Effects of different chemical disinfectants on physical properties of denture base acrylic resin material

Abstract

Statement of the problem: There is still a lack of data regarding the effects of exposure to different chemical disinfectants on the color stability, light translucency, and surface roughness of dentures is limited.

Objective: This study aims to investigate the impact of six different chemical disinfectants on the color change, translucency, and surface roughness properties of heat-polymerized denture base acrylic resin.

Material & Methods: Totally 70 rectangular blocks (10×10×2 mm) were polymerized from the heat-polymerized acrylic denture base resin material. The surfaces of the specimens polished with 600- and 1200-grit waterproof abrasive paper. Each specimen were immersed in six denture cleansers. The total immersion time of a specimen in selected chemical disinfectant was 36 hours. Color changes, translucency and, surface roughness were measured after immersion process. The results were statistically analyzed with 1-way ANOVA and the Tukey honestly significant difference (HSD) test (α=.05).

Results: According to the results of the 1-way ANOVA test, significant differences were observed in the ∆E00, TP00 and Ra properties among the acrylic resin groups following immersion in chemical disinfectants (P<0.05). ΔE00 value of the CG group was significantly higher than that of the NS, SH, G, and E groups (P<0.05). The TP00 values of the NS and G groups were demonstrated significant differences compared with C group (P<0.05). The Ra values of the SH, SP, G, CG and, E groups were significantly increased after immersion process, in comparison with C and NS groups (P<0.05).

Conclusions: Color stability, translucency and surface roughness of the denture base heat polymerized acrylic resin is influenced by chemical disinfectants.