Abstract
Objective: This in vitro study compared the shade changes in extracted teeth during 2 weeks' whitening with 5%, 10%, or 16% carbamide peroxide. Method and materials: After color calibration, the sole examiner selected 110 extracted unrestored, noncarious teeth, shade A3 or darker on a value-oriented guide. The teeth were randomly distributed into equal color groups. The control group (11 teeth) was treated with 0.9% saline, while the experimental groups (33 teeth each) were treated with 5%, 10%, or 16% carbamide peroxide. The solutions remained on the teeth for 8 hours. The teeth and tray were rinsed with tap water for 2 minutes; then rehydrated in 0.9% saline for 16 hours in the humidifier. The shade was assessed, and the process was repeated daily for 2 weeks. Results: Repeated-measures analysis of variance indicated a significant difference in overall shade values between the control and all carbamide peroxide-treated groups at days 8 and 15. A Kaplan-Meier Survival Analysis indicated a quicker two-tab color change for the 10% and 16% groups than the 5% group. However, continuation of the 5% treatment to 3 weeks resulted in shades that approached the 2-week 10% and 16% values. Conclusion: Lower concentrations of carbamide peroxide take longer to whiten teeth but eventually achieve the same result as higher concentrations. Higher concentrations may cause increased sensitivity.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 503-507 |
| Number of pages | 5 |
| Journal | Quintessence International |
| Volume | 29 |
| Issue number | 8 |
| State | Published - Aug 1 1998 |
| Externally published | Yes |
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Keywords
- Carbamide peroxide
- Color change
- Nightguard vital bleaching
- Shade guide
ASJC Scopus subject areas
- Dentistry(all)
Cite this
Use of different concentrations of carbamide peroxide for bleaching teeth : An in vitro study. / Leonard, Ralph H.; Sharma, Anita; Haywood, Van Benjamine.
In: Quintessence International, Vol. 29, No. 8, 01.08.1998, p. 503-507.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Use of different concentrations of carbamide peroxide for bleaching teeth
T2 - An in vitro study
AU - Leonard, Ralph H.
AU - Sharma, Anita
AU - Haywood, Van Benjamine
PY - 1998/8/1
Y1 - 1998/8/1
N2 - Objective: This in vitro study compared the shade changes in extracted teeth during 2 weeks' whitening with 5%, 10%, or 16% carbamide peroxide. Method and materials: After color calibration, the sole examiner selected 110 extracted unrestored, noncarious teeth, shade A3 or darker on a value-oriented guide. The teeth were randomly distributed into equal color groups. The control group (11 teeth) was treated with 0.9% saline, while the experimental groups (33 teeth each) were treated with 5%, 10%, or 16% carbamide peroxide. The solutions remained on the teeth for 8 hours. The teeth and tray were rinsed with tap water for 2 minutes; then rehydrated in 0.9% saline for 16 hours in the humidifier. The shade was assessed, and the process was repeated daily for 2 weeks. Results: Repeated-measures analysis of variance indicated a significant difference in overall shade values between the control and all carbamide peroxide-treated groups at days 8 and 15. A Kaplan-Meier Survival Analysis indicated a quicker two-tab color change for the 10% and 16% groups than the 5% group. However, continuation of the 5% treatment to 3 weeks resulted in shades that approached the 2-week 10% and 16% values. Conclusion: Lower concentrations of carbamide peroxide take longer to whiten teeth but eventually achieve the same result as higher concentrations. Higher concentrations may cause increased sensitivity.
AB - Objective: This in vitro study compared the shade changes in extracted teeth during 2 weeks' whitening with 5%, 10%, or 16% carbamide peroxide. Method and materials: After color calibration, the sole examiner selected 110 extracted unrestored, noncarious teeth, shade A3 or darker on a value-oriented guide. The teeth were randomly distributed into equal color groups. The control group (11 teeth) was treated with 0.9% saline, while the experimental groups (33 teeth each) were treated with 5%, 10%, or 16% carbamide peroxide. The solutions remained on the teeth for 8 hours. The teeth and tray were rinsed with tap water for 2 minutes; then rehydrated in 0.9% saline for 16 hours in the humidifier. The shade was assessed, and the process was repeated daily for 2 weeks. Results: Repeated-measures analysis of variance indicated a significant difference in overall shade values between the control and all carbamide peroxide-treated groups at days 8 and 15. A Kaplan-Meier Survival Analysis indicated a quicker two-tab color change for the 10% and 16% groups than the 5% group. However, continuation of the 5% treatment to 3 weeks resulted in shades that approached the 2-week 10% and 16% values. Conclusion: Lower concentrations of carbamide peroxide take longer to whiten teeth but eventually achieve the same result as higher concentrations. Higher concentrations may cause increased sensitivity.
KW - Carbamide peroxide
KW - Color change
KW - Nightguard vital bleaching
KW - Shade guide
UR - http://www.scopus.com/inward/record.url?scp=0032135479&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032135479&partnerID=8YFLogxK
M3 - Article
C2 - 9807130
AN - SCOPUS:0032135479
VL - 29
SP - 503
EP - 507
JO - Quintessence international (Berlin, Germany : 1985)
JF - Quintessence international (Berlin, Germany : 1985)
SN - 0033-6572
IS - 8
ER -