CAD/CAM technologies are one of the rapidly developing fields in digital restorative dentistry. The objective of this in vitro study was to evaluate the influence of glazing and thermocycling on the surface roughness values of four different types of milled CAD/CAM ceramic materials. Aim - to evaluate the effects of glazing and thermocycling on the surface roughness values of four different types of CAD/CAM ceramic veneers. This study hypothesized that there would be a statistically significant difference in surface roughness values between glazed and nonglazed CAD/CAM materials across the four tested ceramics. Materials and Methods - As part of the investigation,80 CAD/CAM ceramic veneer samples were milled using CAD/CAM system (inLab MC XL CEREC, Dentsply Sirona, Germany). The processing occurred after scanning of the first right typodont incisor of the upper jaw model prepared with the palatal chamfer preparation design without approximal involvement (KaVo, Germany) via an Omnicam scanner (CEREC, Dentsply Sirona, Germany). Four different CAD/CAM ceramic materials were evaluated in this study: lithium disilicate (IPS E.max CAD, Ivoclar, Germany), leucite-reinforced ceramic (IPS
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