J Korean Acad Conserv Dent.  2002 Jul;27(4):441-447. 10.5395/JKACD.2002.27.4.441.

Bleaching effect of carbamide peroxide gel on discolored nonvital teeth

• Park SA
• Kim SH
• Hwang YC
• Oh BJ
• Youn C
• Park YJ
• Jeong SW
• Hwang IN
• Oh WM

• KMID: 1987300
• DOI: http://doi.org/10.5395/JKACD.2002.27.4.441

Abstract

The bleaching of discolored nonvital teeth is conservative treatment that satisfy the cosmetic desire. The most common method for this treatment, walking bleaching, is using 30% hydrogen peroxide and sodium perborate. Many alternatives are suggested for preventing the external cervical root resorption that is the common complication of the nonvital teeth bleaching with 30% hydrogen peroxide. The same extent of oxidation reactions as that resulted by the bleaching with the application of 30% hydrogen peroxide and sodium perborate can also be acquired more safely by materials that contain 10% carbamide peroxide, used primarily for the bleaching of vital teeth. Therefore, this study was performed to evaluate the efficacy of 10% and 15% carbamide peroxide bleaching gel in nonvatal teeth bleaching. The internal bleaching of intentionally discolored teeth was performed in vitro with 10% carbamide peroxide (Group 1), 15% carbamide peroxide (Group 2), mixture of distilled water and sodium perborate (Group 3), and mixture of 30% hydrogen peroxide and sodium perborate (Group 4). The bleaching materials were refreshed following 3, 6, 9 and 12 days. To evaluate the bleaching effect, the color change of the crowns was measured at 1, 2, 3, 4, 7 and 15 days of bleaching using the colorimeter. The results were as follows : 1. L* and DeltaE* values were increased with time in all bleaching agents(p<0.01). 2. There was no significant difference in L* and DeltaE* value among bleaching agents. 3. DeltaE* value higher than 3 was shown after 3 days of bleaching with 10% carbamide peroxide gel, 1 day with 15% carbamide peroxide gel, 4 days with mixture sodium perborate and distilled water and 4 days with mixture sodium perborate and 30% hydrogen peroxide, respectively. These results revealed that the use of 10% and 15% carbamide peroxide bleaching gel in non-vital teeth bleaching is as effective as mixture of distilled water and sodium perborate and mixture of 30% hydrogen peroxide and sodium perborate. Accordingly, carbamide peroxide could be used clinically to bleach discolored non-vital teeth.

Keyword

Bleaching; Nonvital teeth; Carbamide peroxide; Sodium perborate

MeSH Terms

Borates
Cosmetics
Crowns
Hydrogen
Hydrogen Peroxide
Intention
Peroxides
Root Resorption
Sodium
Tooth
Tooth Bleaching
Tooth, Nonvital
Urea
Walking
Water
Borates
Cosmetics
Hydrogen
Hydrogen Peroxide
Peroxides
Sodium
Urea
Water

Figure

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  Fig. 1 The L* values of the teeth are shown.

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  Fig. 2 The total color change of the teeth are shown.

Reference

1. Grossman LI. Endodontic Practice. 1978. ed. 2. Philadelphia: Lea & Febiger;322–323.

2. Nutting EB, Poe GS. A new combination of bleaching teeth. J South Calif Dent Assoc. 1963. 31:289–291.

3. Latcham NL. Postbleaching cervical resorption. J Endod. 1986. 12:262–264.

4. Goon WWY, Cohen S, Borer RF. External cervical root resorption following bleaching. J Endod. 1986. 12:414–418.

5. Friedman S, Rotstein I, Libfeld H, Stabholz A, Heling I. Incidence of external root resorption and esthetic results in 58 bleached pulpless teeth. Endod Dent Traumatol. 1988. 4:23–26.

6. Chivian N. Cohen S, Burns RC, editors. Root resorption. Pathways of the pulp. 1987. 4th ed. St. Louis: C.V Mosby;534–538.

7. Holmstrup G, Palm AM, Lambjerg-Hansen H. Bleaching of discolored root-filled teeth. Endod Dent Traumatol. 1988. 4:197–201.

8. Spasser HF. A simple bleaching technique using sodium perborate. NY State Dent J. 1961. 27:332–334.

9. Rotstein I, Alkind M, Mor C, Tarabeach A, Friedman S. In vitro efficacy of sodium perborate preparation used for intracoronal bleaching of discolored non-vital teeth. Endod Dent Traumatol. 1991. 7:177–180.

