CC BY-NC-ND 4.0 · Eur J Dent 2018; 12(02): 163-170
DOI: 10.4103/ejd.ejd_165_17
Original Article
European Journal of Dentistry

Effect of sodium metabisulfite gel on the bond strength of dentin of bleached teeth

Henrique Heringer Vieira
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
,
Josè Carlos Toledo Jr.
2   Department of Chemistry, Faculty of Philosophy and Sciences of Ribeirão Preto, University of São Paulo – FFCLRP/USP, Ribeirão Preto, SP, Brazil
,
Anderson Catelan
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
,
Thayla Hellen Nunes Gouveia
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
,
Flávio Henrique Baggio Aguiar
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
,
Josè Roberto Lovadino
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
,
Dèbora Alves Nunes Leite Lima
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
› Author Affiliations
Further Information

Publication History

Publication Date:
16 September 2019 (online)

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ABSTRACT

Objective: This study aimed to evaluate the effect of the application of sodium metabisulfite (SMB) on the bond strength of bleached teeth. Materials and Methods: The study was divided into two parts. The first part evaluated the application of various concentrations of SMB for 1 h prior to the completion of bonding procedures. Fifty blocks were divided into five groups (n = 10): control; bleaching with 35% hydrogen peroxide (HP); HP + 5% SMB; HP + 12.5% SMB; and HP + 25% SMB. The second part evaluated the application of 25% gel SMB to either enamel or dentin, including the application time. Sixty blocks were divided into six groups (n = 10): control; bleaching with 35% HP; HP + 25% SMB for 1 h in enamel; HP + 25% SMB for 1 h in dentin; HP + 25% SMB for 10 min in enamel; and HP + 25% SMB for 10 min in dentin. Statistical Analysis: Following the completion of microshear bond testing, data were analyzed using one-way analysis of variance as well as Tukey's and Dunnett's tests. Results: In part 1, data analysis revealed statistical differences (P < 0.0001) between HP and HP + 5% SMB. No statistical differences were found between the control and both HP + 12.5% SMB and HP + 25% SMB. Part 2 revealed a statistical difference (P = 0.001359) only between the bleached group and others. Conclusions: The use of 25% SMB gel immediately after bleaching was able to reverse the deleterious effect of bleaching on the bond strength of dental composites to dentin.