Background: The heat cured polymethylmethacrylate polymers have been the most popular choice as conventional denture base materials. The present study was conducted to assess the influence of cigarette smoking effects on the surface roughness of two different denture base materials. Materials & Methods: The present study was conducted on 60 specimens were fabricated from two commercially available denture base materials: heat-cured polymethylmethacrylate and flexible denture base materials. The surface roughness was measured before and after smoking using a profilometer. Results: Subgroup I comprised of heat-cured denture base material specimens (control group), subgroup II had flexible denture base material (control group), subgroup III had heat-cured denture base material and subgroup IV had flexible denture base material. The mean IR (μm) in subgroup I was 0.17, in subgroup II was 0.26, in subgroup III was 0.23 and in subgroup IV was 0.28. The mean FR (μm) in subgroup I was 0.54, in subgroup II was 0.72, in subgroup III was 1.4 and in subgroup IV was 1.8. The difference was significant (P< 0.05). Conclusion: Authors found that the surface roughness of the specimens fabricated from the flexible denture base material was found to be more compared to heat-cured denture base specimens after exposure to cigarette smoke.
Key words: Flexible denture base, Heat-cured denture, Smoking.