Understanding Mineral Trioxide Aggregate/Portland-Cement: A Review of Literature and Background Factors (Report‪)‬

Background--Development of MTA Portland cement. Portland cement (PC) is a fine powder produced by grinding cement clinker. It is classified as a hydraulic cement, which normaly is, composed of 65% lime, 20% silica, 10% alumina and ferric oxide and 5% other compounds. Lime is composed of calcium and magnesium oxides. PC is produced by grinding clay and lime-bearing minerals in the correct proportions and then heating the mixture to 1,400[degrees]C. This process called calcination produces physical and chemical changes in the raw materials. The resulting "clinker" is ground to a fine powder and a small amount of gypsum is added to retard the setting process.