Please use this identifier to cite or link to this item: https://doi.org/10.1111/j.1365-2842.2004.01298.x
Title: Effect of traditional and alternative intracoronal bleaching agents on microhardness of human dentine
Authors: Chng, H.K. 
Yap, A.U.J. 
Wattanapayungkul, P. 
Sim, C.P.C.
Keywords: Dentine
Intracoronal bleaching
Microhardness
Issue Date: 2004
Source: Chng, H.K., Yap, A.U.J., Wattanapayungkul, P., Sim, C.P.C. (2004). Effect of traditional and alternative intracoronal bleaching agents on microhardness of human dentine. Journal of Oral Rehabilitation 31 (8) : 811-816. ScholarBank@NUS Repository. https://doi.org/10.1111/j.1365-2842.2004.01298.x
Abstract: The purpose of this study was to compare the effect of traditional and alternative bleaching agents on microhardness of human dentine when used intracoronally. Thirty-six premolars were divided into six groups and bleaching agents were sealed into the pulp chambers as follows: group 1 - distilled water (control), group 2-30% hydrogen peroxide solution, group 3 - sodium perborate mixed with distilled water, group 4 - sodium perborate mixed with 30% hydrogen peroxide solution, group 5-35% carbamide peroxide gel, group 6-35% hydrogen peroxide gel. Access cavities were sealed and the teeth were stored in distilled water at 37°C. After 7 days, each tooth was sectioned at the cemento-enamel junction level and microhardness testing was carried out on dentine. The results showed that treatment with 35% hydrogen peroxide gel, 30% hydrogen peroxide solution and 35% carbamide peroxide gel reduced the microhardness of outer dentine to a small extent while treatment with sodium perborate mixed with water and sodium perborate mixed with 30% hydrogen peroxide solution did not significantly alter the microhardness of dentine.
Source Title: Journal of Oral Rehabilitation
URI: http://scholarbank.nus.edu.sg/handle/10635/46856
ISSN: 0305182X
DOI: 10.1111/j.1365-2842.2004.01298.x
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