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Ex vivo evaluation of the effectiveness of bleaching agents on the shade alteration of blood-stained teeth.
Int Endod J. 2008 Jun; 41(6):485-92.IE

Abstract

AIM

To evaluate ex vivo effectiveness of the three formulations of bleaching materials for intracoronal bleaching of root filled teeth using the walking bleach technique.

METHODOLOGY

Extracted premolar teeth were stained artificially with human blood. After biomechanical preparation, the root canals were filled and a 3-mm thick intermediate base of zinc phosphate cement was placed at the level of the cementoenamel junction. The teeth were divided into four groups (n = 12): C (control, without bleaching material), A1 (sodium perborate + distilled water), A2 (sodium perborate + 10% carbamide peroxide) and A3 (sodium perborate + 35% carbamide peroxide). The bleaching materials were changed at 7 and 14 days. Evaluation of shade was undertaken with aid of the VITA Easyshadetrade mark (DeltaE*ab) and was performed after tooth staining and at 7, 14 and 21 days after bleaching, based on the CIELAB system. Data were analysed by anova for repeated measurements, Tukey and Dunnett tests (alpha = 0.05).

RESULTS

The Tukey test revealed that group A1 (10.58 +/- 4.83 DeltaE*ab) was statistically different from the others (A2, 19.57 +/- 4.72 DeltaE*ab and A3, 17.58 +/- 3.33 DeltaE*ab), which were not different from each other. At 7 days: A1 was significantly different from A2; at 14 and 21 days: A2 and A3 were significantly better than A1; the Dunnett test revealed that the control group was different from A1, A2 and A3 at all periods (P < 0.05).

CONCLUSION

Sodium perborate associated with both 10% and 35% carbamide peroxide was more effective than when associated with distilled water.

Authors+Show Affiliations

Department of Restorative Dentistry, São José dos Campos School of Dentistry, São Paulo State University, São Paulo, Brazil. karenyui@fosjc.unesp.brNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article

Language

eng

PubMed ID

18422585

Citation

Yui, K C K., et al. "Ex Vivo Evaluation of the Effectiveness of Bleaching Agents On the Shade Alteration of Blood-stained Teeth." International Endodontic Journal, vol. 41, no. 6, 2008, pp. 485-92.
Yui KC, Rodrigues JR, Mancini MN, et al. Ex vivo evaluation of the effectiveness of bleaching agents on the shade alteration of blood-stained teeth. Int Endod J. 2008;41(6):485-92.
Yui, K. C., Rodrigues, J. R., Mancini, M. N., Balducci, I., & Gonçalves, S. E. (2008). Ex vivo evaluation of the effectiveness of bleaching agents on the shade alteration of blood-stained teeth. International Endodontic Journal, 41(6), 485-92. https://doi.org/10.1111/j.1365-2591.2008.01379.x
Yui KC, et al. Ex Vivo Evaluation of the Effectiveness of Bleaching Agents On the Shade Alteration of Blood-stained Teeth. Int Endod J. 2008;41(6):485-92. PubMed PMID: 18422585.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ex vivo evaluation of the effectiveness of bleaching agents on the shade alteration of blood-stained teeth. AU - Yui,K C K, AU - Rodrigues,J R, AU - Mancini,M N G, AU - Balducci,I, AU - Gonçalves,S E P, Y1 - 2008/04/12/ PY - 2008/4/22/pubmed PY - 2008/8/30/medline PY - 2008/4/22/entrez SP - 485 EP - 92 JF - International endodontic journal JO - Int Endod J VL - 41 IS - 6 N2 - AIM: To evaluate ex vivo effectiveness of the three formulations of bleaching materials for intracoronal bleaching of root filled teeth using the walking bleach technique. METHODOLOGY: Extracted premolar teeth were stained artificially with human blood. After biomechanical preparation, the root canals were filled and a 3-mm thick intermediate base of zinc phosphate cement was placed at the level of the cementoenamel junction. The teeth were divided into four groups (n = 12): C (control, without bleaching material), A1 (sodium perborate + distilled water), A2 (sodium perborate + 10% carbamide peroxide) and A3 (sodium perborate + 35% carbamide peroxide). The bleaching materials were changed at 7 and 14 days. Evaluation of shade was undertaken with aid of the VITA Easyshadetrade mark (DeltaE*ab) and was performed after tooth staining and at 7, 14 and 21 days after bleaching, based on the CIELAB system. Data were analysed by anova for repeated measurements, Tukey and Dunnett tests (alpha = 0.05). RESULTS: The Tukey test revealed that group A1 (10.58 +/- 4.83 DeltaE*ab) was statistically different from the others (A2, 19.57 +/- 4.72 DeltaE*ab and A3, 17.58 +/- 3.33 DeltaE*ab), which were not different from each other. At 7 days: A1 was significantly different from A2; at 14 and 21 days: A2 and A3 were significantly better than A1; the Dunnett test revealed that the control group was different from A1, A2 and A3 at all periods (P < 0.05). CONCLUSION: Sodium perborate associated with both 10% and 35% carbamide peroxide was more effective than when associated with distilled water. SN - 1365-2591 UR - https://www.unboundmedicine.com/medline/citation/18422585/Ex_vivo_evaluation_of_the_effectiveness_of_bleaching_agents_on_the_shade_alteration_of_blood_stained_teeth_ L2 - https://doi.org/10.1111/j.1365-2591.2008.01379.x DB - PRIME DP - Unbound Medicine ER -