Purpose: To compare gray MTA, white MTA and resin-modified glass-ionomer cement ( Fuji ) as barriers to prevent coronal leakage.
N= 78 Teeth
* The difference between grey and white MTA is reduced iron content in white MTA and the particle size is smaller to enhance handling and placement.
Inclusion and exclusion criteria: ✓Extracted anterior human teeth was used in this study.
Materials and methods:
•The extracted teeth were stored in 0.2% thymol solution and debrided of any soft tissue.
•After access cavity, cleaning and shaping, and obturation, the canals were cleaned of GP and sealer (coronal 3 mm)
•The sample was divided into 2 experimental groups ( 36 teeth each ) •Group I : 18 teeth received a 3mm barrier of grey MTA (A) and 18 teeth received white MTA (B).
•Group II : 18 teeth received a 3 mm barrier of Fuji RMGI cement (A) and 18 teeth received gray MTA (B)
•The remaining 6 teeth were used as control groups.
•A dual-chamber leakage model utilizing salivary microbes was used for the evaluation
•The experiment was conducted and groups were compared for a 30 days interval, a total of 90 days ( Table 2 ).
Most highlighted results:
•Group I: leakage was noted in 2 gray MTA samples and 3 white MTA samples
•Group II : leakage was noted in 1 gray MTA sample and 3 Fuji RMGI samples
•There was no significant difference in leakage between gray and white MTA or between gray MTA and Fuji
All materials used in this study can be considered materials of choice to be used as a coronal barrier for endodontically treated teeth since they seem to be promising in preventing coronal leakage . ( up to 90 days )