中文摘要：

目的：比较分析三种不同表面处理方法对全瓷材料表面粗糙度及表面自由能的影响。方法：选用两种氧化锆（LAVA Plus,Wieland）和两种玻璃陶瓷（E.max Press,ELDC）,按照生产商的制作方法制作成盘状试件（直径13 mm,厚1 mm）,并将以上四组全瓷材料按照不同的表面处理方式分别分为以下三个亚组：粗磨组（rough grinding）、抛光组（polishing）和上釉组（glazing）。利用三维形貌扫描仪测量样本表面的面粗糙度（Sa）,表面张力仪测量各组样本表面接触角并计算表面自由能。结果：各组材料粗磨组粗糙度值均显著高于其抛光组及上釉组;对于两种氧化锆陶瓷,抛光组与上釉组间粗糙度值无显著差异（P〉0.05）,而对于两种玻璃陶瓷,抛光组的粗糙度值显著低于上釉组（P〈0.05）;上釉组表面自由能均显著高于相应粗磨组及抛光组（P〈0.05）,粗磨组和抛光组间无显著性差异。结论：抛光和上釉均能显著降低全瓷材料的表面粗糙度,对于氧化锆陶瓷,抛光能达到类似上釉的表面粗糙度,对于玻璃陶瓷,抛光能够获得更加光滑的表面。上釉后全瓷材料的表面自由能显著高于抛光组。

英文摘要：

Objective： To investigate the influence of different surface treatments on roughness and surface free energy of dental ceramic material. Methods： The ceramic material included two zirconia and two glass ceramics. Disc samples（13 mm in diameter and 1mm in thickness） of each material were fabricated followed the instruction of manufactures respectively. Then, all samples of each ceramic material were classified to three groups： rough grinding, polishing and glazing. Then, the surface roughness and surface free energy of each specimen were measured. Results： For all ceramic materials, the surface roughness value of the grinding group is significantly higher than that of the polishing group or glazing group. For zirconia ceramics, polishing and glazing groups achieved similar roughness value（P〉0.05）. As for glass ceramics, compared with glazing group, polishing groups showed significantly lower roughness value（P〈0.05）. Moreover, specimens after glazing treatment had the highest surface free energy（P〈0.05）. No difference was observed between grinding group and polishing group. Conclusions： Polishing and glazing treatment could significantly reduce the surface roughness of ceramic materials. For zirconia ceramic, polishing and grazing achieved similar surface roughness. For glass ceramics, polished specimens had the smoothest surface. Grazing treatment would increase the surface free energy.