Digital analysis of the color of the heat-cured acrylic resin (using scanner)


Aim: Using scanner image to digitally analyze the brightness and the effect of the type the of material, thickness and immersion of material in different solutions on the color change of the heat-cured acrylic resin denture base material. Materials and Methods: Two types of heat-cured acrylic resin denture base material were used. Totally 30 samples were prepared for uniform dimension for each color test. Sample scanner imaged and color metric is analyzed with software program Adob Photoshop 9.0. The CommissionInte´rnationale de l’E´ clairage for characterizing color ( CIE L*a*b*) color difference metrics were used for the performance analysis. Color change (ΔE) value calculated to determine clini-cally acceptable color change. Statistically ANOVA, Student's t–test , Dunnett pairwise multiple com-parison t–test and Duncan's multiple range test were carried out to determine the significant differences at p≤ 0.05 . Results: The results appeared that there is a significant differences of the brightness value before and after polishing of the acrylic resin samples. And statistically there is a significant effect of type, thickness, and immersion in different solution on the color change of the tested materials which is clinically not acceptable . Conclusion : The result appeared that scanner gives an accurate image to digitally evaluate brightness and color change of dental materials with CIE L*a*b*color system.