〔Abstract〕 To evaluate the effects of different surface treatment methods and simulated aging on the roughness , microhardness , and color stability of lithium disilicate glass ceramics ( LDC) . Methods The LDC were grouped and performed 5 kinds of surface treatments : control group , polishing group , polishing + polishing paste group , glazing group , polishing + glazing group . The roughness and microhardness of the specimen were measured . Then the specimens were divided into two subgroupswhich were treated with water and staining solution . The specimens were measured color parameters before and after processing. The above data was analyzed . Results The LDC had changes in surface roughness and microhardness after different surface treatments . The polishing + polishing paste group had the lowest surface roughness , and the surface microhardness of the LDC decreased after glazing. After simulating aging , the difference of color and transparency of the polishing + polishing paste group , glazing group , and polishing + glazing group were the smallest. Conclusion Different surface treatments and simu- lated aging have a certain impact on the roughness , microhardness , and color stability of LDC . Fine polishing with polishing paste has a comparable anti staining effect to glazing on LDC .