不同处理方法对钛瓷结合强度影响的研究

目的:观察微弧氧化表面处理方法在钛瓷结合方面的作用。方法:将试样分为三组,微弧氧化组,预氧化组,光滑组:对各组钛试件表面进行瓷粉烧结。根据ISO 9693标准,对钛瓷间的三点弯曲结合强度进行测试,并对钛瓷结合界面和瓷剥脱面进行SEM和EDX观察与分析。结果:处理方法不同,钛表面形貌及相结构也不同。钛试样微弧氧化组,预氧化组,光滑组与瓷的结合强度分别是:42.40±4.35Mpa,34.28±2.84Mpa和28.58±2.74Mpa,微弧氧化组的钛瓷结合强度与不进行微弧氧化处理组的钛瓷结合强度相比在统计学上有显著差异(P<0.05);预氧化组的钛瓷结合强度大于光滑组(P<0.05),但明显小于微弧氧化组(P<0.01);未进行微弧氧化处理组的钛瓷界面间可见有明显裂隙;而微弧氧化组的钛瓷界面瓷与钛基体结合紧密,无任何气泡、孔隙存在。结论:钛表面微弧氧化处理后可有效提高钛瓷的结合强度。

Effects of Different Treatments on Bond Strength of Titanium to Porcelain

Objective: To investigate the effects of microarc oxidation treatment(MAO) on Ti-porcelain strength.Methods: There were three groups: micro-arc oxidation group,pre-oxidation group,and the control group.The surface of the samples was detected by scanning electron microscope(SEM).The samples were bonded to porcelain.The bonding interfaces between Ti substrate and porcelain were detected by SEM and EDX.Bonding strength of the samples was measured by a three-point bending tester according to ISO9693.Results: There were different in the surface morphology and the phase components of three groups.The mean bond strength of the micro-arc oxidation group,pre-oxidation group,and the control group were 42.40±4.35 MPa,34.28±2.84 MPa,and 28.58±2.74 MPa,respectively.When titanium subjected to micro-arc oxidation treatment,it had significant higher bond strength than that in the pre-oxidation group and the control group(P<0.05).In the micro-arc oxidation specimen,the oxide layer was thin,and it was compact bonding with titanium and porcelain.Conclusion: Micro-arc oxidation treatment for titanium substrates might be a simple and effective method for strengthening the titanium-ceramic bonding.