液相沉积过程中反应液pH值对钛瓷结合强度的影响

Effect of liquid-phase deposition with different pH value on bonding strength of porcelain and pure titanium

目的:研究以不同pH值反应液行纯钛表面液相沉积处理后对钛瓷结合强度的影响。方法:36个纯钛试件随机分为3个实验组和1个对照组(n=9),经喷砂处理后3个实验组分别置于pH值为8、9、10的反应液中进行液相沉积处理。然后分别用扫描电镜观测试件的表面形貌;接触角测量仪测量钛-蒸馏水表面接触角;最后参照IS09693(1999)Amd.1 2005(E)标准在各组试件的中部烧结瓷层用万能试验机测各组试件的钛瓷结合强度;扫描电镜观察钛瓷结合界面形貌。结果:各实验组钛瓷结合强度均明显高于对照组(P<0.05);pH 9组钛瓷结合强度分别高于pH 8组和pH 10组(P<0.05)。结论:用液相沉积法在纯钛表面制备中间层可明显提高钛瓷结合强度,当反应液pH值为9时钛瓷结合强度最高。

AIM： To investigate the effect of liquid-phase deposition（LPD） with different pH value on the bonding strength in the middle layer of titanium and porcelain . METHODS： 36 pure titanium specimens were sandblasted and treated by LPD at pH 8, pH 9, pH 10 and without LPD treatment （the controls） respectively（n = 9）. The interface of titanium and porcelain was observed by scanning electron microscope （SEM）. The contact angle of titanium surface with H20 was measured. A three-point-flexure-test was used to measure the bonding strength of titanium to porcelain. RESULTS： Better continuity and thickness uniformity of the interface of titanium and porcelain were observed in LPD at pH 9 treated samples. The contact angle values were in the order of pH 8 group 〉 control group 〉 pH 10 group 〉 pH 9 group. The bonding strength of the LPD treated samples was significantly higher than that of the controls （P 〈 0.05 ）, that of LPD at pH 9 treated samples was the highest（ P 〈 0.05 ）. CONCLUSION： LPD at pH 8 10 may improve the bonding strength of porcelain and pure titanium in the middle layer . LPD at pH 9 may show highest effect.