Color Stability, Surface Roughness and Flexural Strength of an Acrylic Resin Submitted to Simulated Overnight Immersion in Denture Cleansers

摘要: This study evaluated color stability, surface roughness and flexural strength of acrylic resin specimens after immersion in alkaline peroxide hypochlorite, simulating a period one half year use overnight immersion. Sixty disc-shaped (16x4 mm) 80 rectangular (65x10x3.3 were prepared from heat-polymerized (Lucitone 550) distributed into 4 groups (n=20): C1: without immersion, C2: 8 h distilled water; AP: effervescent tablet; SH: 0.5% NaOCl solution. Properties at baseline the Color data also calculated according National Bureau Standards (NBS). Results analyzed statistically by ANOVA Tukey's HSD test (α=0.05). AP (2.34 ± 0.41) caused alteration significantly higher than C2 (0.39 0.30) SH (1.73 0.52). The mean ΔE values classified as indicial for (0.36 0.29) noticeable (2.12 0.39) (1.59 0.48). (0.0195 0.0150) ΔRa (p=0.000) (0.0005 0.0115) PA 0.0157) groups. There was no significant difference (p=0.063) among solutions (C1: 105.43 14.93, 100.30 12.43, PA: 97.61 11.09, 95.23 10.18). In conclusion, denture cleansing did not alter but alterations, peroxide. solution increase roughness.