Influence of dental cleansers on the color stability and surface roughness of three types of denture bases

الملخص EN

Background : This study is concerned with color stability and surface roughness of three types of denture base materials when immersed into three types of denture cleansers.

Materials and method : Forty five specimens were prepared, fifteen of each type were immersed into distilled water for 48hours which regarded as control and then each five specimens were immersed into one of three different denture cleansers for twelve hours then undergone testing for color stability and surface roughness ,the results were analyzed by paired t-test and ANOVA test.

Results : In color stability the hot cure acrylic give non significant difference p>0.05 with denture cleansers, the soft base give (HS) high significant difference which is greatly affected by denture cleansers while the nylon denture was significantly affected by bleach rather than the other two cleansers was non significant.

The ANOVA test show smooth effect of fitty dent (NS)on both nylon and soft base.

The surface roughness test it was significantly affected by denture cleansers by t-test while ANOVA the smooth effect of both fitty and lacalut dent on denture bases with non significant difference.

Conclusion : Denture cleansers can cause whitening or color fainting or even bleaching.

The surface texture affected by cleansers in deferent level according to time of immersion, concentration and type of active component that lead to increase of roughness or wear of denture outer surface.

The effect of fitty dent was safer in its action and smoother than bleach and lacalut.