增加了氧化锆试样的表面粗糙度，和EPMA分析检测到水玻璃渗透在氧化锆表面以下50μm。底漆的应用进步了各组的拉伸粘结强度。24小时后，水玻璃处理的氧化锆表现出24.8±5.5MPa的拉伸强度，显著高于对照氧化锆(17.6±3.5MPa)(p<0.05)。热循环后，水玻璃处理的氧化锆显示出比对照氧化锆显著更高的拉伸强度。断口形貌主要为胶粘图案,而在水玻璃处理的氧化锆表面偶尔检测到树脂水泥残留物。
结论:水玻璃处理导致在氧化锆表面上形成稳定的二氧化硅相。该方法能够使硅烷与氧化锆偶联并改善树脂胶结物的粘附性。
方法：将水玻璃应用于氧化锆试样，然后烧结。将样品分成水玻璃处理和未处理的氧化锆(对照)组。使用表面粗糙度和电子探针微分析仪（EPMA）分析评估了水玻璃处理样品的表面性能。使用树脂水泥来评估拉伸粘结强度，有2个，没有含硅烷的底漆。在37°C的水中储存24小时并进行热循环后，粘结强度用t检验进行统计评估，并使用SEM观察断裂表面。
结果：水玻璃处理略微增加了氧化锆试样的表面粗糙度，和EPMA分析检测到水玻璃渗透在氧化锆表面以下50μm。底漆的应用进步了各组的拉伸粘结强度。24小时后，水玻璃处理的氧化锆表现出24.8±5.5MPa的拉伸强度，显著高于对照氧化锆(17.6±3.5MPa)(p<0.05)。热循环后，水玻璃处理的氧化锆显示出比对照氧化锆显著更高的拉伸强度。断口形貌主要为胶粘图案,而在水玻璃处理的氧化锆表面偶尔检测到树脂水泥残留物。
结论:水玻璃处理导致在氧化锆表面上形成稳定的二氧化硅相。该方法能够使硅烷与氧化锆偶联并改善树脂胶结物的粘附性。
