Effect of Two-minute Application of 35% Sodium Ascorbate on Composite Bond Strength following Bleaching.
J Contemp Dent Pract
; 18(10): 874-880, 2017 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-28989123
ABSTRACT
AIM:
The aim of this study is to assess the effect of 35% sodium ascorbate on microtensile bond strength of dentin immediately after bleaching with 35% hydrogen peroxide. MATERIALS ANDMETHODS:
A total of 25 sound human 3rd molars were collected. Teeth were randomly divided into five groups for different treatments Group I [bleaching + immediate bonding (i.e., restoration)], group II (bleaching + delayed bonding), group III (bleaching + sodium ascorbate + immediate bonding), group IV (bleaching + sodium ascorbate + delayed bonding), and group V (bonding only). After bleaching, but before bonding, groups II and IV were stored for 1 week in deionized water at 37°C. All samples were bonded using OptiBoned FL (Kerr) and Filtek Supreme (3M/ESPE). Teeth were sectioned into 1 × 1 mm 2 bars, and microtensile bond strength was tested with a universal testing machine (Instron 8841) at a cross-head speed of 0.5 mm/minute.RESULTS:
Microtensile bond strength differed significantly across the five groups, with a significant reduction in microtensile bond strength observed for samples in group I relative to samples in any of the other treatment groups (p < 0.05).CONCLUSION:
The application of a high concentration of sodium ascorbate for a shorter time reversed the negative effect of 35% hydrogen peroxide bleaching on composite bonding strength to dentin. CLINICALSIGNIFICANCE:
The negative effects of bleaching on composite bonding can be neutralized by the application of the reversing agent sodium ascorbate thus, increasing the efficiency of clinic chair time. This is clinically relevant for those patients requiring restorative treatment immediately after in-office bleaching.Palavras-chave
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ácido Ascórbico
/
Clareamento Dental
/
Colagem Dentária
/
Clareadores Dentários
/
Peróxido de Hidrogênio
Limite:
Humans
Idioma:
En
Revista:
J Contemp Dent Pract
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article