Effects of different surface roughness prior to overglazing on final surface texture of glazed ceramic

VernacularTitle:表面粗糙度对烤瓷上釉效果的影响
Author: Qiaoying LAN ; Jiaxing YANG ; Yi YUAN ; Feng TAN
Publication Type:Journal Article
Keywords: Ceramic; Roughness; Glaze
From: Chinese Journal of Medical Aesthetics and Cosmetology 2011;17(3):200-203
CountryChina
Language:Chinese
Abstract: Objective To evaluate the influence of different surface roughness on final surface texture of glazed ceramic. Methods Sixty porcelain discs were fabricated and randomly divided into five groups (n=12), which were sequentially grounded with water-cooled sandpapers of decreasing abrasiveness (220# , 400# , 600# , 800# and 1200# grit), and then all the specimens were glazed. Before and after glazing, the surface roughness (Ra) μm of the same specimens were evaluated quantitatively with profilometer and qualitatively using scanning electron microscopy (SEM). Results The smoothest surfaces were obtained with 1 200# sandpapers griting prior to overglazing (Ra =0. 19 μm),and 220# sandpapers griting prior to overglazing displayed the roughest surfaces (Ra =0. 55 μm) ; each group displayed significant difference before and after glazing (P < 0. 05). The images obtained through SEM were consistent with the profilometer readings. Conclusions The results suggest that decreasing the surface roughness of dental ceramic prior to glazing is of great importance in order to obtain the smoothest surface after glazing.