Comparative Evaluation of Surface Roughness on Heat Cure Denture Base Resin by Two Different Denture Cleansers

Background: Maintaining denture hygiene is essential for preventing microbial colonization and denture stomatitis. Chemical denture cleansers are routinely used, but their long-term effect on denture base resin remains a concern. This study compared the effect of two denture cleansers Fittydent and Clinsodent on the surface roughness of heat‑cure polymethyl methacrylate (PMMA) resin.Aim: To compare and evaluate the effect of two commercially available denture cleansers—Fittydent and Clinsodent on the surface roughness of heat-cure polymethyl methacrylate (PMMA) denture base resin after a 2-month immersion period.Materials and Methods: Twenty‑two standardized PMMA discs (12 × 2 mm) were fabricated following ADA specification No. 12. Samples were randomly divided into two groups (n = 11). Group A samples were immersed in Fittydent solution daily, while Group B samples were immersed in Clinsodent solution. Immersion lasted 30 minutes daily for 2 months, with solutions freshly prepared each day. Surface roughness was evaluated at baseline and after 2 months using a calibrated Taylor Hobson Surtronic 3+ profilometer (cut‑off length 0.8 mm, 5 µm diamond stylus). Data were analyzed using SPSS V 27, with significance set at p ≤ 0.05. Results: Both cleansers significantly increased PMMA surface roughness (p < 0.001). Fittydent caused a greater increase (mean ΔRa = 0.23 µm) compared to Clinsodent (mean ΔRa = 0.13 µm). ANOVA confirmed a significant intergroup difference (p < 0.001).Conclusion: Fittydent produced greater surface degradation than Clinsodent. The milder effect of Clinsodent indicates it may be preferable for long‑term denture use.