Bond strength of soft denture liners following immersion of denture cleanser

This study investigated the effect of a denture cleanser on tensile bond strength of acrylic and silicone-based soft denture liners. The denture liners investigated were an acrylic-based, heat-cured (Vertex soft), an acrylic-based, auto-cured (Coe soft), a silicon-based, heat-cured (Molloplast-B) and a silicon-based, auto-cured (Mollosil plus). Soft liner specimens were 10×10×3 mm in size and processed for testing according to manufacturers' instructions between 2 polymethyl methacrylate (PMMA) blocks. Specimens were stored for 1 day, 1 week and 1, 3 and 6 months in water and Polident at 37°C. Tensile bond strength was measured using a universal testing machine (Testometric Micro 500) at a crosshead speed of 20 mm/min (n=10 specimens per experimental group). ANOVA and Tukey HSD methods were used to analyze the data (?=.05). The results indicated that the tensile bond strength of all lining materials decreased with storage duration (both water and Polident), and no difference between treatments.