Effects of chemical disinfectants on surface characteristics and color of three fixed prosthodontic crown materials

Statement of problem. Dental restorations should reproduce similar optical effects as natural tooth structure to achieve a good color match, Mismatch call result in unsatisfactory shade matching. Purpose. This study determined whether chemical disinfectants affected the surface texture and color of 3 fixed prosthodontic materials. Material and methods. Five chemical disinfcctants. (Clorox, Banicide, Cidex -7, Bioi idc, and Multicide) in combination with 3 restorative materials (D icor, Vita TIMI( ceramometal porcelain, Midas ADA type III noble casting al loy) were evaluated at 4 different times of immersion (10 minutes, 30 minut es, 24 hours, and 7 days). Changes from baseline for surface roughness and color were evaluated. Surface roughness data were recorded with a surface a nalyzer and color data ill CIE L*a*b* color space were measured with a colo rimeter. Data were analyzed with repeated measures analysis of variance and single factor analysis of variance. Results. There were no statistical differences in surface roughness among d isinfectants and restorative materials. However, there were statistical dif ferences of changes in color, increase in Delta E and decrease in Delta L, among disinfectants and the noble casting allo). Conclusion. Only 2 of the 3 materials evaluated, Dicor and Vita VMK ceramom etal porcelain, can be used with all 5 disinfectants up to 7 days of immers ion. Three chemical disinfectants (Biocide, Clorox, and Multicide) caused c linically significant color changes with the noble casting alloy after 7 da ys of immersion.