MTA as root canal sealer

Mineral trioxide aggregate (MTA) is used primarily to seal lateral root perforations, as a root-end filling material .MTA can also be used for a variety of other applications  including pulp capping and pulpotomy procedures

Newer developments of MTA include its use as a root canal sealer. Currently, three MTA sealer formulations are available; Endo-CPM-Sealer ,MTA Obtura and ProRoot Endo Sealer.

The composition of CPM sealer after mixing is reported to be 50% MTA (Si02, K20, A1203, SO3, CaO and Bi203), 7% Si02, 10% CaCO3, 10% Bi203, 10% BaSO4, 1% propylene glycol alginate, 1% propylene glycol, 1% sodium citrate and 10% calcium chloride .

MTA-Obtura is a mixture of white MTA with a proprietary viscous liquid.

ProRoot Endo Sealer is calcium silicate based endodontic sealer. The major components of the powder of ProRoot Endo Sealer are tricalcium silicate and dicalcium silicate, with inclusion of calcium sulphate as setting retardant, bismuth oxide as radiopacifier and a small amount of tricalcium aluminate.

Sealers based on MTA have been reported to be biocompatible, stimulate mineralization and encourage apatite-like crystalline deposits along the apical and middle thirds of canal walls .

                                                                                REF;IEJ,2011,44(9)