不同表面处理对氧化锆陶瓷表面形貌的影响

Effect of surface treatments on the surface morphology of zirconia ceramic

目的探讨不同表面处理后氧化锆陶瓷表面形貌的变化。方法烧结48个6mm×6mm×2mm的氧化锆陶瓷方形试件，按随机数字表法分为空白对照组（n=12）、喷砂组（n=12）、e－max渗透剂组（n=12）、In—eeram渗透剂组（n=12）。空白对照组不做任何表面处理；喷砂组采用120txmA1203颗粒喷砂处理；e-max渗透剂组和In-ceram渗透剂组分别采用e—max上釉膏和In-ceram氧化铝渗透玻璃粉作为渗透剂进行选择性渗透蚀刻。测量表面处理后各组试件的表面粗糙度，扫描电镜下观察试件表面形貌，能谱分析仪检测试件表面元素含量变化。结果空白对照组、喷砂组、e-max渗透剂组和In-eeram渗透剂组的表面粗糙度Ra值分别为（0．0780±0．0160）μm、（0．1005±0．0031）μm、（0．4107±0．0370）μm、（0．2623±0．0143）μm。e-max渗透剂组和In-ceram渗透剂组的表面粗糙度大于空白对照组和喷砂组（均P〈0．01）；喷砂组与空白对照组的表面粗糙度的差异无统计学意义（P〉0．05）；e-max渗透剂组表面粗糙度大于In．eeram渗透剂组（P〈0．01），e—max渗透剂组表面粗糙度Ra值最大。扫描电镜和能谱分析显示表面处理后氧化锆陶瓷试件表面形貌发生改变，而表面元素含量无变化。结论选择性渗透蚀刻能使氧化锆陶瓷表面更粗糙，形成网状间隙结构，有利于树脂黏接剂的渗入。

Objective To investigate the surface morphological changes of zirconia ceramic after different surface treatments. Methods Forty-eight square specimens of sintered zirconia ceramic, 6 mmX6 minx2 mm in volume, were allocated to 4 groups （n= 12 each） by random digits table which were respectively subjected to no surface treatment （group A）, airborne-particle abrasion with 120 ~m A1203 particles （group B）, selective infiltration etching （SIE） with IPS e-max ceram glaze paste as infiltration agent （group C ） and SIE with In-ceram alumina glass powder as infiltration agent （group D）. The surface roughness of specimens in all groups was measured after surface treatments. The surface features of specimens were observed by scanning electron microscopy （SEM）, and the changes of surface element contents were detected by energy dispersive spectrometer （EDS）. Results The Ra values of surface roughness for groups A, B, C and D were （0.078 0±0.016 0） μm, （0.100 5±0.003 1） μm, （0.410 7±0.037 0） μm and（0.262 3±0.014 3） μm respectively. The surface roughness in groups C and D was significantly higher compared to groups A and B （all P〈0.01） , and there was no significant difference between groups A and B （P〉0.05）. The surface roughness in group C was significantly higher than that in group D （P〈0.01）, having the highest Ra value of all groups. SEM and EDS revealed the changes in surface morphology but none in contents of surface elements of zirconia ceramics after surface treatments. Conclusion SIE can increase the surface roughness of zirconia ceramics, and shape the reticular gap on surface, which may profit to the infiltration of resinadhesives.