화이트엠티에이의 화학적 제거 MTA removal

BioMed Research International

Volume 2013 (2013), Article ID 469164, 7 pages

http://dx.doi.org/10.1155/2013/469164

 

Research Article

 

Removal of White Mineral Trioxide Aggregate Cement: A Promising Approach

 

Mohammad Ali Saghiri,1 Franklin Garcia-Godoy,2 James L. Gutmann,3 Nader Sheibani,1 Armen Asatourian,4 Mehrdad Lotfi,5 and Mayam Elyasi6

 

1Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA

2Bioscience Research Center, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN, USA

3Department of Restorative Sciences, Baylor College of Dentistry, Texas A&M University System Health Science Center, Dallas, TX, USA

4Kamal Asgar Research Center (KARC) and Dental School, Tehran, Iran

5Research Center for Pharmaceutical Nanotechnology and Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran

6Private practice, Tehran, Iran

 

Received 25 April 2013; Revised 2 August 2013; Accepted 8 August 2013

 

Academic Editor: Ali Abdalla

 

Copyright © 2013 Mohammad Ali Saghiri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

 

Abstract

 

Removal of MTA from dentin by applying 37% hydrochloric acid (HCl) to reduce microhardness and push-out bond strength. Forty dentin slices were filled with WMTA and divided into two groups (). Ten slices remained untreated while others were exposed to either HCl or phosphate buffer saline (PBS) and all samples were subjected to pushout test. The mode of bond failures was determined by SEM analysis. Later, twenty glass tubes were filled with WMTA and divided into two groups (). one side of tube was exposed to HCl or PBS while the other side remained untreated and the microhardness was analyzed by testing machine. HCl showed significantly lower pushout strength and microhardness values (), (). HCl treated samples showed mixed bond failures dominantly, while PBS samples mostly showed adhesive failures. The results of this study can suggest the 37% HCl as an effective solution to aid the removal of MTA from the dentin surfaces.