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CC BY-NC-ND 4.0 · Eur J Dent 2018; 12(04): 523-527
DOI: 10.4103/ejd.ejd_352_17
Original Article
Dental Investigation Society

Evaluation of home bleaching gel modified by different thickeners on the physical properties of enamel: An in situ study

Bruna Guerra Silva
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
,
Thayla Helle Nunes Gouveia
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
,
Marcelo de Assumpção Pereira da Silva
2   Paulista Central University Center, Institute of Physics of Sao Carlos, IFSC/USP, São Carlos, SP, Brazil
3   Paulista Central University Center, UNICEP, São Carlos, SP, Brazil
,
Gláucia Maria Bovi Ambrosano
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
,
Flávio Henrique Baggio Aguiar
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
,
Débora Alves Nunes Leite Lima
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
› Author Affiliations
Further Information

Publication History

Publication Date:
15 October 2019 (online)

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ABSTRACT

Objective: This in situ study evaluated the influence of 10% carbamide peroxide (CP) in combination with different thickeners on physical characteristics of enamel. Materials and Methods: Eighty-four bovine blocks of enamel and dentin (4 mm × 4 mm × 2.5 mm) were divided into seven groups (n = 12), fixed in palatal intraoral devices, and submitted to different treatments: CP + carbopol (FGM), CP + carbopol + glycerin (ultradent), CP + natrosol (experimental gel), carbopol, carbopol + glycerin, and natrosol, without treatment (control group). The physical properties tested were color (ΔE), roughness (Ra), and Knoop microhardness (KHN). Statistical Analysis Used: Data were submitted to ANOVA, Tukey's, and Dunnett's tests (α = 0.05). Results: all groups presented significant color variation, except carbopol. For microhardness, all bleached groups did not differ from control. Roughness increased in all bleached groups when compared to the control group, but CP + natrosol presented statistical lower results than CP + carbopol. Conclusion: Replacement of carbopol by natrosol caused less change on roughness surface, at the same time yielding an effective whitening result.

Key words:

Bleaching - carbopol - natrosol
 

  • REFERENCES

  • 1 Eimar H, Siciliano R, Abdallah MN, Nader SA, Amin WM, Martinez PP. et al. Hydrogen peroxide whitens teeth by oxidizing the organic structure. J Dent 2012; 40 (Suppl. 02) e25-33
    CrossrefPubMedGoogle Scholar
  • 2 Basting RT, Rodrigues Jr. AL, Serra MC. The effect of 10% carbamide peroxide, carbopol and/or glycerin on enamel and dentin microhardness. Oper Dent 2005; 30: 608-16
    PubMedGoogle Scholar
  • 3 Kawamoto K, Tsujimoto Y. Effects of the hydroxyl radical and hydrogen peroxide on tooth bleaching. J Endod 2004; 30: 45-50
    CrossrefPubMedGoogle Scholar
  • 4 Sun L, Liang S, Sa Y, Wang Z, Ma X, Jiang T. et al. Surface alteration of human tooth enamel subjected to acidic and neutral 30% hydrogen peroxide. J Dent 2011; 39: 686-92
    CrossrefPubMedGoogle Scholar
  • 5 Basting RT, Rodrigues Jr. AL, Serra MC. The effects of seven carbamide peroxide bleaching agents on enamel microhardness over time. J Am Dent Assoc 2003; 134: 1335-42
    CrossrefPubMedGoogle Scholar
  • 6 McCracken MS, Haywood VB. Demineralization effects of 10 percent carbamide peroxide. J Dent 1996; 24: 395-8
    CrossrefPubMedGoogle Scholar
  • 7 Gouveia TH, Públio JC, Ambrosano GM, Paulillo LA, Aguiar FH, Lima DA. et al. Evaluation of physical properties of a nanocomposite after aging, bleaching and staining. J Appl Biomater Funct Mater 2016; 14: e256-65
    PubMedGoogle Scholar
  • 8 van der Reijden WA, Buijs MJ, Damen JJ, Veerman EC, ten Cate JM, Nieuw Amerongen AV. et al. Influence of polymers for use in saliva substitutes on de- and remineralization of enamel in vitro . Caries Res 1997; 31: 216-23
    CrossrefPubMedGoogle Scholar
  • 9 Potocnik I, Kosec L, Gaspersic D. Effect of 10% carbamide peroxide bleaching gel on enamel microhardness, microstructure, and mineral content. J Endod 2000; 26: 203-6
    CrossrefPubMedGoogle Scholar
  • 10 Shannon H, Spencer P, Gross K, Tira D. Characterization of enamel exposed to 10% carbamide peroxide bleaching agents. Quintessence Int 1993; 24: 39-44
    PubMedGoogle Scholar
  • 11 Sa Y, Chen D, Liu Y, Wen W, Xu M, Jiang T. et al. Effects of two in-office bleaching agents with different pH values on enamel surface structure and color: An in situ vs. in vitro study. J Dent 2012; 40 (Suppl. 01) e26-34
    CrossrefPubMedGoogle Scholar
  • 12 Rodrigues JA, Marchi GM, Ambrosano GM, Heymann HO, Pimenta LA. Microhardness evaluation of in situ vital bleaching on human dental enamel using a novel study design. Dent Mater 2005; 21: 1059-67
    CrossrefPubMedGoogle Scholar
  • 13 Tezel H, Ertaş OS, Ozata F, Dalgar H, Korkut ZO. Effect of bleaching agents on calcium loss from the enamel surface. Quintessence Int 2007; 38: 339-47
    PubMedGoogle Scholar
  • 14 Humphrey SP, Williamson RT. A review of saliva: Normal composition, flow, and function. J Prosthet Dent 2001; 85: 162-9
    CrossrefPubMedGoogle Scholar