10. Rotstein I, Mor C, Friedman S. Prognosis of intracoronal bleaching with sodium perborate preparation in vitro: 1-year study. J Endod. 1993. 19:10–12.

11. Ho S, Goering AC. An in vitro comparison of different bleaching agents in the discolored teeth. J Endod. 1989. 15:106–111.

12. Costas FL, Wong M. Intracoronal isolating barriers : Effect of location root leakage and effectiveness of bleaching agents. J Endod. 1991. 17:365–368.

13. Rotstein I, Zyskind D, Lewinstein I, Baumberger N. Effect of different protective base materials on hydrogen peroxide leakage during intracoronal bleaching in vitro. J Endod. 1992. 18:114–117.

14. McInerney ST, Zillich R. Evaluation of intracoronal sealing ability of three materials. J Endod. 1992. 18:376–378.

15. Smith JJ, Cunningham CJ, Montgomery S. Cervical canal leakage after internal bleaching procedures. J Endod. 1992. 18:476–481.

16. Warren MA, Wong M, Ingram TA III. An in vitro comparison of bleaching agents on the crowns and root of discolored teeth. J Endod. 1990. 16:463–467.

17. Baratieri LN, Ritter AV, Monterio S Jr, Caldera de Andrada MA, Cardoso Vieira LC. Nonvital tooth bleaching: Guidelines for the clinician. Quintessence Int. 1995. 26:597–608.

18. Rotstein I. Role of catalase in the elimination of residual hydrogen peroxide following tooth bleaching. J Endod. 1993. 19:567–569.

19. Haywood VB, Heymann HO. Nightguard vital bleaching. Quintessence Int. 1989. 20:173–176.

20. Goldstein RE, Garbar DA. Complete dental bleaching. 1995. Hongkong Quintessence Publishing Co;25–33. 71–100.

21. Strassler HE. Insights and innovations: at-home bleaching. J Esthet Dent. 1989. 1:176.

22. Haywood VB, Heymann HO. Response of normal and tetracycline-stained teeth with pulp-size variation to nightguard vital bleaching. J Esthet Dent. 1994. 6:109–114.

23. Haywood VB. History, safty, and effectiveness of current bleaching techniques and applications of nightguard vital bleaching technique. Quintessence Int. 1992. 23:471–488.

24. Settembrini L, Gultz J, Kaim J, Scherer W. A technique for bleaching nonvital teeth : inside/outside bleaching. J Am Dent Assoc. 1997. 128:1283–1284.

25. Liebenberg WH. Intracoronal lightening of discolored pulpless teeth : A modified walking bleaching technique. Quintessence Int. 1997. 28:771–777.

26. Carillo A, Arrendondo Trevino MV, Haywood VB. Simultaneous bleaching of vital teeth and open-chamber nonvital tooth with 10% carbamide peroxide. Quintessence Int. 1998. 29:643–648.

27. Vachon C, Vanek P, Friedman S. Internal bleaching with 10% carbamide peroxide in vitro. Pract Periodontics Aesthet Dent. 1998. 10:1145–1154.

28. Freccia WF, Peters DD. A technique for staining extracted teeth : a research and teaching aid for bleaching. J Endod. 1982. 8:67–69.

29. Fasanaro T. Bleaching teeth: history, chemicals, and methods used for common tooth discolorations. J Esthet Dent. 1992. 4:71–78.

30. Kleber CJ, Putt MS, Nelson BJ. In vitro tooth whitening by a sodium bicarbonate/peroxide dentifrice. J Clin Dent. 1998. 9:16–21.

31. Bosch JJ, Coops JC. Tooth color and reflectance as related to light scattering and enamel hardness. J Dent Res. 1995. 74:374–380.

32. Lenhard M. Assessing tooth color change after repeated bleaching in vitro with a ten percent carbamide peroxide gel. J Am Dent Assoc. 1996. 127:1618–1624.

33. Kuehni FG, Marcus RT. An experiment in visual scanning of small color difference. Color Res Appl. 1979. 4:83–91.

34. Ruyter IE, Nilnu K, Moller B. Color stability of dental composite resin materials for crown and bridge veneers. Dent Mater. 1987. 3:246–251.

35. Gross MD, Moser JB. A colorimetric study of coffee and tea staining of four composite resins. J Oral Rehabil. 1977. 4:311–322.

36. Seghi RR, Hewlett ER, Kim J. Visual and instrumental colorimetric assessments of small color differences on translucent dental porcelain. J Dent Res. 1989. 68:1760–1764.