Publication: In vitro penetration of the pulp chamber by three brands of carbamide peroxide
Issued Date
1999-01-01
Resource Type
ISSN
17088240
14964155
14964155
Other identifier(s)
2-s2.0-0033290835
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Esthetic and Restorative Dentistry. Vol.11, No.5 (1999), 259-264
Suggested Citation
Waraporn Thitinanthapan, Pimonmas Satamanont, Noppakun Vongsavan In vitro penetration of the pulp chamber by three brands of carbamide peroxide. Journal of Esthetic and Restorative Dentistry. Vol.11, No.5 (1999), 259-264. doi:10.1111/j.1708-8240.1999.tb00407.x Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/25397
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Title
In vitro penetration of the pulp chamber by three brands of carbamide peroxide
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Abstract
Purpose: Vital tooth bleaching has become a popular procedure for whitening teeth. Most home bleaching products contain 10% carbamide peroxide. The purpose of this in vitro study was to measure the quantity of hydrogen peroxide that reaches the pulp chamber from three carbamide peroxide products: Opalescence™, Sparkle™, and Rembrandt™. Materials and Methods: Seventy roots of extracted premolars were amputated approximately 3 mm apical to the cementoenamel junction, and the pulp tissues were removed. They were divided into three experimental groups (n = 20) and a control group of 10 teeth. An acetate buffer solution was placed in the pulp chamber before the crown was exposed to the bleaching agent at 37°C for 25 minutes. The buffer solution was removed and reacted with leukocrystal violet and horseradish peroxidase. The optical density of blue color that developed was measured at a wavelength of 596 nm and read from a standard curve for hydrogen peroxide quantity. Results: The measured amounts of hydrogen peroxide were 3.605 ± 1.405,1.282 ± 0.762, and 0.339 ± 0.251 pg for the Opalescence™, Sparkle™, and Rembrandt™ groups, respectively. A statistically significant difference in the hydrogen peroxide levels was observed by analysis of variance (p <.05) among the three groups. It was concluded that the penetration of commercial bleach ing products was different even though the products were labeled as having the same 10% carbamide peroxide. © 1999 Wiley. All rights reserved.