Staining Susceptibilities of Two Different Shaded Acrylic Denture Teeth and Effectiveness of Brushing Versus Denture Cleansers on the Stain Removal: An in Vitro Study.

Objective: The objective of the present study is to evaluate the color stability of two different shaded acrylic denture teeth and the effectiveness of different cleansing methods on stain removal. Material-Method: Baseline color readings of 50 right maxillary central incisors of both A1 and A2 shaded denture teeth were performed with a spectrophotometer. Specimens were immersed in a staining solution for 72 hours (h), and the second color readings were carried out. Stained A1 and A2 shaded denture teeth were randomly divided into five subgroups according to cleansing methods as Corega 5-min (Groups of 1C5 for A1, 2C5 for A2), Protefix 3-min (Groups of 1P3, 2P3), Corega 3-min (Groups of 1C3, 2C3), brushing (Groups of 1B, 2B), distilled water (Groups of 1control, 2control) (n=10). Third color readings were performed after the related denture cleaning procedures were applied to the stained teeth. First color change (ΔE1) values were calculated according to baseline and second color readings, while second color change (ΔE2) values were calculated according to second and third color readings. Differences among ΔE1 values of the A1 and A2 shaded groups were analyzed with the Independent Samples Test. ΔE2 values were analyzed with two-way analysis of variance (2-way ANOVA). Multiple comparisons were made using the Tukey HSD test. Results: ΔE1 values were higher for A2 shaded teeth, while ΔE2 values were higher for A1 shaded denture teeth (p<0.05) for all groups. The investigated denture cleansing methods caused higher ΔE2 values than the control groups for both A1 and A2 shaded brands (p<0.05). For the A1 shaded brand, the highest ΔE2 value was observed for Group 1C3 (p<0.05). For the A2 shaded brand, ΔE2 values were similar among the test groups (p>0.05). Conclusions: The shade of denture teeth and denture cleansing method had a significant effect on ΔE values. [ABSTRACT FROM AUTHOR]