In Vitro Evaluation of Tooth-color Change Using Four Paint-on Tooth Whiteners

2007 ◽  
Vol 32 (4) ◽  
pp. 394-398 ◽  
Author(s):  
M. Kishta-Derani ◽  
G. Neiva ◽  
P. Yaman ◽  
D. Dennison

Clinical Relevance The results of this study indicate that Crest Night Effects and Colgate Simply White Night achieve a statistically significant mean number of visual shade changes and mean ΔE*ab Colorimeter readings.

2020 ◽  
Vol 32 (6) ◽  
pp. 593-600
Author(s):  
Siegfried Bratner ◽  
Wolfgang Hannak ◽  
Klaus Boening ◽  
Thomas Klinke

2016 ◽  
Vol 10 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Horieh Moosavi ◽  
Fatemeh Darvishzadeh

Objectives: This study investigated the effects of post bleaching treatments to prevent restaining and the change of enamel surface microhardness after dental bleaching in vitro. Methods: Sixty intact human incisor teeth were stained in tea solution and randomly assigned into four groups (n=15). Then samples were bleached for two weeks (8 hours daily) by 15% carbamide peroxide. Tooth color was determined both with a spectrophotometer and visually before bleaching (T1) and immediately after bleaching (T2). Next, it was applied in group 1 fluoride (Naf 2%) gel for 2 minutes, and in group 2 a fractional CO2 laser (10 mJ, 200 Hz, 10 s), and in group 3, nanohydroxyapatite gel for 2 minutes. The bleached teeth in group 4 remained untreated (control group). Then teeth placed in tea solution again. Color examinations were repeated after various post bleaching treatments (T3) and restaining with tea (T4) and color change values recorded. The microhardness was measured at the enamel surface of samples. Data was analyzed using ANOVA, Tukey HSD test and Dunnett T3 (α = 0.05). Results: Directly after bleaching (ΔE T3-T2), the treatment with nanohydroxyapatite showed significantly the least color lapse in colorimetric evaluation. In experimental groups, the color change between T3 and T4 stages (ΔE T4-T3) was significantly lower than control group (P < 0.05). Different methods of enamel treatment caused a significant increase in surface microhardness compared to control group (P < 0.05). Significance: Application of fluoride, fractional CO2 laser and nanohydroxyapatite as post bleaching treatments are suggested for prevention of stain absorption and increasing the hardening of bleached enamel.


10.2341/05-16 ◽  
2006 ◽  
Vol 31 (2) ◽  
pp. 227-232 ◽  
Author(s):  
S. Deliperi ◽  
D. N. Bardwell ◽  
C. Wegley ◽  
M. D. Congiu

Clinical Relevance Microleakage of a total-etch adhesive system was not influenced by the application of hydrogen peroxide; conversely, enamel dye penetration significantly increased for a self-etching primer.


Author(s):  
Larissa Menezes Costa ◽  
Felipe de Souza Matos ◽  
Ayla Macyelle de Oliveira Correia ◽  
Nayane Chagas Carvalho ◽  
André Luís Faria-e-Silva ◽  
...  

