纳米硅涂层对钛瓷结合强度的影响

Effect of silicon coating on bonding strength of ceramics and titanium

目的探讨纯钛表面纳米硅涂层改性对钛瓷结合强度的影响。方法将16个纯钛试件(25mm×3mm×0.5mm)平均分为2组,A组用溶胶-凝胶法在表面形成钠米硅涂层,B组不作处理。在试件中份烧结Vita Titankeramik瓷粉,测试钛瓷间的三点弯曲结合强度;对钛瓷结合界面和分离界面进行扫描电子显微镜观察,对钛瓷结合界面进行X射线能谱分析;并用X射线衍射分析仪分析涂层结构。结果A组钛瓷结合界面的硅元素明显增加,钛瓷结合强度为(37.768±0.777)MPa,明显大于B组的结合强度(29.483±1.007)MPa,其差异有统计学意义(P=0.000)。扫描电子显微镜显示A组钛瓷分离界面瓷残留较多。结论纳米硅涂层可明显提高钛瓷结合强度。

Objective This study investigated the effect of silicon coating （SiO2） by solution-gelatin （Sol-Gel） technology on bonding strength of titanium and ceramics. Methods Sixteen pure titanium specimens with the size of 25 mm×3 mm×0.5 mm were divided into two groups（n=8）, test group was silicon coated by Sol-Gel technology, the other one was control group. The middle area of the samples were veneered with Vita Titankeramik system, the phase composition of two specimens were characterized by X-ray diffraction （XRD）. The bonding strength of titanium/porcelain was evaluated using three-point bending test. The interface of titanium and porcelain and fractured titanium surface were investigated by scanning electron microscope （SEM） with energy depressive spectrum （EDS）. Results Contents of surface silicon increased after modification with silicon coated by Sol-Gel technology. The mean bonding strength of test group and control group were （37.768±0.777） MPa and （29.483±1.007） MPa. There was a statistically significant difference （P=0.000） between them. The bonded ceramic boundary of test group was wider than control group. Conclusion Silicon coating by Sol-Gel technology was significant in improving bonding strength of titanium/Vita Titankeramik system.