Effect of coffe and a cola-based soft drink on the color stability of bleached bovine incisors considering the time elapsed after bleaching
J. appl. oral sci
;
22(6): 534-540, Nov-Dec/2014. tab, graf
Article
in English
| LILACS, BBO
| ID: lil-732591
ABSTRACT
There is no consensus about the waiting time necessary for the patient to start consuming beverages containing colorants again after bleaching. Objective:
To evaluate the influence of beverages with coloring agents on bleached bovine incisors considering the time elapsed after bleaching. Materials andmethods:
Sixty bovine incisors were bleached with 35% hydrogen peroxide for in-office use (Whiteness HP Max) and divided into 10 groups. The color was evaluated with a spectrophotometer (Spectro Shade MICRO) before and after bleaching, employing the CIE-Lab system. After bleaching, the teeth were exposed for 5 min to coffee or cola-based soft drink (CBSD) at different periods after bleaching 10 min, 1 h, 24 h, 48 h, and 72 h. Color (∆E) and lightness (∆L) variations were obtained from the CIE-Lab coordinates. Data were subjected to two-way ANOVA and Tukey HSD tests (p<0.05).Results:
Significant differences were observed between groups for both the ∆L and ∆E values (p<0.001). All specimens presented a decrease in brightness (negative ∆L). The highest ∆E values were observed for teeth stained with a CBSD at 10 min and 1 h (4.12 and 4.16, respectively). Teeth pigmented with coffee presented ∆E values below 3.3 units for all evaluation times.Conclusion:
The exposure to coffee after bleaching causes less color changes than the exposure to a CBSD regardless of the time after bleaching. .
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tooth
/
Tooth Bleaching
/
Pigmentation
/
Carbonated Beverages
/
Coffee
/
Cola
Type of study:
Evaluation studies
Limits:
Animals
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2014
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Positivo University/BR
/
University of São Paulo/BR
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