Abstract
Objective: Review the effect of cigarette smoke, associated or not with brushing, on the surface roughness and microhardness of a lithium disilicate glass ceramic “Computer-Aided Design/Computer-Aided Manufacturing” (CAD/CAM). Methods: Searched for the descriptors registered in MeSH “lithium disilicate”, “smoking”, “CAD CAM”, “brushing”, “rough”, “hardness”, combined among themselves by the Boolean operator “AND”, in the database PubMed in the last 5 years. Results: According to the research, 625 articles were found and 12 in vitro studies were selected. 5 studies concluded that CAD/CAM ceramic restorations showed color stability and surface roughness after simulated brushing and thermocycling. 4 studies found that simulated brushing and some drinks significantly increased the surface roughness of lithium disilicate ceramic. 3 studies have inferred that surface roughness and microhardness can be influenced by surface treatments. Final considerations: CAD/CAM lithium disilicate ceramics have satisfactory properties in terms of strength and aesthetics, after exposure to cigarette smoke, associated or not with brushing.