OBJECTIVE: The purpose of this study was to investigate how cigarette smoking affects the surface roughness (R MATERIALS AND METHODS: Two additively manufactured definitive resins (Dentafab, DF and Formlabs, FL) and a subtractively manufactured resin nanoceramic (Cerasmart, CS) were used to fabricate 60 specimens (14 × 12 × 1 mm). After taking baseline R RESULT: Significantly less discoloration was observed in the FL group compared with the other groups (p <
0.001). The R CONCLUSION: All the tested materials had moderately unacceptable color change when previously reported threshold values were considered. There was not found to be any linear correlation between the R CLINICAL SIGNIFICANCE: The discoloration and surface roughness of three-dimensional (3D)-produced SLA definitive resin because of smoking are at acceptable levels. Optimized physical and chemical properties of definitive resins are clinically important to extend the life of the restoration. The application of 3D definitive resin can be recommended in clinical practice.