Vieira Henrique Heringer, Toledo Josè Carlos, Catelan Anderson, Gouveia Thayla Hellen Nunes, Aguiar Flávio Henrique Baggio, Lovadino Josè Roberto, Lima Dèbora Alves Nunes Leite
Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil.
Department of Chemistry, Faculty of Philosophy and Sciences of Ribeirão Preto, University of São Paulo - FFCLRP/USP, Ribeirão Preto, SP, Brazil.
Eur J Dent. 2018 Apr-Jun;12(2):163-170. doi: 10.4103/ejd.ejd_165_17.
This study aimed to evaluate the effect of the application of sodium metabisulfite (SMB) on the bond strength of bleached teeth.
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 ( = 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 ( = 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.
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.
In part 1, data analysis revealed statistical differences ( < 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 ( = 0.001359) only between the bleached group and others.
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.
本研究旨在评估焦亚硫酸钠（SMB）的应用对漂白牙齿粘结强度的影响。
本研究分为两部分。第一部分评估在粘结程序完成前1小时应用不同浓度SMB的情况。将50个样本块分为五组（每组n = 10）：对照组；用35%过氧化氢（HP）漂白；HP + 5% SMB；HP + 12.5% SMB；以及HP + 25% SMB。第二部分评估25% SMB凝胶在釉质或牙本质上的应用情况，包括应用时间。将60个样本块分为六组（每组n = 10）：对照组；用35% HP漂白；HP + 25% SMB在釉质中应用1小时；HP + 25% SMB在牙本质中应用1小时；HP + 25% SMB在釉质中应用10分钟；以及HP + 25% SMB在牙本质中应用10分钟。
在完成微剪切粘结测试后，使用单因素方差分析以及Tukey检验和Dunnett检验对数据进行分析。
在第一部分中，数据分析显示HP组与HP + 5% SMB组之间存在统计学差异（P < 0.0001）。在对照组与HP + 12.5% SMB组和HP + 25% SMB组之间未发现统计学差异。第二部分仅显示漂白组与其他组之间存在统计学差异（P = 0.001359）。
漂白后立即使用25% SMB凝胶能够逆转漂白对牙科复合材料与牙本质粘结强度的有害影响。
