Effect of Synthetic Tissue Fluid on Microleakage of Grey and White Mineral Trioxide Aggregate as Root-End Filling Materials: An in vitro study.
OBJECTIVE
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 microleakage 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).


CONCLUSIONS
Despite the different properties and behaviours of GMTA and WMTA in STF, there were no significant differences in microleakage when using GMTA or WMTA.
Research Center of Pharmaceutical Nano Technology, Tabriz University (Medical Sciences), Tabriz, Iran;
Mehrdad
M
Lotfi
Sepideh
S
Vosoughhosseini
Mohammad Ali
MA
Saghiri
Saeed
S
Rahimi
Vahid
V
Zand
Mohammad Forough
MF
Reyhani
Mohammad
M
Samiei
Negin
N
Ghasemi
Payman
P
Mehrvarzfar
Shahram
S
Azimi
Noushin
N
Shokohinejad