钛表面不同条件液相沉积处理对钛瓷结合强度的影响

目的：研究在不同工作条件下液相沉积处理对钛瓷结合强度的影响。方法：将50个纯钛试件平均分为10组（n=5）,喷砂后分别在不同反应液pH值及硅酸钠浓度下对9组实验组试件进行表面处理,对照组不做处理,然后用扫描电镜观察试件处理后的表面形貌,参照ISO 9693（1999）Amd.1 2005（E）标准在试件中部烧结瓷粉,用三点弯曲方法测各组试件钛瓷结合强度。结果：各实验组钛瓷结合强度平均值均高于对照组,当反应液pH=9,硅酸钠溶液浓度为0.3 mol/L时,钛瓷结合强度最高,达（38.86±2.63）MPa,明显高于其他9组（P〈0.05）。结论：通过液相沉积法在纯钛表面制备二氧化硅中间层可提高钛瓷结合强度,反应液pH值和硅酸钠溶液浓度的变化都对钛瓷结合强度产生影响。

Effect of middle layer by liquid-phase deposition technology on bonding strength of porcelain and pure titanium

Objective： To investigate the effect of middle layer with liquid-phase deposition（LPD） technology on bonding strength of titanium and porcelain in different condition.Methods： Fifty pure titanium specimens were randomly divided into ten groups（n = 5） according to different surface treatments after sandblasting.The surface of titanium was investigated by scanning electron microscope（SEM）.After the middle area of the samples was veneered with porcelain,a three-point-flexure-test was used to evaluate the bonding strength of titanium to porcelain.Results： The bonding strength of groups of liquid-phase deposition were significantly higher than control group（P 0.05）.The mean bonding strength of pH = 9,0.3 mol / L silicate solution group was the highest（38.86 ± 2.63） MPa],it was significantly higher than those of other nine groups（P 0.05）.Conclusion： Middle layer prepared by LPD technology was significant in improving bonding strength of porcelain and pure titanium,the bonding strength was the highest by pH = 9,0.3 mol / L silicate solution.