Document Type

Article

Peer Reviewed

1

Publication Date

10-1-2017

NLM Title Abbreviation

J Contemp Dent Pract.

Journal/Book/Conference Title

The Journal of Contemporary Dental Practice electronic resource

PubMed ID

28989123

DOI of Published Version

10.5005/jp-journals-10024-2142

Start Page

874

End Page

880

Total Pages

7

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 AND METHODS: 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.

CLINICAL SIGNIFICANCE: 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.

Keywords

OAfund, Antioxidants, Ascorbic acid, Bleaching agents, Composite resin, Dentin, Esthetic, Hydrogen peroxide, Laboratory research

Granting or Sponsoring Agency

College of Dental Medicine, Nova Southeastern University, Health Profession Division, Fort Lauderdale, FL, USA.

Grant Number

(HPD-COM-2013-19)

Journal Article Version

Version of Record

Published Article/Book Citation

J Contemp Dent Pract 2017;18(10):874-880

https://doi.org/(10):874-880

Recommended Citation

J. Contemp Dent Pract 2017;18(10):874-880. https://doi.org/(10):874-880

Included in

Dentistry Commons

COinS
 

URL

https://ir.uiowa.edu/oralsci_pubs/1