Author(s):  
Nalem Rika Rahayu

ABSTRACT   Changing tooth color affects a person's aesthetics. Methods to restore tooth discoloration include the use ofagents bleaching. This study aims to understand the differences in the effectiveness of strawberry and honey orange extracts intooth discoloration in vitro. This type of experimental laboratory research used 45 premolar tooth samples divided into 3 groups (50% strawberry extract and 10% carbamide peroxide concentration, 50% honey orange extract and 10% carbamide peroxide concentration and 10% carbamide peroxide concentration). Samples were immersed in coffee solution for 5 days and recorded color with a shade guide, then samples were immersed in the extract of strawberries, honey oranges and carbamide peroxide for 7 days in an incubator, then recorded color again visually with a shade guide. Data analysis used thestatistical tests Oneway Anova and Posthoc LSD. The color change of the sample group immersed in strawberry extract with carbamide peroxide resulted in a significant difference (p <0.05). Likewise, the sample group immersed in honey orange extract with carbamide peroxide produced a significant difference (p <0.05), but strawberries and honey oranges did not. there is not significant difference (p> 0.05). From the results of the study it can be concluded that the extracts of strawberries and honey oranges were able to increase the discoloration of teeth to become brighter, there was no significant difference between changes in tooth discoloration soaked in strawberry extract and honey orange.   ABSTRAK Warna gigi yang berubah mempengaruhi estetik seseorang, metode untuk mengembalikan perubahan warna gigi diantaranya dengan penggunakan bahan bleaching. Penelitian ini bertujuan untuk memahami perbedaan efektivitas ekstrak buah stroberi dan jeruk madu dalam perubahan warna gigi secara in vitro. Jenis penelitian eksperimental laboratoris menggunakan sampel gigi premolar sebanyak 45 buah dibagi atas 3 kelompok (ekstrak stroberi konsentrasi 50% dan karbamid peroksida konsentrasi 10%, ekstrak jeruk madu konsentrasi 50% dan karbamid peroksida konsentrasi 10% dan karbamid peroksida konsentrasi 10%). Sampel direndam larutan kopi selama 5 hari dan lakukan pencatatan warna dengan shade guide, kemudian sampel direndam ekstrak stroberi, jeruk madu dan karbamid peroksida selama 7 hari di dalam inkubator, lalu dilakukan pencatatan warna kembali secara visual dengan shade guide. Analisis data memakai uji statistik Oneway Anova dan Posthoc LSD. Perubahan warna kelompok sampel direndam ekstrak stroberi dengan karbamid peroksida menghasilkan perbedaan signifikan (p<0,05), begitu pula kelompok sampel yang direndam ekstrak jeruk madu dengan karbamid peroksida menghasilkan perbedaan signifikan (p<0,05), namun stroberi dan jeruk madu tidak ada perbedaan yang signifikan (p>0,05). Dari hasil penelitian dapat disimpulkan bahwa ekstrak  stroberi dan jeruk madu mampu meningkatkan perubahan warna gigi menjadi lebih terang, tidak ada perbedaan signifikan antara perubahan perubahan warna gigi yang direndam ekstrak stroberi dan jeruk madu.


2012 ◽  
Vol 37 (1) ◽  
pp. 87-92 ◽  
Author(s):  
EJ Navimipour ◽  
S Kimyai ◽  
S Nikazar ◽  
M Ghojazadeh

Clinical Relevance Delaying oral hygiene procedures during bleaching does not seem to cause any change in enamel microhardness.


2018 ◽  
Vol 43 (3) ◽  
pp. 326-334 ◽  
Author(s):  
SR Kwon ◽  
FNU Pallavi ◽  
Y Shi ◽  
U Oyoyo ◽  
A Mohraz ◽  
...  

SUMMARY Objectives: Whitening efficacy has been related to hydrogen peroxide (HP) diffusion into tooth structure. However, little information is available relating rheological properties to whitening efficacy. The purpose was to evaluate the whitening efficacy and HP penetration level of a 10% HP gel at three different viscosities and to compare them to a strip delivery system. Methods and Materials: Extracted molars (n=120) were randomly assigned into five groups (n=24/ group): NC_MED (negative control; median): medium viscosity gel without HP; LOW: 10% HP gel (low viscosity experimental gel, Ultradent Products Inc); MED: 10% HP gel (medium viscosity experimental gel, Ultradent); HIGH: 10% HP gel (high viscosity gel, Ultradent); and CWS: Crest 3D Whitestrips 1-Hour Express (Procter & Gamble). All teeth were subjected to five 60-minute whitening sessions. Instrumental color measurements were performed at baseline (T0), and 1-day after each application (T1-T5), and 1-month after whitening (T6). HP penetration was estimated with leucocrystal violet and horseradish peroxidase. A Kruskal-Wallis test and post hoc Bonferroni test were performed to assess the difference in tooth color change and HP penetration among the groups (α=0.05). Results: Hydrogen peroxide penetration levels and overall color changes at T6 were 0.24 μg/mL / 2.80; 0.48 μg/mL / 8.48; 0.44 μg/mL / 7.72; 0.35 μg/mL / 8.49; 0.36 μg/mL / 7.30 for groups NC, LOW, MED, HIGH, and CWS, respectively. There was a significant difference for HP penetration, while there was no significant difference among the four experimental groups for tooth color change. Conclusion: Rheological properties should be considered when developing new whitening formulations.


2011 ◽  
Vol 36 (4) ◽  
pp. 397-402 ◽  
Author(s):  
ALF Briso ◽  
LP Caruzo ◽  
APA Guedes ◽  
A Catelan ◽  
PH dos Santos

Clinical Relevance The effects of dental erosion caused by acidic solutions on the surface of restorative dental materials could be minimized by the application of a surface sealant.


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