413 - Color Stability in Pediatric Prefabricated Crowns with Relevant Staining

Purpose: Since pediatric zirconia crowns (ZRCs) are considered an esthetic treatment option for decayed primary incisors, color stability and performance when exposed to common childhood beverages should be evaluated. Possible changes in color stability and translucency were evaluated for 3 brands of prefabricated zirconia crowns following submergence in 4 beverage solutions.

Methods: Twenty-four maxillary right central incisor prefabricated ZRCs were obtained from NuSmile, Sprig, and Kinder Krowns manufacturers and randomly divided into 4 groups. Crowns were submerged in Apple Juice, Tum-E Yummies, Gatorade, and Kool-Aid for a total of 21 days. Facial surfaces of each crown were evaluated with a spectrophotometer at days 3,5,7,14, and 21 to determine color and translucency using reflectance visible light. Changes in color and translucency differences were calculated by subtracting the initial from final value respective to specimen conditions. Data were statistically analyzed using 2-way repeated measures ANOVA, HS (P <.05).

Results: In color, NuSmile with Kool-Aid demonstrated a significant difference between all Sprig combinations and Kinder Gatorade at day 3 (P=.046). Sprig color for Kool-Aid demonstrated a significant difference for day 14 and 21 versus day 3, 5, and 7 (P=.010).
In translucency, NuSmile with Kool-Aid demonstrated a significant difference between Sprig Kool-Aid and Apple Juice at day 3 and 14 (P=.035).

Conclusions: All crowns experienced change in color and translucency less than the acceptability thresholds ΔE00=1.8 and TAT00=2.6. However, certain combinations were above the perceptibility thresholds ΔE00=0.8 and TPT00=0.6. Therefore, perceived differences after exposure to common childhood beverages may be observed in prefabricated ZRCs.