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
de En
| LILACS, BBO
| ID: lil-732591
Bibliothèque responsable:
BR1.1
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. .Mots clés
Texte intégral:
1
Indice:
LILACS
Sujet Principal:
Dent
/
Blanchiment dentaire
/
Pigmentation
/
Boissons gazeuses
/
Café
/
Cola
Type d'étude:
Evaluation_studies
Limites du sujet:
Animals
langue:
En
Texte intégral:
J. appl. oral sci
Thème du journal:
ODONTOLOGIA
Année:
2014
Type:
Article