| Autor: |
Chng, H. K., Yap, A. U. J., Wattanapayungkul, P., Sim, C. P. C. |
| Předmět: |
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| Zdroj: |
Journal of Oral Rehabilitation; Aug2004, Vol. 31 Issue 8, p811-816, 6p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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