IADR Abstract Archives
Effect of Various Whitening Treatments on Mandibular Incisors
Objectives: To evaluate the effect of different whitening treatments on the color parameters and shades of mandibular incisors.
Methods: Fifteen extracted human mandibular incisors were randomly assigned to one of three groups (n=5): Group 1: Crest® 3D WHITE™ Classic Vivid strips (Proctor & Gamble); Group 2: Crest 3D WHITE strips (Proctor & Gamble); and Group 3: Opalescence® Go 15% (Ultradent). Samples were placed in distilled water at 37°C for 24 hours. After 24-hour storage, baseline color coordinates (L*, a*, and b*) were obtained and recorded using an Olympus® Crystaleye Spectrophotometer. Whitening treatments were conducted according to manufacturers’ instructions. All samples were stored in 37°C artificial saliva (KH2PO4 + NaN3 + KCl + CaCl2 + MgCl2) between treatments. Final color coordinates were obtained and recorded using an Olympus Crystaleye Spectrophotometer. Pre- and post- treatment color parameters were averaged over 3 trials per sample to ensure the most accurate values. Overall incisor color difference (DE*) was calculated by subtracting post-treatment L*,a*,b* values from baseline L*,a*,b* values. Two calibrated, double-blinded observers provided clinical shade values for each sample before and after the whitening procedures. Clinical shades were assigned a value from 1-16 using the VITA color scale.
Results: Descriptive statistics were calculated for all groups’ color parameters (Table 1) and shade values (Table 2). One-way ANOVA was used to assess statistical significance. There were no significant differences observed in overall color change (ΔE*), color parameters (L*, a*, b*), or shade values (p-values > 0.05) between the groups. Color, obtained through spectrophotometry, and observer’s shades were comparable.
Conclusions: All samples observed a noticeable color difference after treatment, as shown by ΔE* values greater than 2.3. Samples in group 3 showed the greatest change in clinical shade by becoming an average of 9 shades whiter.
Methods: Fifteen extracted human mandibular incisors were randomly assigned to one of three groups (n=5): Group 1: Crest® 3D WHITE™ Classic Vivid strips (Proctor & Gamble); Group 2: Crest 3D WHITE strips (Proctor & Gamble); and Group 3: Opalescence® Go 15% (Ultradent). Samples were placed in distilled water at 37°C for 24 hours. After 24-hour storage, baseline color coordinates (L*, a*, and b*) were obtained and recorded using an Olympus® Crystaleye Spectrophotometer. Whitening treatments were conducted according to manufacturers’ instructions. All samples were stored in 37°C artificial saliva (KH2PO4 + NaN3 + KCl + CaCl2 + MgCl2) between treatments. Final color coordinates were obtained and recorded using an Olympus Crystaleye Spectrophotometer. Pre- and post- treatment color parameters were averaged over 3 trials per sample to ensure the most accurate values. Overall incisor color difference (DE*) was calculated by subtracting post-treatment L*,a*,b* values from baseline L*,a*,b* values. Two calibrated, double-blinded observers provided clinical shade values for each sample before and after the whitening procedures. Clinical shades were assigned a value from 1-16 using the VITA color scale.
Results: Descriptive statistics were calculated for all groups’ color parameters (Table 1) and shade values (Table 2). One-way ANOVA was used to assess statistical significance. There were no significant differences observed in overall color change (ΔE*), color parameters (L*, a*, b*), or shade values (p-values > 0.05) between the groups. Color, obtained through spectrophotometry, and observer’s shades were comparable.
Conclusions: All samples observed a noticeable color difference after treatment, as shown by ΔE* values greater than 2.3. Samples in group 3 showed the greatest change in clinical shade by becoming an average of 9 shades whiter.
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