Effect of synthetic tissue fluid on microleakage of grey and white mineral trioxide aggregate as root-end filling materials : an in vitro study

Abstract EN

Objectives : the success of endodontic surgery has been shown to depend partly on the apical seal.

Grey mineral trioxide aggregate (GMTA) produces hydroxyapatite twice as often as white mineral trioxide aggregate (WMTA) when suspended in a phosphate buffered saline (PBS) solution.

The aim of this in vitro study was to compare the micro leakage phenomenon of gray and white mineral trioxide aggregates as root-end filling materials after immersion in synthetic tissue fluid (STF).

Methods: 55 single-rooted extracted maxillary anterior human teeth were divided into two experimental groups of 20 teeth each, plus 3 groups of 5 teeth each as two negative and one positive control groups.

The root canals were cleaned, shaped, and laterally compacted with gutta-percha.

The root ends were resected and 3 mm deep cavities were prepared.

The root-end preparations were filled with GMTA or WMTA in the experimental groups.

Leakage was determined using a dye penetration method.

Data were analysed using analysis of variance (ANOVA) at the 0.05 level of significance.

Results : the mean dye leakage was 0.40 ± 0.1 mm for GMTA and 0.50±0.1 mm for WMTA groups, respectively.

There was no significant difference between the two experimental groups (P = 0.14).

Conclusion : Despite the different properties and behaviors of GMTA and 1Research Center of Pharmaceutical Nano Technology, Tabriz University (Medical Sciences), Tabriz, Iran ; 2Department of Oral and Maxillofacial Pathology, Dental Faculty, Tabriz, Iran ; 3Kamal Asgar Research Center (KARC), Azad University, Dental Branch, Tehran, Iran; 4Department of Endodontic, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran; 5Department of Endodontics, Dental Branch, Islamic Azad University, Tehran, Iran, 6Department of Endodontics / Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.

Corresponding Author e-mail : *svosough.rare@yahoo.com.