Use of Resin Solvent as a Facilitator for Removal of Resin Composite Restoratives by Influencing their Mechanical Properties: Is this Possible?

JOURNAL TITLE: Journal of Operative Dentistry & Endodontics

Author
1. Inas A Elghandour
ISSN
DOI
10.5005/jp-journals-10047-0074
Volume
4
Issue
1
Publishing Year
2019
Pages
5
Author Affiliations
    1. Department of Restorative Dental Science, College of Dentistry, Imam Abdul Rahman Bin Faisal University, Dammam, Kingdom of Saudi Arabia; Department of Operative Dentistry, Faculty of Dentistry, Cairo University, Cairo, Egypt
  • Article keywords
    Laboratory research, Mechanical properties, Removal of resin composite, Resin composites, Resin remover, Resin solvent

    Abstract

    Aim: The aim is to evaluate the influence of resin solvent on Vickers microhardness, flexural strength, and flexural modulus of a resin composite in order to test the ability of resin solvent to soften or weaken resin composite during replacement of failed restoration. Materials and methods: Fifty specimens were prepared from Tetric N-Ceram; forty used for flexural strength and elastic modulus tests and ten used for microhardness test. For flexural strength; they were divided into four groups of ten specimens each; in first group; specimens were not subjected to resin solvent (control), in second, third and fourth groups; specimens were subjected to resin solvent for 1, 3, and 5 minutes respectively. For microhardness, specimens were examined before after application of resin solvent for 1, 3, and 5 minutes with a total of forty readings. Collected data were statistically analyzed. Results: Resin solvent was found to reduce significantly the flexure strength of Tetric N-Ceram compared to the control group. Differences in flexure strength between 1, 3, and 5 minutes applications were statistically nonsignificant. For elastic modulus and microhardness, the influence of resin solvent on resin composite was statistically nonsignificant. Conclusion: Resin solvent weakens the flexural strength of resin composite but did not affect its microhardness or elastic modulus. Increasing the time of application from 1, 3, and 5 minutes did not further reduce the flexural strength. Clinical significance: Resin solvent had shown promising potentials to reduce the strength and hence facilitate removal of failed composite restoration during replacement.

    © 2019 Jaypee Brothers Medical Publishers (P) LTD.   |   All Rights Reserved