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“Mineral trioxide aggregate” is a cementitious material, which is popular by its trade name MTA. It was first introduced in the year 1993 by Mohmoud Torabinejad at Loma Linda University in California, USA. MTA is a powder mixture of Portland cement clinker, bismuth oxide, and gypsum. It has gained a lot of importance in dentistry in recent years. This importance is because of its extensive use as apical restorative material as well as a medicament for Apexogenesis and Apexification treatment. As it sets by hydration process, the byproducts of insoluble calcium silicate hydrate and alkaline calcium hydroxide offer unique stability and potential to enhance hard tissue regeneration. This article reviewed the composition, types, properties of MTA and also its applications in the practice of dentistry.
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