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An in vitro comparison of the bleaching efficacy of 35% carbamide peroxide with established intracoronal bleaching agents.
Int Endod J. 2004 Jul; 37(7):483-8.IE

Abstract

AIM

To evaluate the bleaching efficacy of 35% carbamide peroxide, 35% hydrogen peroxide and sodium perborate for intracoronal bleaching of root filled discoloured teeth.

METHODOLOGY

Extracted premolars were artificially stained using whole blood then root canal treatment was performed. After obturation, a 2 mm intermediate base was placed 1 mm below the buccal amelo-cemental junction. Intracoronal bleaching was performed in 11 teeth per group, using either 35% carbamide peroxide gel (group CP), 35% hydrogen peroxide gel (group HP) or sodium perborate mixed with distilled water (group SP). The bleaching agents were replaced after 7 days. The shade of the teeth was evaluated at day 0, 7 and 14. The results were analysed using Kruskal-Wallis one-way analysis of variance and Mann-Whitney U-test.

RESULTS

At the end of 7 days, both groups CP and HP lightened by 8 +/- 3 Vita tab positions, respectively, whereas group SP lightened by 5 +/- 3 tab positions (P < 0.05). At the end of the second bleaching period at day 14, group CP and HP lightened by a further 2 +/- 2 and 2 +/- 3 tab positions, respectively, whereas group SP lightened by a further 3 +/- 4 tab positions. There were no statistical differences between groups at day 14.

CONCLUSIONS

Thirty-five per cent carbamide peroxide and 35% hydrogen peroxide were equally effective for intracoronal bleaching, and significantly better than sodium perborate after 7 days. After 14 days, there were no significant differences between the groups. Thirty-five per cent carbamide peroxide can be recommended as an equally effective alternative to hydrogen peroxide for intracoronal bleaching.

Authors+Show Affiliations

Faculty of Dentistry, National University of Singapore, Singapore.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15189438

Citation

Lim, M Y., et al. "An in Vitro Comparison of the Bleaching Efficacy of 35% Carbamide Peroxide With Established Intracoronal Bleaching Agents." International Endodontic Journal, vol. 37, no. 7, 2004, pp. 483-8.
Lim MY, Lum SO, Poh RS, et al. An in vitro comparison of the bleaching efficacy of 35% carbamide peroxide with established intracoronal bleaching agents. Int Endod J. 2004;37(7):483-8.
Lim, M. Y., Lum, S. O., Poh, R. S., Lee, G. P., & Lim, K. C. (2004). An in vitro comparison of the bleaching efficacy of 35% carbamide peroxide with established intracoronal bleaching agents. International Endodontic Journal, 37(7), 483-8.
Lim MY, et al. An in Vitro Comparison of the Bleaching Efficacy of 35% Carbamide Peroxide With Established Intracoronal Bleaching Agents. Int Endod J. 2004;37(7):483-8. PubMed PMID: 15189438.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An in vitro comparison of the bleaching efficacy of 35% carbamide peroxide with established intracoronal bleaching agents. AU - Lim,M Y, AU - Lum,S O Y, AU - Poh,R S C, AU - Lee,G P, AU - Lim,K-C, PY - 2004/6/11/pubmed PY - 2004/7/13/medline PY - 2004/6/11/entrez SP - 483 EP - 8 JF - International endodontic journal JO - Int Endod J VL - 37 IS - 7 N2 - AIM: To evaluate the bleaching efficacy of 35% carbamide peroxide, 35% hydrogen peroxide and sodium perborate for intracoronal bleaching of root filled discoloured teeth. METHODOLOGY: Extracted premolars were artificially stained using whole blood then root canal treatment was performed. After obturation, a 2 mm intermediate base was placed 1 mm below the buccal amelo-cemental junction. Intracoronal bleaching was performed in 11 teeth per group, using either 35% carbamide peroxide gel (group CP), 35% hydrogen peroxide gel (group HP) or sodium perborate mixed with distilled water (group SP). The bleaching agents were replaced after 7 days. The shade of the teeth was evaluated at day 0, 7 and 14. The results were analysed using Kruskal-Wallis one-way analysis of variance and Mann-Whitney U-test. RESULTS: At the end of 7 days, both groups CP and HP lightened by 8 +/- 3 Vita tab positions, respectively, whereas group SP lightened by 5 +/- 3 tab positions (P < 0.05). At the end of the second bleaching period at day 14, group CP and HP lightened by a further 2 +/- 2 and 2 +/- 3 tab positions, respectively, whereas group SP lightened by a further 3 +/- 4 tab positions. There were no statistical differences between groups at day 14. CONCLUSIONS: Thirty-five per cent carbamide peroxide and 35% hydrogen peroxide were equally effective for intracoronal bleaching, and significantly better than sodium perborate after 7 days. After 14 days, there were no significant differences between the groups. Thirty-five per cent carbamide peroxide can be recommended as an equally effective alternative to hydrogen peroxide for intracoronal bleaching. SN - 0143-2885 UR - https://www.unboundmedicine.com/medline/citation/15189438/An_in_vitro_comparison_of_the_bleaching_efficacy_of_35_carbamide_peroxide_with_established_intracoronal_bleaching_agents_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&amp;sid=nlm:pubmed&amp;issn=0143-2885&amp;date=2004&amp;volume=37&amp;issue=7&amp;spage=483 DB - PRIME DP - Unbound Medicine ER -