钛表面不同喷砂条件处理对钛/瓷结合强度的影响

The study of Al_2O_3 on the bond strength of porcelain/titanium

目的探讨钛表面采用不同喷砂条件进行处理对钛/瓷结合强度的影响,为临床操作提供依据。方法采用50μm和250μm的Al2O3分别在0.2MPa、0.4MPa的压力下对钛表面进行喷砂粗化处理后,通过电镜观察Al2O3颗粒在钛表面残留量,并对钛表面粗糙度、钛表面接触角以及钛瓷间的结合强度进行检测,确定喷砂条件对钛/瓷结合强度的影响。结果50μm、0.4MPa组的钛试件表面的Al2O3颗粒残留较多。喷砂压力相同时,250μmAl2O3喷砂处理的钛表面粗糙度较大(P<0.05);喷砂粒度相同时,0.4MPa喷砂压力下的钛表面粗糙度较大(P<0.05)。喷砂压力相同时,250μmAl2O3喷砂处理的钛表面接触角较大(P<0.05);喷砂粒度相同时,钛表面接触角无统计学差异(P>0.05)。统计分析显示250μm、0.4MPa组的钛/瓷结合强度最大(P<0.05);50μm、0.4MPa组的钛/瓷结合强度最小(P<0.05);50μm、0.2MPa组和250μm、0.2MPa组的钛/瓷结合强度无显著差异(P>0.05)。结论在0.2MPa压力下进行喷砂处理时,采用50μm和250μm的Al2O3颗粒对钛基体进行喷砂处理均可。在0.4MPa的压力下对钛表面进行喷砂处理时应采用较大粒度的Al2O3颗粒。

Objective To study the effect of the size of Al2O3 and the pressure of air abrasion on the bond strength of porcelain/titanium.Methods The titanium surface were observed by SEM, then the roughness （Ra） ,contact angle of titanium surface and the bonding strength of titanium/porcelain were evaluated after using the different size of Al2O3（50μm,250μm）in different air pressure（0.2MPa, 0.4MPa）to rough the titanium surface.Results Many Al2O3 particles could be observed in the surface of titanium of 50μm、0.4MPa group. The value of the roughness （Ra） and the contact angle became higher when the larger size of Al2O3 was used to rough the titanium surface （P〈0.05）;the value of the roughness （Ra） became higher （P〈0.05） while the contact angle had no change （P〉0.05） when the larger air pressure was used. Bond strength of porcelain/titanium of 50μm、0.4MPa group was lowest（P〈0.05）, while the bond strength of porcelain/titanium of 250μm、0.4MPa group was highest （P〈0.05）. The size of Al2O3 had no obvious effect on the bond strength of titanium-porcelain when 0.2MPa air pressure was used （P〉0.05）.Conclusion Fifty micron and 250μm Al2O3 can be used to rough the titanium surface when 0.2MPa air pressure was used. It is suggested that the Al2O3 of larger size should be used with 0.4MPa air pressure.