Comparison of physical and mechanical properties of mineral trioxide aggregate and Biodentine.
BACKGROUND
Mineral trioxide aggregate (MTA) fulfills many of the ideal properties of the root-end filling material. However, its low cohesive property often makes it difficult to handle. Biodentine, new calcium-silicate-based cement has been developed to improve some MTA drawbacks such as its difficult handling property and long-setting time.


OBJECTIVE
The objective of this study was to compare at different times the microleakage of roots filled with Biodentine and white MTA (WMTA)-Angelus and to investigate their setting time, handling properties and compressive strength.


METHODS
Root canals of single-rooted teeth were instrumented, filled with either Biodentine or WMTA-Angelus (n=15 each) with two positive and two negative control roots and stored at 37°C. Sealing was assessed at 4, 24 h, 1, 2, 4, 8, and 12 weeks by a fluid filtration method. The initial setting time, handling properties, and compressive strength of the test groups were investigated by a vicat needle, questionnaire of operational hand feel, and universal instron machine, respectively.


RESULTS
Significant differences in microleakage were found between two groups at 4-h and 24 h (P<0.05) and no difference at 1, 2, 4, 8, and 12 weeks. No significant difference was seen in the setting time of MTA-Angelus and Biodentine, though latter was found to have better handling consistency. Compressive strength of Biodentine was significantly higher than MTA-Angelus.


CONCLUSIONS
The results suggest that the new calcium-silicate-based endodontic cement provides improvement in sealing ability as well as clinical manageability of dental filling materials.
Department of Conservative Dentistry and Endodontics, Maulana Azad Institute of Dental Sciences, MAMC Complex, Bahadur Shah Zafar Marg, New Delhi, India.
Naziya
N
Butt
Sangeeta
S
Talwar
Sarika
S
Chaudhry
Ruchika Roongta
RR
Nawal
Seema
S
Yadav
Anuradha
A
Bali
D017607:Aluminum Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D003763:Dental Leakage; D003799:Dental Stress Analysis; D004338:Drug Combinations; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry*; D057872:Pulp Capping and Pulpectomy Agents / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*
D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D057872:Pulp Capping and Pulpectomy Agents; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; C506393:tricalcium silicate